REFLECTOR: firewall placement

[Andrew Ellzey]

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)
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