Help! Cub style landing gear STC for Aeronca 7AC
Kelvin Gurney
Does anyone know of one?
Thanks
Bernard Bélisle
David Munday
>I've trying to find a STC for putting cub style landing gear on a Champ.
>Does anyone know of one?
>
Why in hell would you want to do that? The Champ lands so much more
easily than the Cub, and the oleo-strut gear is the reason. The Cub
has *no* appreciable damping in the system.
--
David Munday - mund...@muohio.noise.edu
My email address is not noisy.
Webpage: http://www.nku.edu/~munday
PP-ASEL - Tandem Flybaby Builder - EAA-284 (Waynesville, OH)
"Specialization is for insects" - R. A. Heinlein
Cy Galley
Kelvin Gurney wrote in message ...
>I've trying to find a STC for putting cub style landing gear on a Champ.
>Does anyone know of one?
>
> Thanks
>
>
Kelvin Gurney
Now that being said, it is my understanding that oleo's dampen forces in
the vertical direction better because of the piston action of the oleo's.
While the spring style gear handle horizontal forced better because of
their simplicity (one piece construction).
I am building a small, light "puddle jumper" for use in the Alaskan back
country, One day it will be on floats, but until then it is a wheel rig.
Because of what I intend on using it for, I am willing to trade the comfort
of the oleo's for the assurance that the gear will still be under me after
bouncing over rocks, rootwads, muskkeg, etc. getting to my favorite camping
or fishing or hunting or gazing on the wilderness spot.
David Munday wrote in message <3695e26b...@NEWS.SUPERNEWS.COM>...
>"Kelvin Gurney" <kgu...@knix.net> wrote:
>
>>I've trying to find a STC for putting cub style landing gear on a Champ.
>>Does anyone know of one?
>>
Kelvin Gurney
Bernard Bélisle wrote in message
<4oNe2.262$mn1.66...@news1.mtl.metronet.ca>...
Cy Galley
Champs at Oshkosh in the last 25 years. In fact, a Pacer this year ground
looped and bent the attach points on the fuselage.
Kelvin Gurney wrote in message ...
David Munday
>The standard disclaimer, "I am not an expert!".
> Now that being said, it is my understanding that oleo's dampen forces in
>the vertical direction better because of the piston action of the oleo's.
>While the spring style gear handle horizontal forced better because of
>their simplicity (one piece construction).
> I am building a small, light "puddle jumper" for use in the Alaskan back
>country, One day it will be on floats, but until then it is a wheel rig.
>Because of what I intend on using it for, I am willing to trade the comfort
>of the oleo's for the assurance that the gear will still be under me after
>bouncing over rocks, rootwads, muskkeg, etc. getting to my favorite camping
>or fishing or hunting or gazing on the wilderness spot.
I can see that. The presence of the oleos don't make the gear weaker.
That said, I suppose the Champ gear might be weaker than the Cub gear,
though I think a ground loop will wipe out either type even on a
smooth runway.
If you are talking about smacking something head-on while out in the
bush, both types have much the same sort of triangular arrangement of
members which restrain the wheels from moving fore and aft. The
tubing sizes and the exact geometry may be different. For up-down
motion I think the Cub has a pretty short stroke whether you'd break
one of those bungies first or hurt one of the springs on the champ
style first I couldn't say. The oleo's sure are nice if you can
incorporate them into your design.
Alan
landing a champ anywhere I land my PA11.
David Munday <mund...@muohio.noise.edu> wrote in article
<3695e26b...@NEWS.SUPERNEWS.COM>...
> "Kelvin Gurney" <kgu...@knix.net> wrote:
>
> >I've trying to find a STC for putting cub style landing gear on a Champ.
> >Does anyone know of one?
> >
> Why in hell would you want to do that? The Champ lands so much more
> easily than the Cub, and the oleo-strut gear is the reason. The Cub
> has *no* appreciable damping in the system.
>
wv...@pop.ptld.uswest.net
Alan wrote:
alan/dave,,
dave,, i must agree, i had a J-3 for many years and my best bud flew a 7AC,, we
traded airplanes all the time, and no question that the oleo gear on the champ
was superior to my cub,, anything more than a greaser in the cub had you
bounding for the heavens.,, in the champ you could make darn near an assault
landing and those oleo's nulled out the recoil and "sticking" the airplane on
grass or hard surface,,, the champ made most landings look and feel like a
"10",,,,, dave,, have come across your tandem fly-baby project on a few flybaby
sites including ron wattanaja (sp) ,, i have a flybaby myself and have torn it
down for a winter rebuild,, aircraft named "mayday",, the airplane is a pure
gas to fly,, one friend that has flown it likened the experience to flying a
harley-davidson,, incidentally, the flybaby runs the same 400 turf tire i used
on the cub but without any dampening except deflating the tires,, to tell you
the truth, i don't see much difference in shock absorption between the cub with
bungees and the flybaby with nothing!
best wishes,,,
"wheatfield" vic
David Munday
>dave,, have come across your tandem fly-baby project on a few flybaby
>sites including ron wattanaja (sp) ,, i have a flybaby myself and have torn it
>down for a winter rebuild,, aircraft named "mayday",, the airplane is a pure
>gas to fly,, one friend that has flown it likened the experience to flying a
>harley-davidson,, incidentally, the flybaby runs the same 400 turf tire i used
>on the cub but without any dampening except deflating the tires,, to tell you
>the truth, i don't see much difference in shock absorption between the cub with
>bungees and the flybaby with nothing!
The closest I've come is fast-taxi in a flybaby. That was pretty much
how I felt. In the Cub the tires must be taking most of the flex
anyway. I hope you get your plane back in the air without much
trouble.
Alan
what Im saying is for rough fields etc, the champ gear wont hold up. Put
skis on a champ and see how long the gear stays on. As far as the cub gear
being to stiff, just put on bigger and softer tires.
wv...@pop.ptld.uswest.net wrote in article
<368300F4...@pop.ptld.uswest.net>...
>
>
> Alan wrote:
>
> > A champ gear is OK if you just land at airports, I wouldn't consider
> > landing a champ anywhere I land my PA11.
> >
> > David Munday <mund...@muohio.noise.edu> wrote in article
> > <3695e26b...@NEWS.SUPERNEWS.COM>...
> > > "Kelvin Gurney" <kgu...@knix.net> wrote:
> > >
> > > >I've trying to find a STC for putting cub style landing gear on a
Champ.
> > > >Does anyone know of one?
> > > >
> > > Why in hell would you want to do that? The Champ lands so much more
> > > easily than the Cub, and the oleo-strut gear is the reason. The Cub
> > > has *no* appreciable damping in the system.
> > >
> > > --
> > > David Munday - mund...@muohio.noise.edu
> > > My email address is not noisy.
> > > Webpage: http://www.nku.edu/~munday
> > > PP-ASEL - Tandem Flybaby Builder - EAA-284 (Waynesville, OH)
> > > "Specialization is for insects" - R. A. Heinlein
> > >
>
> alan/dave,,
> dave,, i must agree, i had a J-3 for many years and my best bud flew a
7AC,, we
> traded airplanes all the time, and no question that the oleo gear on the
champ
> was superior to my cub,, anything more than a greaser in the cub had you
> bounding for the heavens.,, in the champ you could make darn near an
assault
> landing and those oleo's nulled out the recoil and "sticking" the
airplane on
> grass or hard surface,,, the champ made most landings look and feel like
a
> "10",,,,, dave,, have come across your tandem fly-baby project on a few
flybaby
> sites including ron wattanaja (sp) ,, i have a flybaby myself and have
torn it
> down for a winter rebuild,, aircraft named "mayday",, the airplane is a
pure
> gas to fly,, one friend that has flown it likened the experience to
flying a
> harley-davidson,, incidentally, the flybaby runs the same 400 turf tire i
used
> on the cub but without any dampening except deflating the tires,, to tell
you
> the truth, i don't see much difference in shock absorption between the
cub with
> bungees and the flybaby with nothing!
>
> best wishes,,,
> "wheatfield" vic
>
>
>
fa...@acsip.com
"Alan" <ka...@mcn.net> wrote:
> I dont deny that you can crash land a chimp oops champ and not notice it,
> what Im saying is for rough fields etc, the champ gear wont hold up. Put
> skis on a champ and see how long the gear stays on. As far as the cub gear
> being to stiff, just put on bigger and softer tires.
point taken!,,especially on skis?,, but for ten or so years we
flew both planes from gravel bars to hard surface, and the 7AC didn't seem
any worse for wear than the J-3. perhaps it's something to pay closer
attention to.
"wheatfield" vic
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