REFLECTOR: Engine Mount Connection

[Kufalk]

Randy,

I don't know.  I'm not flying yet.  The engine had to be tipped up less than
1 degree to get it to line up.  I've been told it should not make any major
difference to the thrustline.  I've heard of other builders having shimmed
there engines to align the spinner with the cowling after flying awhile to
compensate for the rubber engine mounts sagging, without any problems.  Some
people have argued that it could actually improve takeoff and cruse
performance.

Darrell


----- Original Message ----- 
From: "Randy Wharton" <rwharton at buckeye-express.com>
To: "'Velocity Aircraft Owners and Builders list'" <reflector at tvbf.org>
Sent: Monday, February 21, 2005 4:42 AM
Subject: RE: REFLECTOR: Engine Mount Connection


> Darrel, How did shimming the engine so it centered in the hole affect the
> thrust line of the engine with respect to the plane? I'm certainly not
> anywhere near the point in construction that you are, but it would seem
that
> having the correct thrust line would be more important than centering the
> crank in the cowl. The cowl can be modified....
>
> Randy Wharton
> N248RB XL-RG
> http://occeng.org/velocity
>
>
>
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
> Behalf Of Kufalk
> Sent: Sunday, February 20, 2005 7:46 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: Engine Mount Connection
>
> Keith,
>
> 3 of the 5 bolts that came with the engine install kit were the wrong
> length.  Part of this was my own fault because I mounted the engine too
low
> and I had to make shims under the engine mount pads to "tilt" the engine
up
> to get the crank centered in the cowling hole.  But I think some of the
> bolts would have been too long anyway.
>
> Darrell Kufalk
> XLRG IO-540
>
> ----- Original Message ----- 
> From: KeithHallsten <mailto:KeithHallsten at quiknet.com>
> To: Velocity Aircraft Owners and Builders list <mailto:reflector at tvbf.org>
> Sent: Sunday, February 20, 2005 3:31 PM
> Subject: Re: REFLECTOR: Engine Mount Connection
>
> Bob,
>
> What you said is subject to misinterpretation.  There are also significant
> triax buildups on the non-engine side of the firewall as well, which
extend
> onto the fuselage.  These add a lot of the strength of the engine
> mount-to-fuselage joint.
>
> When I went to bolt my mount to the firewall, I found that the bolts that
> came with the kit for this purpose are considerably (more than 1/4 inch)
too
> long.  It makes me wonder if I have left something out!  Has anyone else
had
> to get shorter bolts for the mount-to-firewall connection?
>
> Keith Hallsten, XLFG  IO-540
>
> ----- Original Message ----- 
> From: SlvEgl99 at aol.com
> To: reflector at tvbf.org
> Sent: Sunday, February 20, 2005 7:28 AM
> Subject: Re: REFLECTOR: Engine Hard Points
>
> On my XL the hardpoints are built up of Triax on the engine side of the
> firewall. There are no "hardpoints" included in the kit, they are built of
> Triax. One is top center and the others are spaced to fit the mount. Each
> are several plies of glass (Three I think) about 4"x4" applied directly to
> the firewall.
>
> The IO540 mount fits on the rear of the firewall and the attaching points
> are around the sides, near the edges of it.
>
> Bob Wood
>
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