bzyguy01

Can anyone tell me from experience which prop I should use on my 33% Edge 540 Hanger 9 Model with a Zenoah G62? I plan on some aerobatics but not Hovering. Any input will help.
Shayne

Nogyro

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I really like the NX 22x10 (over a Mejzlik, Menz, or Bolly wood) on my G62/Wild Hare combo.....Another guy I know likes his Xoar 23x8. I've tried other 23x8 brand props, and they were just a bit slow for my taste. With that said, prop the G62 to get 7,000 rpm + on the ground, and you'll be in good shape. You won't hurt this engine if it turns 8,000.......

Antique

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Or more

bzyguy01

Thanks Guys. I'm gonna play around with it tonight.

Rcpilot

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Wanna REALLY play around?

Put a header and tuned pipe on it and you'll be swinging a 23-10 at 7300+ [sm=lol.gif] You can get it from Macs. Same guys that make the little black tuned mufflers for the glow engines. Macs makes 3 different lengths for the header. Depends on how much side clearence you need to get it out of the cowl.

I'm probably going to put one of these in a 30% Extra 300L this spring. My original intent was to put a GT-80 twin in the plane, but as much as I love the motor, it's just too heavy and can't be seriously lightened enough to make a difference. Then I was going to put a 3W-80XI in the plane, but I ended up selling it to a friend who has a 31% ready to go and he needed it right now.

I am really confident that if I send the G-62 to Ralph and have him lighten it as much as humanly possible--and then put on a tuned pipe, I'll have a nice combo. It might not hover or 3D with that engine. The plane is supposed to weigh about 17--19 pounds. But, it should be an excellent pattern plane for lower levels of IMAC.

Nogyro

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A stock G62 will hover that weight. As long as it doesn't go over 20 lb. with the tuned pipe on it, you'll have lots of fun.

Rcpilot

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Yeah, but I'm down about 15%--20% thrust up here at 5973' above sea level. []

jbflier

APC 22x8 or 22x10 at 800' sea level has worked well for my type of sport flying with G-62's.......[8D]

BAS

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I use a MSC 22/8 on my rc ignitions g 62 on ign.from Ralph C works very well with good downline braking and pulls like a stump. I have it on a Wildhare 29% Ultimate bibe.

3D Joy

I hovered a 22.5 lbs plane with a stock G62 with in cowl muffler. Don't remember the prop but I do remember it was full throttle all time.

18 lbs with a good tuned 62 must be quite fun IMO.

rmh

FWIW- these are engines designed with revs in mind- they are relatively short stroke -which means - they can turn a LOT faster than some other designs - simply because the piston speed stays low
Said another way- if a ZDZ60 is turning 8000 rpm the piston is sliding much faster than a G 62 at same rpm.
The cranks are going around at the same speed
Bottom line -- to get same horsepower the g 62 must turn faster -which is no problem for them .
To get the same torque at the same rpm --is a trick--
The same size engine does not mean they both are intended to run in same rpm band.
A well matched pipe setup will increase torque on either engine
My 80 J will turn 27x10 at 6600- piped - without the pipe - a 26x10 turns about the same
The torque increase is very substantial-and it works on ANY 2 stroke.
Just be sure you know what you want the pipe to do (what rpm band you want to be in)

Rcpilot

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I was hoping you'd chime in about the tuned pipe Dick. I've put a Macs header and pipe on one of these in the past. All I can say is WOW!!

I don't necessarily want max RPM. It's the smooth power over the entire RPM range that I'm after. I don't know if you can do that. I have heard that a longer header will deliver the smooth power over a broad range and the short header pipe is what makes the peaky HP on the top end. Is that right?

rmh

long broad banded pipe can actually allow you to run larger props at higher than open stack rpm- I do it on my engines