I also had the same problem with my avistar. I'm also using a 10X6 prop. All I had to do was loosen up the collars on the nose wheel and extend the gear lower. This solved the problem. Just don't extend them too much or the gear will pop out of the engine mount if you have a hard landing on the nose gear.

Friends,

What would you guys say about a 11X4 size prop while running an OS 46 FX to slow it down in order to land??

At my field, when the wind is blowing from the east I have to come in over high trees, cut the throttle and swoop downward.

Would the lower pitch help me slow down if the throttle is already cut or should I go with a 11x6.

There's a 10x6 in it now and it's really fast for my beginner landing/flying skills.

root

You're right that a lower pitch should slow it down somewhat at idle, but there won't be a huge difference. Keep your high end needle rich if you try the 11x4; I think it's going to rev the .46 pretty hard. 11x5 might be better.

If the landings are giving you a lot of trouble and you're in the mood to experiment, you could take an idea from another ARF trainer (can anybody post the name?) which uses permanently deployed airbrake type things near the trailing edge root. Just get an experienced flyer to try it out the first time..

I've seen several guys using 11x4 props on .46 engines with good results. My brother's TT46Pro on a Big Stik 40 performed better with APC 11x4 than anything else he tried. A lot of people like 12x4 or 12.25x3.75 props on their .46 engines but my brother never got good results with them on his. Maybe his engine was "weak" but it didn't like the heavier prop loads.

Did you do the tail-dragger conversion?
If so, can you provide specifics about gear, location, etc?
Thanks!

AlexF was thinking of the Nexstar airbrakes but I don't recommend them. I would stay with a 10x6 or 11x4 for good performance and landing speeds. That 8 pitched prop is all wrong IMHO for a trainer and it is going to be pulling too hard at idle and harder to slow down for landing. You could get a longer nose leg if needed like the ones made by Fults, good and strong and take to rough fields well. Variety of lengths available. Then rebend the main gear slightly to match the new height for proper stance.

An 11-4 on a powerfull BB .46 like an OS FX, requires carefull throttle management. At full throttle in level flight it will permit the engine to wind way past its torque peak, which is doing nothing very usefull & is abusing the engine. On the other hand -- when going straight up it is doing what it should !!!!!!

A 10-6 is a break-in prop for a 46 FX & it is just like an 11-4 in engine load, but it will produce less thrust, is not great for vertical performance & is less suited to a trainer than the 11" props. It will let a 46 FX wind its guts out without particularly usefull results.

Prop the engine so that its revs fall in the band between its torque & power peaks (closer to the torque peak is better for a trainer airframe). With a 46 FX, that means an 11-5, 11-6, or 12-4. If you don't have adequate ground clearance for a flat pitch 12" prop, & the 11" prop you need for landing braking won't keep the engine adequately loaded, try an appropriate 11" 3-blade, such as an 11-4 3B.

get bigger wheels

does ur plane prop hit the floor if it is starting>if so u need biger wheels ore a smaller prop
does ur plane prop not hit the floor while trying 2 start it>u need 2 work on leaning the plane backwards and landing because ur going 2 far 4wardshope this helps