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Old 07-06-2006 | 11:26 AM
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Campy
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From: Baltic, CT
Default RE: 2 Part Question

ORIGINAL: BSARGE

I have completed 2 scratch built airplanes many, many years ago... I have a set of plans for a sport/pattern plane, I have 2 questions about this that I never ran into before..

1- The wing is a tapered wing, the plan only shows one half of the wing...so I can't build the same half twice over the plan, do I just measure the distance in between the ribs then mark on the spars, I guess the notches in the ribs will take care of the taper.

>Oil the plan. Use some mineral oil and put it on the plan. Then
>cover the plan with some wax paper and build 1/2 of the wing.
>Turn the plan over, cover with wax paper and build the other half.
>
>I have done this for several scratch built planes that only show
>1/2 of the wing. The oil will not hurt the plan and as long as you
>remember to cover the oiled area prior to building, you will not
>be getting any oil on the wood.


2- The fuselage side view shows the wing attached, how do I determine exactly how to cut out the fuselage sides that will match the wing? The plan doesn't make it very clear. In my past builds the plan had a fuselage side by itself which clearly showed how to cut it out.

>After you build the wing, but prior to joining the halves together,
>stand the wing on end and trace the outline of the root rib. Position
>the outline of the rib where needed on the fuselage side and cut
>both sides at the same time. If the opening for the wing on the
>fuselage is part way down the taper, prior to finishing the 2nd half
>of the wing, determine where the wing is going to intersect the fuselage.
>If there is no rib there, make a rib to fit this location and use that rib
>to trace your outline. Remember to include the leading/trailing edges
>and any sheeting into/on this dummy rib.


thanks
-Bill
Hope this helps.