I have an ARF Knife. Although I can hover this plane, I cant seem to get it to spin on the prop. I have a TT Pro 46 w/11-4 ASP. Is the secret in the engine prop combo, or ???????

feed in a little aelerons at the start and it should start to go and you have to keep blimping the thorttle and it will help it around!!

If you want to torque roll you'll have to cheat a little with the ailerons. Of course if you use any ailerons what so ever then it's not a torque roll. It's just a stationary vertical aileron roll.

My Knife won't TR at all. It might make a quarter or half rotation and then it will stop and sit there.

Here's my avatar up close.

try adding a little right thrust....a coup washers under the to front engine bolts should help......G

You have to find "perfect vertical". For your Knife, that's just a tad on it's back.

If you try descending a little while hovering, that will definitely help it roll. It's harder to hold the tail under the prop, but it will roll.

If there is wind, you have to be going with the wind. Can't hold it stationary if there is wind and have a torque roll. Has to be NO wind relative to the airplane.

Try an 11.5x4...

Kick in some aileron to cheat.

The real solution is more torque...That means a 4 stroke like a Saito .72 or YS .63.

Gator, I thought you don't bother with that silly aircraft setup stuff.

Your knife should tork roll easily without cheating. you must keep it 90 degrees + or - very little. If it tilts forward or back it kills the roll.

Try backing it down in a tork roll, it will spin so fast it will water your eyes. :stupid:

Jess

Kirk, Jeff Williams is in town, and we are going to fly some this weekend. Give me a call or stop in to find out when. We flew some tonight, but didn't talk about tomorrow. Mine TR's fine with the Saito .72. the bigger prop helps. Tom

put a 12x4 apc on it

I'm getting partial turns but no complete circles, Will try getting another prop to try, We are gaining though..thanks for all the ideas so far, Tom, you guys going to fly Mon. any???

Kirk, we had a good afternoon and evening of flying yesterday. Jeff went home this morning, and I doubt if I fly any. Tom

I have been flying a knife kit all summer, and I am not a good TR at all. everynow and then I can get a full turn. But I got to fly Gators sledge today, and it will TR alot easier than a knife.

Well, I was getting one turn, when all the sudden the darn thing just puts on the breaks, stops dead. but at least I'm gaining. I still have to try the 11-5 as suggested earlier. I'm still thinking that will do something for me..

That's because you've got perfect vertical when it starts rolling, but not when it stops. That is why it stops. You're either falling a little forward, a little back, or a little to the side.

As far as the prop for torque rolls, it really won't make much of a difference for the roll rate. The 11.5x4 will just give you more thrust...

That sounds possible. I'll just have to get better at holding vertical .