BME

Ok hold on I will get you some pics asap. The pics will be of the final prototype but production versions will be a little nicer looking. We may also offer it in a rear induction version for the scale guys.

Keith
BME

jongurley

My Feedback: (29)

Sounds good Keith,, to be frankly honest, ,I am about to buy a DA50r (as in the next week) but if the pics of your 55 extreme look good,I will hold off,, and what should it weigh keith ready to fly,less prop,,,, thanks,,

JoeAirPort

My Feedback: (41)

34-36 ounces: I thought that was a typo. That's a pound+ less than the lightest gassers out there. This means that on some ARF's elevator servos can't go in the tail. Also gotta move that engine way out up front to balance. I guess those are nice problems to have. No different than the BME 110.

But people could use this engine in place of a Moki 2.10 and avoid glow. Also they would have tons more power. So maybe this is a good engine for 72-80 inch planes (as well as 80-87).

BME

Jon, The engine weighs 34-36 ounces. That is everything minus only the ignition and muffler. The ignition weighs 3 ounces. Mufflers will weigh 4 ounces and up depending on the application. The engine runs great with idle rpm as low as 800 and silk smooth. If you are in a hurry you may want to go ahead and buy the DA.

Keith
BME

jongurley

My Feedback: (29)

Well Keith its one for those things,, I look at it now as I could wait 2 1/2-3 months,It might be worth it,,("The best things come for those who wait"),, I will think on it this week and maybe I can see some pics that will persuad me,, try and get those pics for me and everyone Keith, and I appreciatte your honesty[sm=thumbup.gif],,,, Jonathan

Hans Meij

Oh, then perhaps a rear exhaust version for the pattern guys

coronabob

My Feedback: (10)

What? 800 rpm? That's insane. At that speed, one can SEE the blades move especially a 20 to 22 incher. Silky smooth at 800 rpm? I've got to see it to believe it.

Dork Driver

My Feedback: (6)

What kind of HP are we talking about here?- I'm looking for a plane for the evo 58 and I'll take the weight difference if the HP is over 5.7 ( ZDZ 50NG) Looks are but a lightswitch away- wingloading you have to live with to the end of time (the plane's time that is)

Bosshossv8

My Feedback: (10)

rear crankcase induction (reed), standoff mounted , side exhaust.....fits the bill. With a drilled hub (DA style) that won't slip. I have seen way too many bent spinners and almost accidents with non drilled hubs. THat is one of my main complaints of the BME 50. I know the non drilled is easier for the newbies, and when tightened correctly works fine, but the drilled type is safer. period.


It would be nice to have two dirt bike style 50cc race motors to choose from. You always seem to have to decide between the evils of all the motors when making a choice. That needs to be fixed. There are so many nice ARFS out there , there needs to be more than 1 or 2 premium race motors to choose from. A lot of the motors are journeyman style , workhorses, not thoroughbreds.

I will be looking hard at this one , next seasons ARF's need better choices.

jongurley

My Feedback: (29)

Pictures,,,

BME

The BME 55 is the most powerful and lightest engine in the 50cc class. The pics are of the prototype so the mount will change and we may offer a rear induction version also. The prop hub can be used as a single,two,three,four or six bolt configuration. The center boss is 10mm and the bolt pattern is the same as 3W and DA. The crankshaft was carefully balanced using tungsten for optimum performance and low vibration.

Thank you
Keith
BME

BME

More pics.

Keith

Ed Vollmer

My Feedback: (14)

That is a nice looking engine, Keith!

Is there any way to make it a rear intake AND rear exhaust? That would make it ideal for a pipe.

Will you have a header available?

Can you provide the dimensions? Mounting surface to end of the prop hub? C/L of crank to top of head and to the tip of plug cap?

Perhaps I missed it previously but, what is the price?

Can I get it without the ignition?

Ed

BME

Thanks Ed. There is no way of making it a rear exhaust without casting a new cylinder. K&S makes headers for the engine and we will be stocking them. Firewall to spinner backplate is 4.75 inches. Center of crank to top of head is 4.5 inches. Center of crank to plug cap is 5&1/8 inches. Intro price will probably be around 525.00 to 550.00. That should make it the lightest, strongest and most affordable.

Keith
BME

Hans Meij

Is this an option, because the competition is not that much in this field.
Have tried a ZDZ40RE and the new Brison/Revolution52 (both rear exhaust). I did not like them.
Both have a to high vibration level. I expect due to the high compression ratio they use.
The ZDZ40RE also does not have the power.

marzo91

My Feedback: (57)

Soooo,
When are you starting the list? Will they be ready before April? Are they smooth, vibration-wise? Are there currently Pitts style mufflers availible? Thanks for your response.

jongurley

My Feedback: (29)

That looks awesome Keith,, did you say you would be offering a rear induction,,,

BME

Yes, we are looking at a rear induction version. As for vibration the crank is balanced to the point it could not be any better. With any single cylinder engine there will be vibration and the bigger the engine the more vibration it will have. We used a vibration meter and adjusted the crankshaft counterweight until the smoothest readings were obtained for the rpm range. I never realized how much the prop has to do with vibration. I am not speaking about out of balance props or rpm differences but out of all the props tested the Menz 24x8 is by far the smoothest at 6500 rpm.

Keith

BME

We have starting an order list. If you are interested please leave us your name and a phone number.
The current mufflers for the 44 and 50cc engine also fit this engine but performance may be down a tiny bit. We tested the engine with what we call our profile muffler for the 44 and 50. It is the same as our 110 muffler.


Keith
BME

Antique

My Feedback: (4)

OK, in plain English...
Keith has just made an engine that will outdo anything else sold so far in its weight and price range...
My Japanese Zenoah 4 lb G62 has been outdone by a 2 lb Japanese Echo...
Hail Keith and Echo

DKjens

My Feedback: (50)

Keith,
The engine looks really good, still amazed at the low weight. Can you co-operate on whether it has a cantilever crank shaft or does it have a rear crank shaft bearing?

Jens

Antique

My Feedback: (4)

He already did somewhere, cantilever....
Most engines with a rear carb are cantilever, whether reed or rotary valve...3W is an exception. 3W engines have a bearing small enough on the rear to have room for the reed valve...

torqmeister

I have a couple of planes for this ingine. I am pumped!

Bosshossv8

My Feedback: (10)

Is it a rotary or reed motor?


An d Keith,

this motor looks great, but you posted " it may be down on power with the 110 muffler" , is there a muffler for full power, a new one? Or are you just reffering to the pipe?

6500 of 24x8 Menz is impressive, it got to wicked.

Crash90

My Feedback: (17)

I think you misread. I think he said that power may be down with the 45 and 50CC muffler and that their tests were actually done with their "profile" muffler. I gather that full power is recognized with the "profile" muffler which appears to be the same as the 110 muffler.