REFLECTOR: Reflector Digest, Vol 30, Issue 39 - Grand Rapids EFIS

Mark Riley anriley at comcast.net
Fri Nov 17 19:53:53 CST 2006


For those interested in the GRT EFIS system - I looked at the system at
Oshkosh and found it to be a terrific value. You can get a dual AHRS, 3
MFD's that switch between engine PFD and nav screens, weather and highway in
the sky for $13.5K. The only concern I had was the rather small screen size
and so so resolution. 

Greg Toman of GRT advised me today that they are coming out with a slightly
larger and substantially higher resolution screen. For those who purchase or
already have the system with the original screen, they will credit you full
price and let you trade up to the new screens. They plan to have them on
display at their booth at Sun 'n Fun and in production 3-4 months
thereafter. He advises to just leave about an inch of space in your panel
around the original units if you plan to upgrade later.

Something to think about.

-----Original Message-----
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Behalf Of reflector-request at tvbf.org
Sent: Friday, November 17, 2006 12:03 PM
To: reflector at tvbf.org
Subject: Reflector Digest, Vol 30, Issue 39

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Today's Topics:

   1. Re:  Franklin Mag (Laurence Coen)
   2. Re:  Franklin Mag (John Dibble)
   3. Re:  Franklin Mag (Ron Brown)
   4. Re:  Franklin Mag (Brian Michalk)
   5. Re:  Franklin Mag (John Dibble)
   6.  Upholstery Attaching (flykb at verizon.net)
   7. Re:  Franklin Mag (John Dibble)
   8. Re:  Jack Stands (Chuck Jensen)
   9. Re:  Upholstery Attaching (Al Gietzen)
  10. Re:  Upholstery Attaching (David Scharfenberg)


----------------------------------------------------------------------

Message: 1
Date: Thu, 16 Nov 2006 17:36:52 -0600
From: "Laurence Coen" <lwcoen at hotmail.com>
Subject: Re: REFLECTOR: Franklin Mag
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Message-ID: <BAY128-DAV18B7C154EC769EEBC5512ED3E90 at phx.gbl>
Content-Type: text/plain; format=flowed; charset="Windows-1252";
	reply-type=original

John,

The ultimate answer to all your questions are contained in the Unison F-1100

Master service manual which they will be happy to ship to you for only 
$75.00 US www.unisonindustries.com .

Having already removed the mag you have made putting it back on more 
difficult.  My procedure is to bring #1 cylinder up on compression, then the

impulse clicks, move the prop backward past TDC, then forward again to TDC. 
Then remove the mag.  My past experience is with Bendix mags and I haven't 
disassembled my Slicks yet.  Those locking devices make life a little easier

but are not essential.  I have had the mags off the Franklin and back on 
just being careful not to move the prop or the gear on the mag.    You will 
still need a mag timing device to set and synchronize the mags.

Larry Coen
N136LC
50 plus hours of fun

----- Original Message ----- 
From: "John Dibble" <aminetech at bluefrog.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Tuesday, November 14, 2006 7:21 PM
Subject: Re: REFLECTOR: Franklin Mag


> Guilty as charged.  I have the slick mag off.  The A/P I work with does 
> not have the
> tool to hold the mag while it is apart, but he says if I keep the gear 
> from moving I
> don't need the tool.  Anyone agree?
> What is the gap?  0.018?
> How do I make sure it is lined up right for remounting to the engine?
>
> Thanks,
> John
>
> Laurence Coen wrote:
>
>> John,
>>
>> Normal maintenance on a magneto at annual is to lube the cam and check 
>> the
>> point gap.  If this was not done, it's time.
>>
>> Larry Coen
>> N136LC
>> SE-RG Franklin/IVO
>>
>> ----- Original Message -----
>> From: "John Dibble" <aminetech at bluefrog.com>
>> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
>> Sent: Monday, November 13, 2006 11:16 AM
>> Subject: REFLECTOR: Franklin Mag
>>
>> > In the past I could start with just one mag and turn on the EI after.
>> > Now it won't start on the mag alone.  I have 500 hours and I think it
>> > may be time to replace the mag.  What are others doing?  Rebuild?
>> > Replace?
>> > Thanks,
>> > John
>> >
>> > _______________________________________________
>> > 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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>
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> 



------------------------------

Message: 2
Date: Thu, 16 Nov 2006 17:37:04 -0600
From: John Dibble <aminetech at bluefrog.com>
Subject: Re: REFLECTOR: Franklin Mag
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <455CF620.238FCCEF at bluefrog.com>
Content-Type: text/plain; charset=us-ascii

I'm trying to set the timing on the mag.  When turning the prop by hand,
does the mag
snap at the advance timing mark, or at another spot?

John



------------------------------

Message: 3
Date: Thu, 16 Nov 2006 19:17:29 -0500
From: "Ron Brown" <romott at roadrunner.com>
Subject: Re: REFLECTOR: Franklin Mag
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Message-ID: <00e401c709dd$c4be0b80$e618b64c at romott>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
	reply-type=original

Hi John,

On a Lycoming, the impulse coupling snaps at Top Dead Center.

The timing should be set on the advance mark, after the mag snaps.  IE, turn
the engine over until it snaps on Cylinder number 1, then turn the engine
backwards about 45 degrees.  Then go forward again and set the timing at the
advanced mark - on my 200 hp angle valve Lycoming IO 360 this is 25 degrees
Before Top Dead Center (or 22 according to a service bulletin or 20 degrees
for higher compression pistons).  Sorry, I don't know what the timing for a
Franklin is supposed to be.

You'll need a buzz box or a sensitive digital ohmmeter to sense the opening
of the points.  The resistance will change from about 0.5 ohms to about 0.7
ohms when the points open. (and don't let the mag snap while the ohmmeter is
connected - it may zap the ohmmeter).

Oh and a bit of explanation - the spark during starting needs to be retarded
or else the engine will kick back (some times so severe that it can break
the starter or starter gear).  So the impulse coupling delays the spark
until TDC while the engine is being turned slowly by the starter. Then when
the impulse coupling snaps (releases), it causes the magneto to spin faster 
thereby
generating a hotter spark for cranking.

That is one thing to look for when the engine doesn't seem to want to
crank - if you don't have the impulse coupling snapping, the spark is weak
and the engine will be difficult to start.

Ronnie

----- Original Message ----- 
From: "John Dibble" <aminetech at bluefrog.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Thursday, November 16, 2006 6:37 PM
Subject: Re: REFLECTOR: Franklin Mag


> I'm trying to set the timing on the mag.  When turning the prop by hand, 
> does the mag
> snap at the advance timing mark, or at another spot?
>
> John
>
> _______________________________________________
> 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
> 



------------------------------

Message: 4
Date: Thu, 16 Nov 2006 19:19:32 -0600
From: Brian Michalk <michalk at awpi.com>
Subject: Re: REFLECTOR: Franklin Mag
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <455D0E24.2070306 at awpi.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I seem to recall it's slightly ATDC.  I measured mine.  I'll go check to 
see if the layout fluid still has this scratched in.

Nope, just the mark, no degrees.  I pulled the prop through.  It looks 
very close to top center.

John Dibble wrote:
> I'm trying to set the timing on the mag.  When turning the prop by hand,
does the mag
> snap at the advance timing mark, or at another spot?
>
> John
>
> _______________________________________________
> 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
>   



------------------------------

Message: 5
Date: Thu, 16 Nov 2006 19:26:45 -0600
From: John Dibble <aminetech at bluefrog.com>
Subject: Re: REFLECTOR: Franklin Mag
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <455D0FD5.F3817B53 at bluefrog.com>
Content-Type: text/plain; charset=us-ascii

Ronnie,

Thanks.  That helps a lot.  I had used a flashlight to set the timing.  The
light dims
a little when the points open.  But it just isn't running right on the mag.
An
observer commented that it sounded like it was too advanced.  The mag was
snapping at
the advance mark, and from what you just wrote, that confirms that it is too
advanced.  Also at 1200 rpm it runs rough on just the mag.  At 1500 rpm,
when I switch
off the mag the rpms drop as expected.  When I switch off the EI, the rpm
stays about
the same as when both are on.  I think this is also indicating that it is
too
advanced.
Tomorrow I am going to make some more adjustments.  I can tell from how it
runs when
it's right, I just wanted to confirm that it is too advanced.

John

Ron Brown wrote:

> Hi John,
>
> On a Lycoming, the impulse coupling snaps at Top Dead Center.
>
> The timing should be set on the advance mark, after the mag snaps.  IE,
turn
> the engine over until it snaps on Cylinder number 1, then turn the engine
> backwards about 45 degrees.  Then go forward again and set the timing at
the
> advanced mark - on my 200 hp angle valve Lycoming IO 360 this is 25
degrees
> Before Top Dead Center (or 22 according to a service bulletin or 20
degrees
> for higher compression pistons).  Sorry, I don't know what the timing for
a
> Franklin is supposed to be.
>
> You'll need a buzz box or a sensitive digital ohmmeter to sense the
opening
> of the points.  The resistance will change from about 0.5 ohms to about
0.7
> ohms when the points open. (and don't let the mag snap while the ohmmeter
is
> connected - it may zap the ohmmeter).
>
> Oh and a bit of explanation - the spark during starting needs to be
retarded
> or else the engine will kick back (some times so severe that it can break
> the starter or starter gear).  So the impulse coupling delays the spark
> until TDC while the engine is being turned slowly by the starter. Then
when
> the impulse coupling snaps (releases), it causes the magneto to spin
faster
> thereby
> generating a hotter spark for cranking.
>
> That is one thing to look for when the engine doesn't seem to want to
> crank - if you don't have the impulse coupling snapping, the spark is weak
> and the engine will be difficult to start.
>
> Ronnie
>
> ----- Original Message -----
> From: "John Dibble" <aminetech at bluefrog.com>
> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> Sent: Thursday, November 16, 2006 6:37 PM
> Subject: Re: REFLECTOR: Franklin Mag
>
> > I'm trying to set the timing on the mag.  When turning the prop by hand,
> > does the mag
> > snap at the advance timing mark, or at another spot?
> >
> > John
> >
> > _______________________________________________
> > 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



------------------------------

Message: 6
Date: Thu, 16 Nov 2006 19:54:15 -0600 (CST)
From: <flykb at verizon.net>
Subject: REFLECTOR: Upholstery Attaching
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID:
	<1039391.5082161163728456023.JavaMail.root at vms073.mailsrvcs.net>
Content-Type: text/plain; charset=ISO-8859-1

Hi All,
What are folks using (and have found to work well) to attaching upholstery?

Thanks,
Kevin Baker


------------------------------

Message: 7
Date: Thu, 16 Nov 2006 20:54:34 -0600
From: John Dibble <aminetech at bluefrog.com>
Subject: Re: REFLECTOR: Franklin Mag
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <455D246A.59A2EB0B at bluefrog.com>
Content-Type: text/plain; charset=us-ascii

Thanks Brian.  I'm sure I have it too advanced.

John

Brian Michalk wrote:

> I seem to recall it's slightly ATDC.  I measured mine.  I'll go check to
> see if the layout fluid still has this scratched in.
>
> Nope, just the mark, no degrees.  I pulled the prop through.  It looks
> very close to top center.
>
> John Dibble wrote:
> > I'm trying to set the timing on the mag.  When turning the prop by hand,
does the mag
> > snap at the advance timing mark, or at another spot?
> >
> > John
> >
> > _______________________________________________
> > 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



------------------------------

Message: 8
Date: Fri, 17 Nov 2006 07:18:09 -0500
From: "Chuck Jensen" <cjensen at dts9000.com>
Subject: Re: REFLECTOR: Jack Stands
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Message-ID: <8984A39879F2F5418251CBEEC9C689B3286EE1 at lucky.dts.local>
Content-Type: text/plain;	charset="us-ascii"

Dave,Chuck/Kent

Thanks for the ideas for stands.  It really helps out us guys that don't
know jack.

Chuck Jensen
Do Not Archive 


-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Chuck Jensen
Sent: Tuesday, November 14, 2006 8:40 AM
To: Velocity Aircraft Owners and Builders list
Subject: REFLECTOR: Jack Stands


What are the best ideas out there for good jack stands for the Velo.
Desired characteristics are light as a feather, will lift small
buildings and solid as the Rock of Gibraltar...but I'm not
picking--don't care what color!!  I have some homemade ones from 4"
square steel tubing for the uprights welded onto steel tire rims for a
base.  Real solid, but the hernia surgeries are getting expensive.
Suggestions; brand or design?

Chuck Jensen
 
_______________________________________________
To change your email address, visit
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Visit the gallery!  www.tvbf.org/gallery
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Check new archives: www.tvbf.org/pipermail
Check old archives: http://www.tvbf.org/archives/velocity/maillist.html


------------------------------

Message: 9
Date: Fri, 17 Nov 2006 06:58:51 -0800
From: "Al Gietzen" <ALVentures at cox.net>
Subject: Re: REFLECTOR: Upholstery Attaching
To: "'Velocity Aircraft Owners and Builders list'"
	<reflector at tvbf.org>
Message-ID: <000601c70a58$e4e12a70$6400a8c0 at BigAl>
Content-Type: text/plain;	charset="us-ascii"


Hi All,
What are folks using (and have found to work well) to attaching upholstery?

Kevin;

I used V&S 1081 - Spray Trim Adhesive.  Got it from the local upholstery
fabrics store.  
Make sure any vinyl you use has a fabric backing.

Al



------------------------------

Message: 10
Date: Fri, 17 Nov 2006 10:59:03 -0600
From: David Scharfenberg <dave at winco.net>
Subject: Re: REFLECTOR: Upholstery Attaching
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <44379c84692cf37e3dc862680abc1aa9 at winco.net>
Content-Type: text/plain; charset=US-ASCII; format=flowed

The best stuff is 3M top and trim adhesive.  I bought mine from an 
aircraft interior shop, since it only seems to come in 5 and 55 gal. 
sizes.  They were nice enough to sell me a gallon, which I put in epoxy 
lined paint cans from Lowes.

Dave Scharfenberg



On Nov 16, 2006, at 7:54 PM, flykb at verizon.net wrote:

> Hi All,
> What are folks using (and have found to work well) to attaching 
> upholstery?
>
> Thanks,
> Kevin Baker
> _______________________________________________
> 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 30, Issue 39
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