Weight DA-50r vs Evolution 58?

[Sevans16]

Does anyone have both engines and know the difference in weight between the engines, with stand-offs and ignition.

[octanehuffer]

Both side by side and equally equiped, the 58 is 12 oz more. Add a pipe to the DA 50 and leave a Pitts on the Evolution. They would be close in weight, but not in power. The Evolution makes alot more power. If you have a plane with over 1420 squares and dont need a cannister, get the Evolution 58. You will not be dissapointed.

[Zeeb]

	Quote: Originally Posted by Sevans16
	Does anyone have both engines and know the difference in weight between the engines, with stand-offs and ignition.

I always get a kick out of guys comparing the 58 to the 50cc class egines, it's actually in with the 60cc class and most of those run a pound more than the DA or ZDZ 50's. As for power, the ones I've seen around here seem comparible to the 60's and that is a bit more than the 50's, certainly not in the same class as a ZDZ 80RV which is just a tad heavier at 4.2lbs. bare vs. just over 4lbs for the 58, and the 80 is also rated at the same 8.5HP that Evolution claims for the 58.

The extra pound on most aircraft rated for 50cc size engines is a real killer around here at 4500' ASL. It just cranks up the wing loading too much for not much power increase.

While I don't have a 58 to weigh as it looks like octanehuffer has, I find it a bit hard to believe that the standoffs/ignition for the DA weighs a 1/4lb. more than the Evolution. You've also got the power for the ignition module issue IIRC they like 3W, want you to run unregulated Li-Ion/Li-Po batteries where the DA says 6 volts input. DA has said that unregulated A123's are okay and those run about the same as a five cell NiCD/NiMH battery.

There have also been reliability issues around here with the Evolution which I understand Horizon has been working to correct, but from what I've seen so far, I'm not impressed with either the 58 or the 116.

[ULTIMATE1]

How about 60CC sized power and lighter than a DA-50 ? BME 58 Extreme Kickass Power in a small light package!!!!!!!!!!!
3LBS 2.4OZS wit muffler and ignition
Attached Thumbnails
Attached Images

[Zeeb]

	Quote: Originally Posted by ULTIMATE1
	How about 60CC sized power and lighter than a DA-50 ? BME 58 Extreme Kickass Power in a small light package!!!!!!!!!!! 3LBS 2.4OZS wit muffler and ignition Attached Thumbnails Attached Images

While weight and performance would indicate it's a better choice, as would have the 366GT and I wish the new owners well, I think I'd wait until we see if the new guys get BME up and running on a stable basis. Who knows maybe they will, but at least with DA or Horizon you know there'll be someone around to support the engine, as opposed to what happened with Keith and now Scott is in bankruptcy....

[Bob S]

Do they still sell the Evolution 58? I thought it got dropped from the line.

[Zeeb]

	Quote: Originally Posted by Bob S
	Do they still sell the Evolution 58? I thought it got dropped from the line.

Hadn't heard that and it is still on Horizon's website although showing backorderd 'til late November.


http://www.horizonhobby.com/Products...odID=EVOE58GX2

[Sevans16]

I was asking this in regaurds to the H9 Carden Yak which calls for a DA 50 but seems to take the 58 quite well as I read on the build thread. I have both here. But my DA is mounted in a plane at the moment. It has 1434 sqin wing according to the box.

[ULTIMATE1]

	Quote: Originally Posted by Zeeb
	While weight and performance would indicate it's a better choice, as would have the 366GT and I wish the new owners well, I think I'd wait until we see if the new guys get BME up and running on a stable basis. Who knows maybe they will, but at least with DA or Horizon you know there'll be someone around to support the engine, as opposed to what happened with Keith and now Scott is in bankruptcy....

Zeeb you obviously are out of the KNOW as BME has had new owners for a while now and have fixed the problem with the BME 115 and service is so good tha a owner of a BME 58 Extreme had a reed valve break and had posted it in the BME 58 Extreme thread and by the time he phone Tom at BME the reeds were already in the mail as Tom had read the post here on F/G and sent off new reeds now you can't beat that for service!!!

[pe reivers]

I don't know how Horizon came to the 8.5 hp power output. I got 7.9 hp at 7900 rpm in a peaky tuned pipe setup with a standard engine. The prosport would be between 8 and 8.5 at 8000 rpm and 22" props, but certainly not at rpm below 7000
benchmark prop 24x10 (mejzlik) at 6900 consumes about 7.0 hp, which is what MVVS advertises for the prosport., and that is also reported by customers. This is in a totally different class than DA50.
6.8 hp is the rating for the standard 58cc engine and 7.2 hp for the liquid cooled, which is based on prosport cylinder design technology.
These numbers are realistic and were reproduced in actual service.
It would be more realistic to compare horsepower per unit of weight, and the ability to run a large propellor, because weight is the price you have to pay in flight characteristics.
The 58 has 3.85 hp per kg and is #10 in the ranking of 127 engines in my database, preferred propellor is 24x10.
DA50 has 3.52 hp per kg, and ranks #21 in my list. propellor of choice is a 23x8

[octanehuffer]

Power to weight is the reason I bought my Evolution's. Its my first contributing factor when deciding to buy an engine. The Evolution/MVVS 58 is a perfect engine for the H9 Yak. Run with a pitts to save weight if you can.

[BTerry]

The MVVS/Evolution 58 will fling around a 19# plane the way a 50cc will toss a 15.5# plane. It will turn about 1.5" - 2" more prop at the same rpm as a good 50cc.

Also the 58 on a pitts will have more power than a 50cc on a cannister at a similar weight.

The BME sure looks fabulous. In fact that engine is so LIGHT it may cause balance problems as most planes are designed for much heavier engines. I hope the new owners are able to keep up with demand after they conclude with their responsibilities in the sand box.