I flying a 3-D plane with a YS63 w/ APC 14x4w . The plane will hover but has no reserve to pull away. The engine's RPM is 10,800 so it can handle the prop. I'm wondering if I should go the a prop with more pitch will that give me move acceleration?

What does the airplane weigh? If it's 5.5# or less I'd go with a 13/6apc. If it's more than 5.5 # like 6# or more you need a bigger engine.

The plane is about 4.5 -5 lbs.

At 4.5 - 5 lbs. a YS 63 should hover at ~1/3 throttle. A 14x4w turning 10,800 will yank that weight around like a yo-yo. Check your weight and/or RPM's, something doesn't add up.

Ditto RSands. My YS63 turns a 13/6apc at 10800 on 15% nitro and jerks a 5.5# Pizazz around like a yo-yo. The only reason I haven't used the 14/4 is ground clearance.
But if all else fails try the 13/6

I'm gonna give the 13/6 apc a try. what about a 14/5?

What brand is the 14x4W?

-shaun

APC

With a 14x4 you should be getting over 10lbs of thrust. Either your scale or your tach is bad, but something is not right.

Maybe I need to move my CG back farther. It's just that if the plane falls of the hover with full throttle it's not enough to pull in back on line. The vertical is out of sight. The only problem is while it will hover at half stick , it seams it does'nt have the authority to pull out.

At 4.5 to 5# the YS63 should jerk it back straight with any prop. Try the 13/6 and see how it compares to the 14/4. I agree with the others, either it is heavier than you think or you have an engine problem. It could be your engine is set a little lean and it shows up as lack of power while trying to pull vertical out of a hover.
If you are closer to 6# you are going to have the problem you discribe and the 63 won't be enough to handle it the way you would like.
The only time I've had problems as you discribe with my 5.5# pizazz is at our 1500ft field on a hot day. Pressure altitude of about 5000 to 6000ft.

Which plane is this? Just curious as when you mentioned that it had plenty of vertical but wouldn't pull back straight when falling out of a hover... are you control surfaces large enough or have enough movement. That will also affect hover fall recovery.

I myself am going to check out the 14x4w. I run a Saito 72 with a 13x6 on a 5.5 beefed up Dazzler and it handles it great, but I'm always looking for additional punch to yank around the plane and it hardly needs speed.

-s

Oh, just glanced online. Where are you all buying your 14x4w props? Direct from APC or is there a good supplier for that prop online? Glanced at Tower and a couple others but didn't see it listed.

Thanks!

I got my props from Creek Hobbies.

My YS63 14x4zinger YS bryon20/20 fuel hover my 5 1/4 topcap arf real easy. I was flying mine at set at 10,000RPM. If your not getting enough pull on uplines go down to a 13x4W APC that will help.

Swinging a 14x4W APC at 10,800 should pull at 4.5lb plane out of sight.

MY Saito91 turning 10,800 a 14x4w APC will pull my 7lb + U-Can-DO real good. NOt unlimited vertical but good.

I think what I will do it move the CG back and give it another go.
Thanks for all your reply's.

Funflyer,
CG has nothing to do w/ how much power a motor has to pull out of a hover.

CG does a few things but power is not one of them. Moving the CG will make the plane more responsive, meaning rudder and elevator will be effect flight control, but you complained about not being able to pull out aggressively.

I know that, but my complaint was

"It's just that if the plane falls of the hover with full throttle it's not enough to pull in back on line."

It maybe that I don't have enough control authority to pull it back on line. When I fly straight and level and pull up it goes til it's a dot in the sky. The plane is a Diablotin.

Here is your orignal post. you said you were looking for more acceleration, and has no reserve to pull away. Thus my friend. CG won't help.

What plane are you flying? Because you need alot surface area on the rudder to move the tail back under the nose in a hover. Some planes are more capable to hover than others.

I am trying to help, because I am a funflyer, and have a YS63.