Full length super cub wings on a sort wing piper

[rdsaviation]

Hello all,

Im considering building a pacer with full size super cub wings. I dont want to streach the fusalage as im pleased with how my current pa 22-20 handles. Has anyone seen this done before? Other than possible tail authority issues could this be rectified with larger tail surface areas. Or am i missing somthing?

Thanks for the help

[Stephen]

Yes!

The difference between the center of lift and CG creates a pitching moment. This pitching moment is offset by the tail. increasing the wing span increases lift. Greater lift will increase this moment tendency. you will need a longer lever arm to offset this increased moment. longer wing span usually needs a longer fuselage.

I am currently building a Super Pacer (Bushmaster) SC wings and 22 inches longer fuselage.

[pistoncan]

Stephen, well said

Yes!

The difference between the center of lift and CG creates a pitching moment. This pitching moment is offset by the tail. increasing the wing span increases lift. Greater lift will increase this moment tendency. you will need a longer lever arm to offset this increased moment. longer wing span usually needs a longer fuselage.

I am currently building a Super Pacer (Bushmaster) SC wings and 22 inches longer fuselage.

[SMO22]

I dont think it would create an unstable plane, Ive flown Super Cubs with each wing lengthened 3' and foam cuffs rivited to the leading edge along with droop tips, tail was not modified, flew nice. Never flown a shortwing with an extened wing though. I bet somebody has.

[SMO22]

The Plane Booster droop tip STC removes the bow tip and adds an extra rib and than a droop tip, my total span is right around 30' and flys great. Im not sure what the 18 span is.

[rdsaviation]

Thanks for the help sofar.

A super cub has a span of 35'2.5'' and a pacer has a span of 29'3''.

I have added art win extentions and a sportsman cuff to a 180 total of roughly 24 inches longer per side with the sportsman tip and the costomer was very pleased.

What is the longest wing that you have seen on a pacer.

[pistoncan]

I have been told that 18" per side is the longest you can safely go without changing the lift struts.

Thanks for the help sofar.

A super cub has a span of 35'2.5'' and a pacer has a span of 29'3''.

I have added art win extentions and a sportsman cuff to a 180 total of roughly 24 inches longer per side with the sportsman tip and the costomer was very pleased.

What is the longest wing that you have seen on a pacer.

[PACERGUY]

Things that come to mind.

Are you going to have square tips or round ones? Are you going to push the aileron/flaps out? I have heard lots of complaints of extended cub wings having slower handling issues especially without moving controls out. I am sure Eddy Trimmer has the math to tell you how far out you could go with stock struts. You could do cub type as on the bushmaster. I think pacers handle much better in the air than a cub (quicker response), but bigger wings may effect that (more cub like) and make it much more susceptible to wind gusts/turbulence. I think one thing that would help a lot without much downside is a set of Doug Keller flaps. Figure out max length for stock struts, push aileron out to end of squared wing, and fill the rest with Keller flaps.

A bigger size tail would be a great ideal. A cub tail on a stock pacer makes a big difference you could even go a bit larger (Attlee Dodge) all bolt on stuff. You could do the wings and tail first. If it is not working the way you like it extend the fuselage later.

No right or wrong just some stuff to think about.
DENNY

[rdsaviation]

I like the squard wing and I have been looking at the cross wind stol wing tips but not to sure at this point. I would move alerions out board and extend the flaps to fill the gap. Waynes slats and keller flaps would make a great wing. I was planning to use super cub leng struts with jury struts to support the longer wings. The larger tail surfaces would help with tail authority.

Thanks

[Stephen]

I like the squard wing and I have been looking at the cross wind stol wing tips but not to sure at this point. I would move alerions out board and extend the flaps to fill the gap. Waynes slats and keller flaps would make a great wing. I was planning to use super cub leng struts with jury struts to support the longer wings. The larger tail surfaces would help with tail authority.

Thanks

Cross winds mods are STC'd. Moving the ailerons out is not, which means experimental. I have worked 5 years on an STC to move ailerons and enlarge flaps, Eddie has worked even longer with no success. An STC can be done but would take tens of thousands of dollars. I am going with the Bushmaster STC.