RE: Echo BME twin
 

The other thing that I forgot to mention when writing this is that the weld in the center shouldn't throw the balance off while welding out at the pins probably will....

In any case, mine runs incredibly smooth.

How's everyone else doing with their twins??

AV8TOR

RE: Echo BME twin
 

A company called Gen Engineering in Japan made a twin MANY years go using 2 G62 cylinders, cranks, carbs, and ignition coils...It had the same bolt pattern as the 62 single and was made to be used as a power unit for ultralights and paragliders...The company showed some of the engines at Oshkosh and even had some brochures printed...I bought one of the engines from a customer who picked it up in Canada...The importer was located in California, and when I called him to get info we couldn't communicate very well, he spoke broken English and I spoke no Japanese...The price was to be about $1500, which was high at the time....The engine I had ran very well, but I loaned it to a "friend" and it has since disappered...I still have the original mount that was on it..It predated most all of the big twins now being sold...20/20 hind sight sure is great [&o]
Tomyrc is on to something here, he sent me a picture of the 62cc cylinders...They look very good...If the quality is anything like the appearance he will dominate the twin cylinder market with this one, as the price will be much lower than anything else around...
Wish I was the dealer :eek:
FWIW, the stud on the end of the crank is a great copy of the one on all 3w engines...:D

RE: Echo BME twin
 

Hey, welcome back Ralph! Where've you been??

AV8TOR

RE: Echo BME twin
 

Went Giant Scale racing in Illinois, our Rare Bear took 4th in Gold..Stopped at the Indy Race Museum on the way home, stopped at the Strategic Air and Space Museum in Ashland, Nebraska...A Blackbird and Titan rocket outside, a B36, British Canberra, C119 and more inside.....Found another museum outside Lincoln, Nebraska, Museum of American Speed,
loaded with old speed equipment and other car stuff...Highly recommended for anyone in the area...We're going through the Dayton museum on the way home from the races in August...:D

RE: Echo BME twin
 

RCIGN1: Sounds like you guys are Having fun!!! If you stop to the Dayton Air museum....plan on a all day thing to see it all. It is neat. Best Regards Capt,n P.S. Good Racing!;)

RE: Echo BME twin
 

Sounds like a good time all right! Congrats, and welcome back again.

AV8TOR

RE: Echo BME twin
 

DOES ANYONE HAVE ANY OF THE CRANKCASES LEFT THAT THEY WANT TO SELL?

RE: Echo BME twin
 

THANKS FOR THE PARTS TIM,IF ANYBODY HAS SOME MORE CRANKCASE THEY WANT TO SELL PLEASE LET ME KNOW

RE: Echo BME twin
 

Hey no problem. Looks great. You guys work fast too, wish I could get back to it. Getting the shop just about finished and ready to go has been a long ordeal but I am down to lubing the machines up and I will be ready to make some chips again.

RE: Echo BME twin
 

WELL TIM I WOULD HAVE HAD IT RUNING TODAY BUT I WAS USING A DULL TAP AND BROKE IT IN MY PROP HUB SO I HAD TO MAKE ANOTHER HUB....WELL MAYBE OVER THE WEEKEND
JOE

RE: Echo BME twin
 

Now that will ruin a days work in a hurry. Looks like someone deleted the last few posts. HMMMM. Why?? [:o]

RE: Echo BME twin
 

I GUESS YOU ARE NOT SUPPOSE TO ASK IF SOME HAS SOMETHING FOR SALE,YOU HAVE TO RUN A WANTED ADD....SO THEY DELETED MY LAST POST.[:@]

RE: Echo BME twin
 

Yeah, as far as I'm concerned the moderators are too strict about that. We should do a poll and see what the forum users really want.

AV8TOR

RE: Echo BME twin
 

Would it really matter?

RE: Echo BME twin
 

For God sake people all he did was ask if anyone had any for sale. Not like I responded on the forum, I sent him a PM!! Then all he did was say thanks on the forum. Whats the big deal with that. Please Mr. Moderator come out of the closet and tell us what we did wrong don't just wack a post as it really screws up the continuity of the thread.

RE: Echo BME twin
 

WELL I GOT IT RUNING.IT STILL NEED SOME TUNING AND ANOTHER IGNITION . I MADE THIS ONE AND IT WAS FOR A SINGLE,SO I ADDED ANOTHER CAPACITOR AND COIL TO START THE TWIN AND IT BREAKS DOWN HERE AND THERE.I HAVENT CHECKED THE RPMS YET BUT IT WILL SURE IDLE AT A LOW RPM.I HAVE A 22-8 BAMBULA PROP ON IT......HERES A LINK TO A VIDEO .DONT MIND MY TEST STAND THIS IS ONE OF MY BETTER ONES
http://www.rcuvideos.com/user/W4GZVBJFZJJQBG3M

RE: Echo BME twin
 

Jlew,

That twin looks great! Outstanding job.
Did you do the welding to set up and join the crank?

Thanks

RE: Echo BME twin
 

THANKS
YEA,I WANTED TO WELD IT MYSELF BECAUSE OWNCE I GOT IT ALIGHNED I PUT IT BACK IN THE LATHE AND INDICATED BOTH ENDS OF THE SHAFTS IN , COVERED EVERYTHING UP AND WELDED IT WHILE IT WAS STILL BETWEEN THE CENTERS.

RE: Echo BME twin
 

heres another video of a twin I made out of two 26 cc weed eater engines
http://www.rcuvideos.com/item/582SSDJ4MFXKMYTQ
HERES AN UPDATED VIDEO
http://www.rcuvideos.com/item/BK9LTWG319N5JL83

RE: Echo BME twin
 

Nice work! Have you got any more details and pics?

AV8TOR

RE: Echo BME twin
 

THANKS , IM GOIN TO TAKE IT BACK APART TO DO SOME COSMETIC WORK TO THE BLOCK AND I WILL POST SOME PICS OF THE ENGINE.

RE: Echo BME twin
 

Well, after a looonng break, I finally got back to my little BME twin 23.6cc engine. I mounted it on my Giant Stik. It took the place of the Gas/Glow Poulan 42cc I had been flying on the Stik. The twin, with it's back plate mount and prop adapter, weighed within 1/2 ounce of the Poulan 42cc with it's rail mounts and prop adapter. That was kind of surprising.

Anyway, what a sweet engine and a great combo. It flies great!!! The engine has a great sound, and is extremely smooth and responsive. Looks great on there too! Sorry, but my camera went FUBAR, so no pics. Got a new camera coming....

It has only about 3 tanks of fuel through it so far, so it is still breaking in. I'm presently running an APC 18 x 8 on it and it turns 8000. I imagine when it breaks in and I fine tune it, it will turn about 8300 with that prop. I did briefly try a 20 x 10 on the test stand, and it turned that at 6800. It's amazing how smooth the engine is compared to a single. I really like it. Even though a good single would have more power, it still flies at 1/3 throttle and has basically unlimited vertical, so that will work as far as power....

BTW, I'm running it on Gas/Glow without onboard glow power. Works perfect, idles slow and smooth, starts easy, etc.

AV8TOR

RE: Echo BME twin
 

I'm looking at a Giant Stick to hang my twin on also.

How does it balance? Did you add any weight?

RE: Echo BME twin
 

Great Planes has two balance points for the plane. One listed in the manual, and a revised C.G. that is quite a bit farther forward. With the twin cylinder engine, a smoke system, and heavy duty servos mounted in the rear, it comes out right on the forward spot. It flies fine there, but I'll probably move it back someday soon as the spins and snaps aren't very tight and it needs a touch more down elevator in inverted flight than I like.

Keep in mind that my twin is a bit light because it's running Gas/Glow. But then I have the smoke system on there as well...

AV8TOR

RE: Echo BME twin
 

Av8tor, that twin can turn a bigggg prop compared to the singles. It doesn't need the RPM with the torque it has. I would keep it in that 6000 range. Does it heat up at that RPM? My DA 100 turns just under 6500. D&B or Ridge Machine show 6900 on a 22/10.