I own a BME 50 and have been pondering the question really how much more power if any does a zenoah G62 have than a BME 50. Both recomend a 22x10. I don't know real life RPM's on the zenoah, so I want to know from someone who has experience w/both.

Thanks

A good G62 will turn a 22-10 Zinger about 7000 rpm without the muffler....

22X10 Menz turning 7000 with a muffler is what I've been hearing about the BME 50....

Mine is still breaking in, so I don't know what it will do quite yet.

Yes, but dont kid yourself. Swinging a 22x10 Zinger is not like swinging the 22x10 Menz. If you go the inexpensive route(like me) try the 20x8-14 on the 62. Try to get in the mid 7000 range on the ground.

I have not used a Menz prop as yet. Does the Menz load the engine down more than a Zinger of the same size?

Artisan-- the new Zinger Pro series load differently -compared with the older , std Zingers -- In actual practice , the Zinger PRO 22x8 is not even a heavy load on a ZDZ40!
We ran some heads up prop comparisons on a ZDZ40(Pitts muffler - no tuning) in a H9 72" CAP-
We new the model very well and had flown it thru all of the IMAC Unlimited stuff.
The Zinger PRO 22x10 and the MenzS 22x8 flew about the same -- with the Menz loading the engine -on the ground -a bit more -
This is not an endosement of engines or props - just noting that there is a huge difference in props .
The 22x8 Zinger was a faster revving setup -but overall performance suffered.
FWIW my new 50 ZDZ turns the 22x10 MenzS props a bit under 7000 - new engine - and at 4300 ft altitude.
Any good, modern fifty should do this --

Thanks, Dick. Much appreciated.

I was not aware that they ran a menz, but I saw they were only pulling 7000 RPM. I haven't tached mine, but the BME 50's are supposed to be swinging a 22x10 at arround 7200. A menz S 22x 10 is about equal to a standard width 23x10 so with a standard width 22x10 on the G62 should put it pretty close to that. so I am wondering if the G62 is really more powerful or not.
I could run numbers all day long (and probably still be wrong) but I have never held a G62 to be able to accuratly tell.
Thanks again!

These are the readings I get on my G-62.
Don´t know how they compare to "wood" props though.

APC 22x10 7400rpm
APC 24x8 7100rpm

The comparison of the G62 -power to weight with newer designs shows that the state of the art has improved.
A newer 50 - bare engine aprox 3 lbs -vs the G62 -bare weight 4 lbs -
3/4=a 25% weight reduction with newer designs - and the power - for practical purposes, is as good or better - some will refute this -but I tried to get max usable power from my G62 - (for aerobatic model) and was not satisfied - the results were more vibration and weight than I found acceptable.

Well my thinking is with reguards to the new aeroworks 31% edge.My 29% weighs 16lbs dry. I hang it at somewhere around 3rd throttle. If this 31 % is 16-18 lbs then actual weight should be around 19lbs, so a G62 should give it close to a 3D power curve, but with a penalty to wing loading, so If a BME 50 and a G62 are close on power you'd be better off with the 50 to lighten wing loading, plus the plane would weigh less which would make up for the small power difference if any.Does this sound logical? like I said I just don't know how much power a G62 really has.

Thanks again.

Now that we have finally gotten around to the application, the wing loading scenario is correct. If it were a warbird where you need the weight in the nose just to balance, then the G62 would be the way to go.

Go with the BME 50 for your application.

On a 19 lb.Edge you will need more than a BMW 50 for 3D flying.I'd use a ZDZ 60,Brison or Taurus 4.2 .A 50 cc engine is OK on 14-17 LB. plane for 3D.
BTW,what engine is on the 29%?

My 29% has the BME 50. I was just thinking about maybe getting the 31 percent for a back up to the 29% and was thinking that with the BME the plane could come in at 16 LBS as advertised which is the same weight as my 29%.

BME is coming out with a new 55 Xtreme. It is only supposed to weigh about 2.5 lbs. Should have the power of many of the 60 class and some of the 70s. I think this would truely make an excellent 18 to 19 pound plane......as long as it lives up to what Keith has been telling me.

I've been flying a Giant Stinger with a G-62 on it for a season now. Weight is 19 lb. Started out with the Zinger 22 x 6-10 prop and went to the Mejzlik 22 x 10 and never looked back. Much better vertical. I'm swinging the Mejzlik at 7700 with a B&B muffler, velocity stack, and no spring starter. My engine weight is 5 lb. 1 oz. firwall ready, no prop or spinner. In my opion, 19 lbs is about max for this engine. I can hover on a 90 degree + day and gently pull out of the hover. It shoots out pretty good when it's 60 out. I've got close to 90 hours on this plane now and never a dead stick. That's what's nice about the Zenoah's.