Message #642

Date: Oct 10 2000 23:18:28 EDT
From: "MotorcycleShopper.com" <mshopper@cfl.rr.com>
Subject: Re: wing rib dimensions

At 07:15 PM 10/10/2000, you wrote:
>FlyBaby
>
>Let me be more specific...correct Luis...the distance
>between front and rear spars, centerline to
>centerline, is 27 in. in Fig 4-1.  When Fig 4-2A, Full
>size rib drawing, is taped together, the centerline to
>centerline distance between spars is 26 5/8 in.
>Thanks for the response Luis.
>
>Matt

I measured 4-2A on a light table and my results also fall short of the 27" 
from spar centerlines as you mentioned (but only by 1/16 of an inch).

The problem of using the templates provided is that, in most cases, the 
paper distorts and therefore it yields poor results. I learned this the 
hard way when building the Thorp. As they say, when you're done with your 
project you'll have a plane and a half.

I don't know what can be done to fix your problem, short of making new ribs 
or using a thicker spar. Also, and please don't laugh, I've been stumped 
more than once due to a "cheapo" ruler. You may want to get a "second 
opinion" from a different one.
This IS NOT an exact science, and reading some of the early articles 
written by Mr. Bowers will prove that point.

Sorry I can't provide a good solution for you.

Luis Hernandez Jr.
CEO
Payne Corporation

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