REFLECTOR: firewall placement
David Ullman
ullman at robustdecisions.com
Mon Dec 25 15:28:16 CST 2006
Steve,
I have a fast build and the factory had already put in the firewall and
bulkhead. When I went to put the canard in I noticed that the pilot side of
the front bulkhead is about a 1/4" aft of the other side leaving the canard
tips off by about an inch (fore and aft). I shimmed it square and was told
by the factory that this misalignment is in their jigs and doesn't make any
difference. It made a difference to me and I trust my measuring things 20+
times. Trust yourself, some of the factory stuff is off.
Dr. David G. Ullman
Robust Decisions Inc
1655 NW Hillcrest Drive
Corvallis, Oregon, 97330 USA
Phone 541-758-5088
Direct Phone: 541-754-3609
FAX 866-898-1007
ullman at robustdecisions.com
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Sent: Monday, December 25, 2006 10:00 AM
To: reflector at tvbf.org
Subject: Reflector Digest, Vol 31, Issue 61
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Today's Topics:
1. firewall placement (Steve Goldman)
2. Re: firewall placement (Keith Hallsten)
3. Re: Elite Seat Bracket and Speed Brake - thank you (Kevin Baker)
4. Re: firewall placement (Andrew Ellzey)
5. Re: Fuel resistant adhesive, homemade sniffle valve
(Dave Philipsen)
6. Re: a fun video "jet-man" (Dr. Golf)
----------------------------------------------------------------------
Message: 1
Date: Sun, 24 Dec 2006 14:15:40 -0500
From: Steve Goldman <steve at fatcatair.com>
Subject: REFLECTOR: firewall placement
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <458ED1DC.9090301 at fatcatair.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I expect that this question might get a laugh from long time builders
but I'd rather be safe than sorry.
I've been working on laying out my fuselage and when I placed my
firewall bulkhead and got it plumb and square I went to drill out the
index marks the factory put in the fuselage. Well the two lateral
marks pretty much go thru the center of the flange. The centerline
index just misses the front of the flange. I checked my longitudinal
level (for the 20th or so time) and it is per the manual. So I just
drilled a hole that hits the flange center. Now I'd chalk that up to
every thing be "approximate" but the other cause for concern is that
the cowl cut line is not parallel to the firewall either. It is "off"
in the same direction (and similar magnitude) as the index marks. If
the factory uses the index marks to draw that line it make perfect
sense. Anyhow I just thought I'd see if I should trust my leveling or
if the index marks being off should give me pause.
[ I had another wtf moment while positioning the bulkheads. (I
suspect there are dozens of these for every "builders moment. :-) When
I looked at the distance from where the foam transitions to front of
the gear bulkhead the space is different by about 1.5 inches. That
took me back as I couldn't believe I was that much out of square. So I
measured from the nose to the end of the foam and not too surprisingly
it was the foam that isn't symmetric. ]
--
Steve Goldman
'77 Tiger N28531
Velocity XL5-RG (T-3420hrs)
Pittsboro, NC (9NC8)
------------------------------
Message: 2
Date: Sun, 24 Dec 2006 12:44:46 -0800
From: "Keith Hallsten" <KeithHallsten at quiknet.com>
Subject: Re: REFLECTOR: firewall placement
To: "'Velocity Aircraft Owners and Builders list'"
<reflector at tvbf.org>
Message-ID: <000c01c7279c$5c75e480$0202a8c0 at OFFICE>
Content-Type: text/plain; charset="us-ascii"
Steve,
It sounds like you are doing the right things, and finding the sort of
variations in parts that is typical. Part of the 51% plus of building the
plane is getting the parts corrected before assembling them!
Keith Hallsten, XLFG
Structure complete, engine hung, system installation going slowly!
-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Steve Goldman
Sent: Sunday, December 24, 2006 11:16 AM
To: Velocity Aircraft Owners and Builders list
Subject: REFLECTOR: firewall placement
I expect that this question might get a laugh from long time builders
but I'd rather be safe than sorry.
I've been working on laying out my fuselage and when I placed my
firewall bulkhead and got it plumb and square I went to drill out the
index marks the factory put in the fuselage. Well the two lateral
marks pretty much go thru the center of the flange. The centerline
index just misses the front of the flange. I checked my longitudinal
level (for the 20th or so time) and it is per the manual. So I just
drilled a hole that hits the flange center. Now I'd chalk that up to
every thing be "approximate" but the other cause for concern is that
the cowl cut line is not parallel to the firewall either. It is "off"
in the same direction (and similar magnitude) as the index marks. If
the factory uses the index marks to draw that line it make perfect
sense. Anyhow I just thought I'd see if I should trust my leveling or
if the index marks being off should give me pause.
[ I had another wtf moment while positioning the bulkheads. (I
suspect there are dozens of these for every "builders moment. :-) When
I looked at the distance from where the foam transitions to front of
the gear bulkhead the space is different by about 1.5 inches. That
took me back as I couldn't believe I was that much out of square. So I
measured from the nose to the end of the foam and not too surprisingly
it was the foam that isn't symmetric. ]
--
Steve Goldman
'77 Tiger N28531
Velocity XL5-RG (T-3420hrs)
Pittsboro, NC (9NC8)
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------------------------------
Message: 3
Date: Sun, 24 Dec 2006 16:12:33 -0600
From: Kevin Baker <flykb at verizon.net>
Subject: Re: REFLECTOR: Elite Seat Bracket and Speed Brake - thank you
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>,
sbakr at comcast.net
Message-ID: <0JAS00DBNTOYBJYB at vms042.mailsrvcs.net>
Content-Type: text/plain; charset=us-ascii; format=flowed
Hi Scott,
Wanted to send out a huge "Thank you" to you.
I was trying to call you all week to request this plate, but work was
just too busy.
To my surprise I received a Christmas package from Velocity
yesterday. I was so excited.
Thank you so much.
Man - you guys are REALLY a class act.
Much appreciated,
Kevin Baker
At 01:54 PM 12/17/2006, Scott Baker wrote:
>Kevin,
>The installation calls for a small metal plate that gives support the the
>rear-inboard seat rail attach points for both the pilot and copilot seats.
>It measures about 3/16" thick x 3 x roughly 9" long. The plate sits on the
>floor is situated left-to-right. The middle portion of the plate resides
>inside the keel. The plate is secured to the keep with an "L" shape
>bracket. If you don't have a plate of this approximate dimension, we will
>send one.
>Best regards,
>Scott B.
>
>
>----- Original Message -----
>From: "Kevin Baker" <flykb at verizon.net>
>To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
>Sent: Sunday, December 17, 2006 11:42 AM
>Subject: [SPAM] REFLECTOR: Elite Seat Bracket and Speed Brake
>
>
> > Hi All,
> > I have the speed brake in (Elite Std RG) and was wondering if anyone
> > had any wisdom (potential problems) with putting in the Elite Front
> > seat rails. I thought there was something about the seat rail hard
> > point being in the area of where the speed brake is.??
> >
> > Merry Christmas,
> > 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
>
>_______________________________________________
>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: 4
Date: Sun, 24 Dec 2006 17:30:03 -0600
From: "Andrew Ellzey" <ajlz72756 at yahoo.com>
Subject: Re: REFLECTOR: firewall placement
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Message-ID: <001201c727b3$710cec10$8302a8c0 at DASINC>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Steve,
My factory marks for the windows and the cowlings didn't match anything
either. Trust your measurements and your levels. The factory alignment marks
for the canard bulkhead or the firewall didn't match either.
Andy Ellzey
XLRG
----- Original Message -----
From: "Keith Hallsten" <KeithHallsten at quiknet.com>
To: "'Velocity Aircraft Owners and Builders list'" <reflector at tvbf.org>
Sent: Sunday, December 24, 2006 2:44 PM
Subject: Re: REFLECTOR: firewall placement
> Steve,
>
> It sounds like you are doing the right things, and finding the sort of
> variations in parts that is typical. Part of the 51% plus of building the
> plane is getting the parts corrected before assembling them!
>
> Keith Hallsten, XLFG
> Structure complete, engine hung, system installation going slowly!
>
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
> Behalf Of Steve Goldman
> Sent: Sunday, December 24, 2006 11:16 AM
> To: Velocity Aircraft Owners and Builders list
> Subject: REFLECTOR: firewall placement
>
>
> I expect that this question might get a laugh from long time builders
> but I'd rather be safe than sorry.
>
> I've been working on laying out my fuselage and when I placed my
> firewall bulkhead and got it plumb and square I went to drill out the
> index marks the factory put in the fuselage. Well the two lateral
> marks pretty much go thru the center of the flange. The centerline
> index just misses the front of the flange. I checked my longitudinal
> level (for the 20th or so time) and it is per the manual. So I just
> drilled a hole that hits the flange center. Now I'd chalk that up to
> every thing be "approximate" but the other cause for concern is that
> the cowl cut line is not parallel to the firewall either. It is "off"
> in the same direction (and similar magnitude) as the index marks. If
> the factory uses the index marks to draw that line it make perfect
> sense. Anyhow I just thought I'd see if I should trust my leveling or
> if the index marks being off should give me pause.
>
> [ I had another wtf moment while positioning the bulkheads. (I
> suspect there are dozens of these for every "builders moment. :-) When
> I looked at the distance from where the foam transitions to front of
> the gear bulkhead the space is different by about 1.5 inches. That
> took me back as I couldn't believe I was that much out of square. So I
> measured from the nose to the end of the foam and not too surprisingly
> it was the foam that isn't symmetric. ]
>
> --
> Steve Goldman
> '77 Tiger N28531
> Velocity XL5-RG (T-3420hrs)
> Pittsboro, NC (9NC8)
> _______________________________________________
> 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: 5
Date: Sun, 24 Dec 2006 20:14:22 -0600
From: Dave Philipsen <velocity at davebiz.com>
Subject: Re: REFLECTOR: Fuel resistant adhesive, homemade sniffle
valve
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <458F33FE.5080003 at davebiz.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Keith,
I'll try to get some photos together (and part numbers) to show you soon.
Dave
Keith Hallsten wrote:
> Dave,
>
> Could you be a bit more specific on what fittings you are using for the
> sniffle valve? I need to come up with something for my IO-540.
>
> Keith Hallsten
>
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
> Behalf Of Dave Philipsen
> Sent: Friday, December 22, 2006 2:24 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: Fuel resistant adhesive, homemade sniffle valve
>
> Good point. Maybe I'm being too particular about it. The leak is very
> minimal.
>
>
> Sid Knox wrote:
>
>> Hi Dave,
>> If it is leaking "just a little bit", I would ignore it. I tiny air leak
>>
> at
>
>> that point is equivalent to blowing thru a straw compared to a hurricane.
>> To put it in perspective, think about the amount of air being sucked in
by
>>
>
>
>> the 360 cu in (or more) cylinders about 20 times each second. (360 x 20
=
>>
>
>
>> 7200 cu in compared to a "just a little bit". My opinion only.
>>
>> Sid Knox
>> Oklahoma
>>
>> Velocity 173 RG N199RS
>> Starduster N666SK
>> KR2 N24TC
>> W7QJQ
>>
>> ----- Original Message -----
>> From: "Dave Philipsen" <velocity at davebiz.com>
>> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
>> Sent: Friday, December 22, 2006 11:40 AM
>> Subject: REFLECTOR: Fuel resistant adhesive
>>
>>
>>
>>
>>> I am fashioning a homemade sniffle valve and would like some advice.
>>> The valve is pretty simple consisting of a small nylon piece that fits
>>> inside a couple of brass fittings. I've got it sealing pretty well when
>>> there's suction from the engine. The nylon part seats against the brass
>>> but it still leaks just a little bit. What I'd like to do is attach a
>>> small piece of silicone rubber to the nylon. Hopefully, the softer
>>> rubber will seal better against the brass. Does anyone know of an
>>> adhesive that should remain unaffected by 100LL?
>>>
>>>
>>>
>> _______________________________________________
>> 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
>>
>>
>>
>>
>
>
--
Dave Philipsen
Velocity STD-FG
N83DP
------------------------------
Message: 6
Date: Mon, 25 Dec 2006 09:20:16 -0800 (PST)
From: "Dr. Golf" <drgolf369 at yahoo.com>
Subject: Re: REFLECTOR: a fun video "jet-man"
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Message-ID: <681321.58372.qm at web38701.mail.mud.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
http://jet-man.com/actuel_eng.html
Check out this "jet-man" video. It is not great
quality but if you like flying and small turbines, you
will get a kick out of this.
Joel
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------------------------------
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