U-Can-Do .46 flat spin
 

Hi,
A friend doing a flat spin with a U-Can-Do .60, w/ 1.20 4 stroke, couldn't get it out and pancaked into the ground. He says that the rudder did nothing and he was too low to do much else. Anyone experienced with spins in these?
Thanks.
Bob

RE: U-Can-Do .46 flat spin
 

new maneuver in a new plane, always a couple mistakes high.

RE: U-Can-Do .46 flat spin
 

Yeah you gotta get out a little higher. Gotta center the sticks. Opposite rudder will shake it loose if it's stuck. Keep power on. He needs to practice getting out up high and get closer to the deck later.

Joe

RE: U-Can-Do .46 flat spin
 

Hi,
Apparently, the rudder did not do much. I wonder if he had enough throttle.
I guess, at this point, I'm asking whether they flat spin o.k. and inverted ones too.
I have a saito 100 and was thinking of the .46 size plane; it has huge wing area and thetail could be braced. Any info re knife edge coupling, or whatever, would certainly be appreciated.,
Thanks,Bob

RE: U-Can-Do .46 flat spin
 

Saito 100? A guy in anopther thread just pulled his fire wall off a brand new one with a 60 2 stroke. I'd strengthen the firewall.

RE: U-Can-Do .46 flat spin
 

Hi Joe,
Yes, I'd strengthen the firewall. 'Surprised that a .60 would do that; do you know whether the firewall is plywood with glueblocks around the edges?
Thanks for your comments.
Bob

RE: U-Can-Do .46 flat spin
 

Big engine on front, with a CG a bit far to the aft side (as most 3D'ers setup) will make
things take a bit longer to get out of a flat spin. There's so much weight at each end that
you start fighting centrifugal force on top of everything else. (Or is that centripetal force, physics guys? :) )

At any rate, definitely agree with the above comments on starting out higher until you see what's needed
to pull the plane out of that flight condition. Some planes will come out on their own in a couple spins, just
by centering the sticks. Some require flying it back into a "normal" spin, then recovering from there.
Some will come out with just a burst of thrust and opposite rudder.

A lot of planes just tighten up and spin faster, the more throttle you give it :D

RE: U-Can-Do .46 flat spin
 

I think you mean "angular momentum." I KNEW that mechanical engineering degree would come in handy someday!

-Greg

RE: U-Can-Do .46 flat spin
 

Simply put most planes loose on this one.

RE: U-Can-Do .46 flat spin
 

It will flat spin upright or inverted and fly out flat and level. To get out just apply full power, and neutral the rudder and ailerons, then slowly back off the elevator as needed.

Ed M.