REFLECTOR: Sun-n-fun pics
Steve Hord
steve at hord.com
Mon Apr 27 22:33:24 CDT 2009
Fresh back from sun n fun and am sorting through a bunch of pics. Here
is a link to some pics of the velocities that were there over the
weekend, I have a bunch of other AC if anyone is interested. The
factory had a demo of their new dual side stick control, looks real
nice. I also sat through a workshop with Bud Warren of Geared Drives
with his GM LS-1 engine and PRSU unit. He claims the same things as
before, it's perfect and is the best thing since sliced bread, but his
pamphlets still show him with his wheeler that burned up a while back.
I'd love to seem some time on his system and as he claims himself, to
see the proof in the pudding. Is anyone using his PRSU on a Velo?
He has a guy in an RV-10 that is right at the 40-hour mark by his DAR,
but not close enough to bring it down. Also says he is working on a
supercharged Subaru @260HP and lighter than an IO360. Thought some of
you would be interested.
www.velocitiesatsunnfun.shutterfly.com
Steve Hord
Cardinal Home Inspection
Phone (850) 215-4700
Fax (850) 215-5255
-----Original Message-----
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Sent: Monday, April 27, 2009 4:41 PM
To: reflector at tvbf.org
Subject: Reflector Digest, Vol 59, Issue 100
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Today's Topics:
1. Re: Ivo and Vesta (Scott Derrick)
2. Re: Ivo and Vesta (Scott Derrick)
3. Re: Running without prop (Alex Balic)
----------------------------------------------------------------------
Message: 1
Date: Mon, 27 Apr 2009 15:34:19 -0600
From: Scott Derrick <scott at tnstaafl.net>
Subject: Re: REFLECTOR: Ivo and Vesta
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <49F624DB.309 at tnstaafl.net>
Content-Type: text/plain; charset="iso-8859-1"
Alex, I think your right. Somebody else mentioned the redrive, because
it doubles the pulses and uses a belt that absorbs a lot of the pulse.
Scott
Alex Balic wrote:
> Scott,
> One thing to keep in mind with your comparison is that the V6 probably
is
> running with a Re-drive- (2:1) so you have about 6 power pulses per
> revolution of the prop vs. just 3 on the 6 continental and just 2 on a
4
> cylinder Lycoming. Also- most of the PSRU's have some type of internal
> damper- mine has clutch-type springs, some have rubber shocks in
there, or
> run with a belt or hy-vo chain so added up, there is a big difference,
even
> before talking about balance of the engine.
>
> Alex
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]
On
> Behalf Of Scott Derrick
> Sent: Thursday, April 23, 2009 6:15 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: Ivo and Vesta
>
> Kurt,
>
> I wonder whats the difference in power pulses between a Chevy V6
> and a Continental flat 6? Why does one hammer a prop and the other
not?
>
> Scott
>
> nmflyer1 at aol.com wrote:
>
>> Mike,
>>
>> That is good to hear! After asking me tons of questions and
carefully
>> considering my setup, IVO said they would provide me a prop that
would
>> meet my needs. I have a 76" Magnum CS. I have not put it on yet
>> because I want to get my painting done first.
>>
>> In fact, IVO Co. called me a while back just to make sure I was happy
>> with the prop.. and I have had it on the shelf for years!.
>>
>> Hopefully it will be the right setup for my powerplant and provide me
>> service like yours.
>>
>> Kurt
>> 340HP Aluminum 4.3L V-6
>>
>>
>> -----Original Message-----
>> From: Michael Watson <mikewatsspg at gmail.com>
>> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
>> Sent: Thu, 23 Apr 2009 11:53 am
>> Subject: Re: REFLECTOR: Ivo and Vesta
>>
>> I've been running a IVO Magnum Electric Constant speed prop on a
>> Franklin (Std Elite RG) for ten years plus. Sent back twice for check
up
>> and refreshing. They are tough as nails, handles FOD well and as long
>> as Ivo's maintenance instructions are followed, seems to last
thousands
>> of hours.
>>
>> On Thu, Apr 23, 2009 at 8:27 AM, Andy Millin <amillin at sbcglobal.net
>> <mailto:amillin at sbcglobal.net>> wrote:
>>
>> Hey Larry,
>>
>> Believe it or not, I did a fair amount of research on the Ivo. I
>> wanted to use the Ivo. I gave the guy a call and we spoke for
>> nearly an hour.
>>
>> Way back in the day Mark Machado had mounted an Ivo on a standard
>> with an IO-360. He was VERY impressed with the performance. I
>> believe the write up was in Velocity Views. It sounded like it
>> was going to be better than sliced bread AND peanut butter. It
is
>> a real performer, great price, etc.
>>
>> Ivo's blades are very light. The prop is amazingly light. This
>> is a blessing and a curse. The prop does not have enough mass to
>> absorb the significant torque thrashing a big bore aircraft
engine
>> produces. In his own words "you could see the prop was just
being
>> tortured." At low RPM it was possible to see the blades flexing
>> length wise as the amazing shear forces were hitting the base.
>>
>> The blades are tough and as far as I know they never failed.
What
>> did happen was the blades would shift at the base. They would
>> work their way free from the bolts. Ivo compensated with a very
>> specific torquing regimen combined with stainless steel foil
>> marking tape on the seams. I believe this worked. However . not
>> all users of the prop were as vigilant or patient as they needed
>> to be.
>>
>> I believe Ivo called for torque the bolts, run the engine,
>> re-torque the bolts, re-run the engine, repeat until the torque
>> does not change between cycles.
>>
>> In 1997, Mark Ewart and his family were killed (Standard
Velocity
>> DMO-266). Please read the report yourself:
>> http://tinyurl.com/dhok3m It was RELATED to the Ivo. The
detail
>> related to the Prop is on the second page. Reading the whole
>> report is better.
>>
>> In the end Ivo decided to stop fighting with big bore aircraft
>> engines and their violent torque curves. His props really can
>> withstand 750 HP, you just have to h ave a relatively smooth
power
>> curve. Ivo has been a very good option for guys like Chris
Barber
>> running a rotary with reduction unit. Smooth.
>>
>> It works on the Franklin as a 6 cylinder 360 has smoother power
>> curve than 4 cylinder 360.
>>
>> As for the Vesta. If you want to read back in the Archives, I
was
>> one of the first, possibly even the first from the Velocity
>> community to speak with Jason Day. Jason is a very nice guy. I
>> had acted as a bit of a liaison to get him to work with Velocity
>> to develop a prop for us and have Velocity test the thing.
>>
>> A major portion of Jason's business is automotive conversions for
>> aircraft. His props have been running by-and-large on automotive
>> engines with reduction units on them - read smooth power curve.
>>
>> Jason's stuff looks great. I believe he has the background and
>> skills to make a great prop. Problem is, he didn't have ANY
>> experience with our prop running on an aircraft engine. Velocity
>> wanted to help, but were unwilling to risk Turbo Charlie $200K+
>> aircraft and a pilot on a completely untested prop.
>>
>> Velocity suggested that Jason give the prop to testers in the
>> Airboat industry and let them beat on it for a year. I don't
>> believe Jason was willing and I'm pretty sure this has never been
>> done.
>>
>> Bob Buls owns one of Jason's props. Bob is also going to run it
>> with one of Jason's automotive conversions.
>>
>> Dave Dent has a prop and has been working with Jason on it. I
>> sincerely wish Dave the best of luck on his flight testing and am
>> eager to hear his findings. This could be a great new option for
us.
>>
>> The other concern on the Vesta is the weight. It is a heavy
>> prop. I believe it might weigh 50 to 100% more than the MT or
>> Aero Composite.
>>
>> Please form your own opinions based on your own direct research.
>> For my soft pink body, I'll wait for someone else to strap one on
>> and hit the wild blue.
>>
>> Andy
>>
>> _______________________________________________
>> To change your email address, visit
>> http://www.tvbf.org/mailman/listinfo/reflector
>>
>> Visit the gallery! www.tvbf.org/gallery
<http://www.tvbf.org/gallery>
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
>> <http://www.tvbf.org/pipermail>
>> Check old archives:
>> http://www.tvbf.org/archives/velocity/maillist.html
>>
>>
>>
>>
>> --
>> Mike W.
>> 1997 Velocity Elite RG
>> Franklin /IVO Electric CS
>> Dual GRT EFIS Synthetic Vision
>> _______________________________________________
>> To change your email address, visit
>>
> http://www.tvbf.org/mailman/listinfo/reflector
>
>> Visit the gallery! www.tvbf.org/gallery
<http://www.tvbf.org/gallery>
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
<http://www.tvbf.org/pipermail>
>> Check old archives:
http://www.tvbf.org/archives/velocity/maillist.html
>>
>>
------------------------------------------------------------------------
>> Big savings on Dell XPS Laptops and Desktops!
>>
>>
>
<http://pr.atwola.com/promoclk/100126575x1219799634x1201361008/aol?redir
=htt
> p:%2F%2Fad.doubleclick.net%2Fclk%3B214133440%3B36002254%3Bj>
>
>>
------------------------------------------------------------------------
>>
>> _______________________________________________
>> To change your email address, visit
>>
> http://www.tvbf.org/mailman/listinfo/reflector
>
>> Visit the gallery! www.tvbf.org/gallery
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
>> Check old archives:
http://www.tvbf.org/archives/velocity/maillist.html
>>
>
>
>
> _______________________________________________
> To change your email address, visit
http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery! www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
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>
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Message: 2
Date: Mon, 27 Apr 2009 15:36:37 -0600
From: Scott Derrick <scott at tnstaafl.net>
Subject: Re: REFLECTOR: Ivo and Vesta
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <49F62565.8040304 at tnstaafl.net>
Content-Type: text/plain; charset="iso-8859-1"
I used a Catto fixed pitch on a IO360, and loved it. Cept for the long
take off rolls at high density altitude airports. At sea level take off
performance was great.
Scott
Leslie Huttunen wrote:
> I am considering a prop change from the MT that I use on a STD-RG with
> an IO360 and would be very interested to know if anyone is using an
> IVO on an IO360, and if so, 1) how may hours they have on the
> IVO-IO360 combination, 2) what their maintenance related issues have
> been, and 3) what you experience with take off and cruise performance
> (even best guesses would be helpful and much appreciated).
>
> Thanks very much,
>
> Leslie Huttunen
>
> On Apr 26, 2009, at 7:30 AM, <aminetech at bluefrog.com>
> <aminetech at bluefrog.com> wrote:
>
>> Here's the post by "Chuck" <c.harbert at comcast.net> that I was
>> referring to.
>>
>> John
>>
>> I know Ivo will sell you a prop for Lyc 6's because I have one, and
>> recently
>> bought parts for it. I'm not aware of any insurance problem with an
>> IVO prop
>> when I've renewed my policy.
>>
>> He won't sell you parts for a Lyc 4 cylinder because of a V crash
>> several
>> years ago. The owner who had lots of "help" building his plane later
>> had a
>> problem with the pitch motor, so he dismantled the prop enroute.
>> Instead of
>> following the tightening sequence (4 retightenings over a couple
hours)
>> which is absolutely critical (and well known), he was in a hurry and
>> took
>> off with his family onboard. Shortly afterward he started getting a
>> vibration and advised the tower that he would see if it would go away
>> instead of landing imediately. The blades separated from the hub and
all
>> perished. There was speculation that the powerful firing pulses every
>> 180
>> degrees of the 4 cyl. causes too much load for the clamping strength
>> of the
>> IVO, but there are other V's that have successfully used an IVO on
>> their Lyc
>> 4's for a long time.
>>
>> An Ivo is a less expensive (< $4K) in-flight adjustable pitch prop
that
>> works on twisting the carbon fiber reinforced blades to change pitch.
>> Some
>> people have said that this is not an efficient way to change pitch,
>> but it
>> does work. The blades are very strong and seem to work well in a
pusher
>> configuration. He has been making props for a long time particularly
for
>> ultralights.
>>
>> I'm sure some of the Franklin guys can tell us what they think of
their
>> IVO's.
>>
>>
>>
>>
>>
>> --- amillin at sbcglobal.net wrote:
>>
>> From: "Andy Millin" <amillin at sbcglobal.net>
>> To: "'Velocity Aircraft Owners and Builders list'"
<reflector at tvbf.org>
>> Subject: Re: REFLECTOR: Ivo and Vesta
>> Date: Sat, 25 Apr 2009 18:54:49 -0400
>>
>> John,
>>
>> There are several people running an Ivo on a 6 cylinder Franklin. I
>> have never heard of anyone running an Ivo on a 6 cylinder Lycoming.
>>
>> That being said, the 360 Lycoming has a greater negative pulse in its
>> 720 degree cycle than the 540 does. Even though it has more torque,
>> it is technically smoother power. Still, never heard of Ivo selling
>> one for a 540.
>>
>> Andy
>>
>> -----Original Message-----
>> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]
>> On Behalf Of aminetech at bluefrog.com
>> Sent: Friday, April 24, 2009 9:12 AM
>> To: Velocity Aircraft Owners and Builders list
>> Subject: Re: REFLECTOR: Ivo and Vesta
>>
>> I recall someone on the list has an IVO on a 6 cyl lycoming. IMO,
>> IVO is being over conservative, or perhaps their insurance is the
>> reason.
>>
>> John
>>
>> --- scott at tnstaafl.net wrote:
>>
>> From: Scott Derrick <scott at tnstaafl.net>
>> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
>> Subject: Re: REFLECTOR: Ivo and Vesta
>> Date: Thu, 23 Apr 2009 17:14:39 -0600
>>
>> Kurt,
>>
>> I wonder whats the difference in power pulses between a Chevy V6
>> and a Continental flat 6? Why does one hammer a prop and the other
not?
>>
>> Scott
>>
>> nmflyer1 at aol.com wrote:
>>> Mike,
>>>
>>> That is good to hear! After asking me tons of questions and
carefully
>>> considering my setup, IVO said they would provide me a prop that
would
>>> meet my needs. I have a 76" Magnum CS. I have not put it on yet
>>> because I want to get my painting done first.
>>>
>>> In fact, IVO Co. called me a while back just to make sure I was
happy
>>> with the prop.. and I have had it on the shelf for years!.
>>>
>>> Hopefully it will be the right setup for my powerplant and provide
me
>>> service like yours.
>>>
>>> Kurt
>>> 340HP Aluminum 4.3L V-6
>>>
>>>
>>> -----Original Message-----
>>> From: Michael Watson <mikewatsspg at gmail.com>
>>> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
>>> Sent: Thu, 23 Apr 2009 11:53 am
>>> Subject: Re: REFLECTOR: Ivo and Vesta
>>>
>>> I've been running a IVO Magnum Electric Constant speed prop on a
>>> Franklin (Std Elite RG) for ten years plus. Sent back twice for
>>> check up
>>> and refreshing. They are tough as nails, handles FOD well and as
long
>>> as Ivo's maintenance instructions are followed, seems to last
>>> thousands
>>> of hours.
>>>
>>> On Thu, Apr 23, 2009 at 8:27 AM, Andy Millin <amillin at sbcglobal.net
>>> <mailto:amillin at sbcglobal.net>> wrote:
>>>
>>> Hey Larry,
>>>
>>> Believe it or not, I did a fair amount of research on the Ivo. I
>>> wanted to use the Ivo. I gave the guy a call and we spoke for
>>> nearly an hour.
>>>
>>> Way back in the day Mark Machado had mounted an Ivo on a standard
>>> with an IO-360. He was VERY impressed with the performance. I
>>> believe the write up was in Velocity Views. It sounded like it
>>> was going to be better than sliced bread AND peanut butter. It
is
>>> a real performer, great price, etc.
>>>
>>> Ivos blades are very light. The prop is amazingly light. This
>>> is a blessing and a curse. The prop does not have enough mass to
>>> absorb the significant torque thrashing a big bore aircraft
engine
>>> produces. In his own words you could see the prop was just being
>>> tortured. At low RPM it was possible to see the blades flexing
>>> length wise as the amazing shear forces were hitting the base.
>>>
>>> The blades are tough and as far as I know they never failed.
What
>>> did happen was the blades would shift at the base. They would
>>> work their way free from the bolts. Ivo compensated with a very
>>> specific torquing regimen combined with stainless steel foil
>>> marking tape on the seams. I believe this worked. However not
>>> all users of the prop were as vigilant or patient as they needed
>>> to be.
>>>
>>> I believe Ivo called for torque the bolts, run the engine,
>>> re-torque the bolts, re-run the engine, repeat until the torque
>>> does not change between cycles.
>>>
>>> In 1997, Mark Ewart and his family were killed (Standard
Velocity
>>> DMO-266). Please read the report yourself:
>>> http://tinyurl.com/dhok3m It was RELATED to the Ivo. The
detail
>>> related to the Prop is on the second page. Reading the whole
>>> report is better.
>>>
>>> In the end Ivo decided to stop fighting with big bore aircraft
>>> engines and their violent torque curves. His props really can
>>> withstand 750 HP, you just have to h ave a relatively smooth
power
>>> curve. Ivo has been a very good option for guys like Chris
Barber
>>> running a rotary with reduction unit. Smooth.
>>>
>>> It works on the Franklin as a 6 cylinder 360 has smoother power
>>> curve than 4 cylinder 360.
>>>
>>> As for the Vesta. If you want to read back in the Archives, I
was
>>> one of the first, possibly even the first from the Velocity
>>> community to speak with Jason Day. Jason is a very nice guy. I
>>> had acted as a bit of a liaison to get him to work with Velocity
>>> to develop a prop for us and have Velocity test the thing.
>>>
>>> A major portion of Jasons business is automotive conversions for
>>> aircraft. His props have been running by-and-large on automotive
>>> engines with reduction units on them read smooth power curve.
>>>
>>> Jasons stuff looks great. I believe he has the background and
>>> skills to make a great prop. Problem is, he didnt have ANY
>>> experience with our prop running on an aircraft engine. Velocity
>>> wanted to help, but were unwilling to risk Turbo Charlie $200K+
>>> aircraft and a pilot on a completely untested prop.
>>>
>>> Velocity suggested that Jason give the prop to testers in the
>>> Airboat industry and let them beat on it for a year. I dont
>>> believe Jason was willing and Im pretty sure this has never been
>>> done.
>>>
>>> Bob Buls owns one of Jasons props. Bob is also going to run it
>>> with one of Jasons automotive conversions.
>>>
>>> Dave Dent has a prop and has been working with Jason on it. I
>>> sincerely wish Dave the best of luck on his flight testing and am
>>> eager to hear his findings. This could be a great new option for
>>> us.
>>>
>>> The other concern on the Vesta is the weight. It is a heavy
>>> prop. I believe it might weigh 50 to 100% more than the MT or
>>> Aero Composite.
>>>
>>> Please form your own opinions based on your own direct research.
>>> For my soft pink body, Ill wait for someone else to strap one on
>>> and hit the wild blue.
>>>
>>> Andy
>>>
>>> _______________________________________________
>>> To change your email address, visit
>>> http://www.tvbf.org/mailman/listinfo/reflector
>>>
>>> Visit the gallery! www.tvbf.org/gallery
>>> <http://www.tvbf.org/gallery>
>>> user:pw = tvbf:jamaicangoose
>>> Check new archives: www.tvbf.org/pipermail
>>> <http://www.tvbf.org/pipermail>
>>> Check old archives:
>>> http://www.tvbf.org/archives/velocity/maillist.html
>>>
>>>
>>>
>>>
>>> --
>>> Mike W.
>>> 1997 Velocity Elite RG
>>> Franklin /IVO Electric CS
>>> Dual GRT EFIS Synthetic Vision
>>> _______________________________________________
>>> To change your email address, visit
>>> http://www.tvbf.org/mailman/listinfo/reflector
>>>
>>> Visit the gallery! www.tvbf.org/gallery
<http://www.tvbf.org/gallery>
>>> user:pw = tvbf:jamaicangoose
>>> Check new archives: www.tvbf.org/pipermail
>>> <http://www.tvbf.org/pipermail>
>>> Check old archives:
http://www.tvbf.org/archives/velocity/maillist.html
>>>
>>>
------------------------------------------------------------------------
>>>
>>> Big savings on Dell XPS Laptops and Desktops!
>>>
<http://pr.atwola.com/promoclk/100126575x1219799634x1201361008/aol?redir
=http:%2F%2Fad.doubleclick.net%2Fclk%3B214133440%3B36002254%3Bj>
>>>
>>>
>>>
------------------------------------------------------------------------
>>>
>>>
>>> _______________________________________________
>>> To change your email address, visit
>>> http://www.tvbf.org/mailman/listinfo/reflector
>>>
>>> Visit the gallery! www.tvbf.org/gallery
>>> user:pw = tvbf:jamaicangoose
>>> Check new archives: www.tvbf.org/pipermail
>>> Check old archives:
http://www.tvbf.org/archives/velocity/maillist.html
>>
>>
>>
>> _______________________________________________
>> To change your email address, visit
>> http://www.tvbf.org/mailman/listinfo/reflector
>>
>> Visit the gallery! www.tvbf.org/gallery
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
>> Check old archives:
http://www.tvbf.org/archives/velocity/maillist.html
>>
>> _______________________________________________
>> To change your email address, visit
>> http://www.tvbf.org/mailman/listinfo/reflector
>>
>> Visit the gallery! www.tvbf.org/gallery
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
>> Check old archives:
http://www.tvbf.org/archives/velocity/maillist.html
>>
>> _______________________________________________
>> To change your email address, visit
>> http://www.tvbf.org/mailman/listinfo/reflector
>>
>> Visit the gallery! www.tvbf.org/gallery
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
>> Check old archives:
http://www.tvbf.org/archives/velocity/maillist.html
>>
>>
>> _______________________________________________
>> To change your email address, visit
>> http://www.tvbf.org/mailman/listinfo/reflector
>>
>> Visit the gallery! www.tvbf.org/gallery
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
>> Check old archives:
http://www.tvbf.org/archives/velocity/maillist.html
>
> _______________________________________________
> To change your email address, visit
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery! www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
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------------------------------
Message: 3
Date: Mon, 27 Apr 2009 16:40:41 -0500
From: "Alex Balic" <velocity_pilot at verizon.net>
Subject: Re: REFLECTOR: Running without prop
To: "'Velocity Aircraft Owners and Builders list'"
<reflector at tvbf.org>
Message-ID: <2B98BD01F31E45C9A190A27218D582CF at alex>
Content-Type: text/plain; charset=us-ascii
The magneto structure/flywheel is sufficient to run the small engines-
it is
enough flywheel for a single cylinder- and it is a little heavier than
you
think- it is not straight aluminum- it has iron magnets molded into it.
-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Scott Derrick
Sent: Monday, April 27, 2009 4:33 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Running without prop
Actually the tow motor I use for a 210 uses a lawn motor engine, no
blade, just a 4 inch diameter aluminum pulley, very little mass
whatsoever. runs great..
Darrell & Nora Kufalk wrote:
> This will convince you.
> Take the blade off your lawnmower and see if you can get it to run.
>
>
>
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]
On
> Behalf Of Scott Derrick
> Sent: Sunday, April 26, 2009 6:08 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: Running without prop
>
> I've heard the flywheel reason before. I thought the flywheel on my
> io360 was fairly beefy but that didn't seem to make any difference.
>
> I'm still unconvinced.
>
> Scott
>
> Keith Hallsten wrote:
>
>> Or, to be more precise, the prop is a significant portion of the
flywheel
>> system that the engine needs to run properly. The ring gear provides
only
>>
> a
>
>> portion of the flywheel effect necessary (and it's often held onto
the
>> crankshaft by the same bolts that would also hold the prop on).
Thus,
>>
> some
>
>> additional flywheel needs to bolted on.
>>
>> If you don't have a prop, you may be able to substitute a stand-in
like a
>> piece of lumber. However, you need to be absolutely sure that it's
sound,
>> balanced, and properly attached. A piece of lumber coming off a
running
>> engine would be a lethal missile!
>>
>> Keith Hallsten
>>
>>
>> -----Original Message-----
>> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]
On
>> Behalf Of Laurence Coen
>> Sent: Sunday, April 26, 2009 10:05 AM
>> To: Velocity Aircraft Owners and Builders list
>> Subject: Re: REFLECTOR: Running without prop
>>
>> Scott,
>>
>> I think the difference is that auto engines come with a flywheel and
an
>> aircraft engine prop is the flywheel.
>>
>> Larry Coen
>> N136LC
>>
>> --------------------------------------------------
>> From: "Scott Derrick" <scott at tnstaafl.net>
>> Sent: Sunday, April 26, 2009 8:45 AM
>> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
>> Subject: REFLECTOR: Running without prop
>>
>>
>>
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>> _______________________________________________
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>>
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>>
>> _______________________________________________
>> To change your email address, visit
>>
> http://www.tvbf.org/mailman/listinfo/reflector
>
>> Visit the gallery! www.tvbf.org/gallery
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
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>>
>>
>>
>
>
> _______________________________________________
> To change your email address, visit
http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery! www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives:
http://www.tvbf.org/archives/velocity/maillist.html
>
>
------------------------------
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End of Reflector Digest, Vol 59, Issue 100
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