THE NEW MT 57CC ENGINE

[zoomer260]

	Quote: Originally Posted by closetguy
	thats what i been looking for a true 2-1 power to weight ratio in a 16-17lb. plane.

Me too, for a say 18lb. heavy "50 cc (yeah right) plane". All these 50cc planes seem a bit heavy for 50cc. We put 4.2's in anything approaching 20 lbs. and 60cc in the grey area. And I was never a light plane freak, just powered 'em accordingly.

Plus I have never been a "3D" pilot but this season would like to try my hand at harriers just so I can get to the slow rolling harrier. AND I need all the help I can get!

I was kinda hoping that I could put this one on a 17-18lb. plane and put the DL on a fifteen pound plane I also have. I like the price tag and hope it proves out, I'm pretty sure it will.

I'm trying to figure out why it is any better than a "lightened" G-62. I guess I compare all the "new" engines to Zenoah, Quadra and Sachs. A pound or less in weight for wing loading only does not always make enough differance? When a trade off in power is part of the price ?

COST is why !!

[soarrich]

This is the mounting template I made, cross referenced to a DA's mounting. I have this in PDF if you want it that way PM me.

I went out today to test tuned pipes and mufflers, the picture is what I took with me.

The guys in the south can't relate to this, but it was so cold I kind of did it more quickly than I would have normally.

I put a 22A on it, and a 11 inch header, then ran it I got 7500rpm. I then put 3 pipes on it and got 7560, 7530, 7500rpm. Clearly I don't know how to set up a pipe, I put a Toro lawn mower muffle, $5.00 at Lowes, on it to see what I got, 7020rpm and good muffling. Then I pit a canister on it 7200rpm, nice sound, and a lower idle. I forgot to take thrust readings, I had it hooked up, I think the noise just had me rattled. The noise at 7500rpm is physical, and I think most of it was prop noise, it hurt.

23A Vess With the KS4 076 60 muffled pipe I got 7400rpm and 33 pounds 12 ounces of thrust, with the MTW TD 75 k canister I got 7200rpm 31 pound 6 ounces of thrust. It was loud, but not physical like the 22As sound.

23B With the same pipe I got 6700rpm with 31 pounds of thrust, much quieter, the canister gave me 30 pounds of thrust at 6650, sounded nice and mellow.

I never got to test the two stock mufflers, the EZ connector broke on my throttle servo, and I was really cold from standing in 34* temps with a 100mph wind blowing on me.

The pipe was causing what seemed like a high-speed miss, clearly caused by not knowing how to set up a pipe because it wasn't there on the open header run or the canister runs. I'll work on that, it's not the engine, it's me.

I'll fly it with the 23A & B with a pipe, I think the B will come into it's own in the air.

Less blogging,more flying for a while.

[joe barrington]

Hi Soarich,the high speed miss that you refer to,probably isnt anything to do with the pipes you ran.If you are using the same spark plug supplied with the engine,this is likely to be your problem.As described on the UK test in previous treads,the spark plug is a real cheapy and breaks down very quickly.Go get a new NGK

[jrjohn]

	Quote: Originally Posted by zoomer260
	Me too, for a say 18lb. heavy "50 cc (yeah right) plane". All these 50cc planes seem a bit heavy for 50cc. We put 4.2's in anything approaching 20 lbs. and 60cc in the grey area. And I was never a light plane freak, just powered 'em accordingly. Plus I have never been a "3D" pilot but this season would like to try my hand at harriers just so I can get to the slow rolling harrier. AND I need all the help I can get! I was kinda hoping that I could put this one on a 17-18lb. plane and put the DL on a fifteen pound plane I also have. I like the price tag and hope it proves out, I'm pretty sure it will. I'm trying to figure out why it is any better than a "lightened" G-62. I guess I compare all the "new" engines to Zenoah, Quadra and Sachs. A pound or less in weight for wing loading only does not always make enough differance? When a trade off in power is part of the price ? COST is why !!

I'd prefer the MT over the lightened G-62. the MT-57 is lighter, and one big plus is the rear carb with reeds. Much easier throttle and choke setup, and no blowback of fuel because it has reeds. One thing I notice a lot with the side carb engines (not the G-62 in particular because I have never seen one) is that they tend to have problems with air hitting the metering diaphram, causing preasure problems and subsequent flameouts. I had a 3MM that did this.

[rcign]

Gonna be VERY interesting...RC Ignition is Larry's service center and a dealer...
Nice to have a choice between the G62 lite side carb and the MT57 rear carb...Performance is close...
And the best 26cc engine, the G26, converted with RC EXL ignition...
I also mport RC EXL ignitions direct from China...
Looks like my website needs a MAJOR makeover.....
FWIW, MY conversions have a carb rotator that gives a straight shot to the throttle servo..What's easier ??

[sinergy]

Now thats the best comment I have seen in this thread... actually the 2nd best. I will leave the first one alone because it doesn't deserve attention haha.

I do have a serious question though Mr. Ralph. Are you going to run the 57 against the beloved G-62 or have you already?

I want to know flat out which is stronger... I am curious.

[rcign]

I haven't even SEEN a 57 yet, but it will probably be a little stronger, based on Tomy and Rich Border's numbers...The DL was a little stronger with the same prop....
Soon as I get a 57 I will dissect it and test some props...

[sinergy]

Cool.. I will be looking forward to hearing about your tests!

[RTK]

	Quote: Originally Posted by sinergy
	Cool.. I will be looking forward to hearing about your tests!

Me too. I know Ralph will give an honest review. Just to throw out a number, my G62 light turns a Mejz 22x10 at 7400.

[zoomer260]

	Quote: Originally Posted by RTK
	Me too. I know Ralph will give an honest review. Just to throw out a number, my G62 light turns a Mejz 22x10 at 7400.

That's a good number. I gotta get a Menz prop or two to try on the DL just so I have personal experience for comparison purposes. In fact, I need to get all kinds of props because one of these days I'm gonna get off my wallet and send one of the G-62's to Ralph.

I'm in need of (again) personal experience with both side by sid to know where things really are with all the 50cc class engines. I'm aware that I as well as most now consider 60cc (old school) in the same class as the "new" 50cc engines.

SEND RALPH a engine !! We are all waiting on his review !!

[rcign]

RTK, your 62 lite is repaired, shipping tomorrow..It's lighter now without the sensor bearing and has a new RC EXL ignition circuit...
Larry says my MT57 engine is shipped...

[RTK]

Thanks for the prompt service Ralph. As always, out standing!

Looking forward to the 57 numbers and evaluation.

[bbagle1]

I just purchased one of these today for an SD models 30% extra. I know it is still new and nobody knows much but what prop should I start with? 22x8 or 23x8? Also what voltage does the ignition need? 4.8 or 6? Hope this engine lives up to at least some of the hype.

[RTK]

For the ignition no need to go over 4.8. As for the prop, if this thing has the poop people are saying, go with the 23x8. The 22x8 will be a little small unless it is one of the thicker heavier loading manufacturers props.

[soarrich]

I have a SD 260 30%er, it's a very clean airplane, much more so that a Yak 54, after the test I did with my MT57 I'd go with the 23x8 or 23a.

I found the stock LG where a little soft, so with a 23 incher you'll want to grease it in. I found that if I slow it down to land it just keeps raising the nose and slowing with the aft CG I'm using. I've got a 9C Futaba and found that I put idle down at 3 on the e switch and mix 5 with throttle to elevator with a 3 also on the e switch it lands very well now. The idle down slows the engine about 150 rpm, and the mix puts in just a little down that it needs to not keep slowing. Mine has a MT62 in it.