Biplane will not knife edge
Nova
Yesterday, several attempts at knife edge flight with the Sig
Hogbipe. Rolled to right side, kick in left rudder and it would
be in knife edge stance for like a second, then it would like..
jump up and roll back left. looked like an outside snap roll to
left. Never had that happen before, what the heck is going on
here? Bottom wing has 1/4 degree negative incedence, top has
1/2 deg. negative in relation to horiz. stab. Saito 91 for
power. Climbs too much with advancing throttle, but thats
another problem i think i can fix with more downthrust. But the
knifedge thing has me confused. Can someone help me on this?
Wayne
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Don Hatten
roll it in the direction of the yaw. It amounts to a barrel roll, could
be what you interpret as a snap.
Nova wrote:
--
****************************
Don Hatten AMA SOARDOG
Galena, Alaska KE6TJG
USHGA 17442
http://www.freerepublic.com
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Nova
>How much dihedral is in a Hogbipe? Yaw input with a large
dihedral will
>roll it in the direction of the yaw. It amounts to a barrel
roll, could
>be what you interpret as a snap.
Hello Don,
The Hogbipe has 6 degrees Total dihedral in bottom wing, top
wing is flat. And yes your right, big fast barrel roll. hummmmm..
Thanks for your reply.
Wayne Eads
Ardmore, Oklahoma
CurtD
lower wing, wing incidence, decalage between wings and stabilizer, position
of thrust line, and several other factors. If you want to knife edge without
three control inputs (rudder + ail. to stop roll + elev to stop pitch)
you'll need a radio that has three axis mixing like the JR8103. It takes
some trail and error but it can be done. Took me about seven flights to get
mine to knife edge with only rudder.
Nova <weadsN...@brightok.net.invalid> wrote in message
news:139dd38f...@usw-ex0104-025.remarq.com...
> Hello All,
> Yesterday, several attempts at knife edge flight with the Sig
> Hogbipe. Rolled to right side, kick in left rudder and it would
> be in knife edge stance for like a second, then it would like..
> jump up and roll back left. looked like an outside snap roll to
> left. Never had that happen before, what the heck is going on
> here? Bottom wing has 1/4 degree negative incedence, top has
> 1/2 deg. negative in relation to horiz. stab. Saito 91 for
> power. Climbs too much with advancing throttle, but thats
> another problem i think i can fix with more downthrust. But the
> knifedge thing has me confused. Can someone help me on this?
>
> Wayne
>
>
Nova
>The Hogbipe has both roll and pitch coupling with rudder due to
dihedral in
>lower wing, wing incidence, decalage between wings and
stabilizer, position
>of thrust line, and several other factors. If you want to knife
edge without
>three control inputs (rudder + ail. to stop roll + elev to stop
pitch)
>you'll need a radio that has three axis mixing like the JR8103.
It takes
>some trail and error but it can be done. Took me about seven
flights to get
>mine to knife edge with only rudder.
Curt,
Thanks for the info. I'm flying the hogbipe with a J.R. xp652,
and with only 5 flights the radio and plane are both new to me.
The radio has three programable mixes capability. I guess it
would be too much to ask for some starting points on the mixing?
The plane is fun, and lands real nice.
Thanks again.