i am building an Falconar F9 which is a copy of the Jodel D9. Can anyone help with the loan or sale of a set of drawing for either aeroplane please?
Also on the D9 can anyone advise is the wing fabric stuck on or rib stitched on originally ?
RIP
Falconar F9
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Brian Hope
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Re: Falconar F9
I think you are likely to get a mixed bag of views on this. I'd be surprised if the original D9s didn't have rib stitching as they pre-date the modern fabrics and fabric glues. When ceconite came along, there were those who said rib stitching was no longer necessary, some designers increasing the cap strip width to give the fabric/capstrip glue more area (I don't know if Falconar does this). Others insist that rib stitching is still necessary. I belong to the latter camp, the ballooning of the wing fabric is quite marked and the rib stitching on my Jodel always gave me peace of mind. Good luck with the build.
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mikehallam
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Re: Falconar F9
I agree with Brian,
On the DR1051 the original Dijon construction used top rib stitching only - and that was on linen and dope way back in 1963. The ballooning at fast cruise was quite noticeable.
When recovering it with Ceconite and non-tautening dope my Inspector insisted on top and bottom stitching, i.e. stitches going right through from top to bottom.
He refused to accept Robin's original & I needed his signature, so gave in.
It still ballooned - though a chum in France rebuilt a 1050 and refused to stitch top or bottom, it's still flying but personally when one considers one's long term peace of mind, otherwise the uncertainty of "perhaps" glued fabric peeling off the top surface, then stitching is a relatively short time out of the whole build period & is well spent.
We know it works with thousands of examples in service & over many traditional a/c types.
mike hallam.
On the DR1051 the original Dijon construction used top rib stitching only - and that was on linen and dope way back in 1963. The ballooning at fast cruise was quite noticeable.
When recovering it with Ceconite and non-tautening dope my Inspector insisted on top and bottom stitching, i.e. stitches going right through from top to bottom.
He refused to accept Robin's original & I needed his signature, so gave in.
It still ballooned - though a chum in France rebuilt a 1050 and refused to stitch top or bottom, it's still flying but personally when one considers one's long term peace of mind, otherwise the uncertainty of "perhaps" glued fabric peeling off the top surface, then stitching is a relatively short time out of the whole build period & is well spent.
We know it works with thousands of examples in service & over many traditional a/c types.
mike hallam.
Re: Falconar F9
Hi,
Pete Smoothy at Airworld is retiring, but is still the UK provider of plans and build licences, you will need the latter, not just a copy of the plans. However, there I get confused, you said you are building an F9 but my understanding is that the F9 is not approved in the UK.
On the subject of rib stitching I believe there is an approved scheme for ply strips glued to the ribs on certain Jodels. LAA Engineering is the best place to get the facts on that. Assuming that it is approved, and I have seen it in service, the final choice is yours.
Regards,
Colin
Pete Smoothy at Airworld is retiring, but is still the UK provider of plans and build licences, you will need the latter, not just a copy of the plans. However, there I get confused, you said you are building an F9 but my understanding is that the F9 is not approved in the UK.
On the subject of rib stitching I believe there is an approved scheme for ply strips glued to the ribs on certain Jodels. LAA Engineering is the best place to get the facts on that. Assuming that it is approved, and I have seen it in service, the final choice is yours.
Regards,
Colin
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Colin Cheese
Colin Cheese