For the purpose of desing the MT-57CN. this engine are especial for 3D fly . so long stroke , mid size bore are the idea. depend on the long stroke. more troque at the low rpm can bring fast transaction. if for the sports fly , you need speed . so big pitch are recommand , like 22-10 or 22-12 . and for the 3D fly. 23 or even 24 size prop with low pitch like 8 or even 7.5 are good for your action .

I always adjust the H needle little rich and same as L needle . and for the timming . 32 to 35 degree advance are ok for small size prop like 22-8 , so you can get more than 7000 rpm . and for the big size prop like 23-8 or 24-8 , 28 degree advance timming are recommend.

in China , the humidity are quite high then North America. I got 6500 rpm with JXF 24-8 prop and stock muffler. I believe you can get more in USA or Canada . and for the 3D fly with 23 or 24 size prop. L needle need little rich . so you can feel the transition fast . sorry I have no experience with tuned pipe . pe reivers
from MVVS.nl have lot of experience with that , I learn lot from his post .

Thank you

I see you used the picture from Jeff's website, thunderboltrc.com. He has a great package deal right now on your engine if anyone is interested in getting one.

Tomy has anyone tried using this engine on a 20 to 21 pound plane with a 90 to 94 inch wingspan? If so can it pull out of a hover with this much weight?
Thanks
Doug

Wicked, I have to learn to stay off the computer. Just got off the phone with Jeff. Needless to say I bought one and should have it early next week. I have a Giant Stinger ARF that I haven't built that is just sitting around downstairs that would make a good testing mule for this engine. By the numbers the engine is getting I am thinking it would go good on a 75cc to 85cc model for IMAC type flying. something like an Aeroworks 33% Extra 260 or a Hanger nine Carden Yak 54. both are around the 20 pound mark. This engine is putting out better numbers than a G62 so I'm thinking it should work OK as I don't fly 3D.

You may want to do some more reading... there is a handful getting these super high numbers and more not getting them at all.


It's been pretty hard to read through the hype to be honest I haven't been able to make head or tails of the available info yet. I thought at one point in time Pat Roy was getting one but I haven't seen his report to date. Ralph C was suppose to be doing some reports and he has gone silent on his findings.

I am not knocking the engine.. just notice a wide range in actual performance that is larger than most.

I either want that one guy's prop or motor, which ever gets me the 7500 rpm with a 24x8.

Haha Rich,

I have been following pretty close out of curiousity... hey if it performs like some are saying I will call it like I see it!

However someone just made a post on FG about 7000 with a 23x8 Mejlik on a MTW pipe// 7550 with a Ves 23A (which would be expected) throws on a 24x8 Beila and gets 6350. I am sure there is some pipe tunning to do... but Tommy must have a magic stock muffler.

Honestly I dont see why this engine is trying to get hyped up with a 24" prop.. I would rather have a 23 in the 7k range and faster spool up any day. Most 60s will turn a 24" prop anyhow.. I just dont see the advantage.

I think the first video from the UK had people thinking this was the ultimate engine. Well I think the guys are looking for DA numbers at a cheaper price. Tomy and Scott at Brillelli both had the same idea, there's no reason to limit yourself to 50cc. The thing guys want is a sub 4 pound motor that puts out 5 1/2 HP, who cares if it's a 45, 50, 53, 57, 60, or for that matter a 80cc. Make as much or a little more power than a DA50, which is the benchmark, have good customer service, Brillelli and DA are the benchmarks, at a good price. The benchmark for the price is a tough one, is it DA @ ~$750 ready to run, or is it DL which is ~$500 with a good muffler, tough to say. I've not seen one with a good MUFFLER from the manufacture, Brillelli's is the best built, but to call it a muffler is a stretch. Tomy is trying to supply headers and canisters for his engines, which I think is a move in the right direction.

Soarrich I have been reading up on the engine for about six hours straight since placing the order. It was a spur of the moment thing. I see what you say about different results. The guy I bought one from (Jeff at ThunderboltRC) has always been a straight up guy with me. His is the one showing 7170 with the Xoar 23x8 in the video on the other forum with a new engine not yet broke in. He did tweak the timing a bit (reading between the lines I think this is what he meant went he said he tuned it in a following post), but may be unnecessary as I believe the last ones to come over have the timing set at 26 degrees rather than the 14 degrees that hey were at when they first came over. I think that is what I read anyway. Either way I am curious to see how it does when I receive it. I must say though I have received nothing but top notch products and service from Jeff.
My current DL turns 6900 with a Xoar 22x8 after close to 2 gallons of fuel through it at 32 to 1. I will post my results later this summer when I get a chance to run the MT and see how they compare. I will be going on vacation soon and will not get a chance to do much with it until late July.

The 3mm TOC-53 has an excellent muffler, sound level is reasonable and they are well built, TIG welded and polished. And here's another not-so-obvious attribute. The TOC's exhaust port angles away from the spark plug about 1/2" which, on an inverted engine places the muffler about 1/2" higher in the cowl. This, plus the fact that the lower front corner of the muffler is angled, means that I have not yet seen a plane where the stock TOC muffler won't fit completely inside the cowl. This is pretty important, it's really disappointing to have to hack up your cowl just because the cheapie muffler won't fit.

For that matter the TOC-53 is, IMHO, the best of the lot, particularly now that I have the hop up kit which puts its power square in line with a DL-50. I did some side by side testing with Pianori's MT-57 and the TOC-53+ out-pulled his engine by a couple hundred RPM. Allowing for the improvement from fixing the timing (why isn't it right in the first place, how hard is that to do?) the TOC-53 and MT-57 are just about equal. With mufflers attached the weight is equal also.

And the TOC-53 definitely was smoother, owing to its 3 bearing crank that has counterweights ahead of and behind the rod. I have sold many of these engines and I know the service history, there is none better.

TF

Well said!

The 53 and the DA are the two that I don't have, so I forgot the 53's muffler's attributes, which I agree with, slipped my mine, but a reasonable sound level is subjective. Sunday morning at 9:00 start your 5 HP lawn mower and your 53 see which one gets the interest of you neighbors. I had to touch a Honda generator once to see if it was running, that was quite, so quite is doable. 53 is very smooth, I like the three bearings.

The 57 timing issue I can't agree more.

Yes, sound is very subjective. The TOC-53 muffler is not just an open pipe into a can, the pipe goes through the can and then has small holes drilled in its side. This makes it a good deal less noisy than the 57 which is simply a can and an open pipe. Of course running it in your back yard may indeed annoy the neighbors, but what doesn't?

We have an excellent canister system for the TOC-53 as well, if one really needs it quiet this is the way to go. In the air is it quiet enough to be hard to hear if there is another plane in the air.

The TOC-53 doesn't get a lot of hype. For some reason people want to rush to the latest new/shiny thing. People who know me know that I won't sell stuff that causes problems for me or my customers. This is what happened to selling 3w, Evolution/MVVS, DL, and Falkon ignitions. The number of problems I got from customers was way more than what I thought was normal, and/or support from the manufacturer left me holding the bag on warranty claims.

The TOC-53 has been an excellent engine, I'd say that we have had fewer problems with it than with DA engines, and that's really saying something. It's a true workhorse that will run and run with little maintenance.

Maybe you ought to try one!


TF

That's the world we live in! Bling is everything.

Why don't you start a thread on your 53 hop kit, there is intrest out here. I'm working a deal for one Adam sold, he wiped the 3M off the case, like there's so many engines out there you won't really know what it is, duh.

I am planning to do that, but unlike some other vendors who will remain nameless I am very careful about introducing new products. I have a few of the kits out to customers to see if they have any trouble installing them from my instructions and to be sure they work in the field the same as they do in the lab. As soon as I am sure that nobody will have to redrill any holes and that I can be sure it works as advertised I'll start promoting it.

Meanwhile, if you have purchased a TOC-53 contact me, I'd be happy to let you test one.

TF

during the RC model exhibition last week， I have good time with Mr.DL and Mr. 3MM., and the new 3MM 106 are come out . different cylinder design as the TOC53, seems the TOC 52 version 2 are coming out . you may like this new TOC 53 Tom

Actually the 3mm 106 is a 114 and is now running. Availability later this summer. 5.4 pounds.

TF

Here are a couple of pics of my install of the MT57 going into a Laneir Giant Stinger.

This is the template I made for doing the engine install. When I get a chance I'm going to make a proper one on Microsoft XL. The measurements I used worked out perfect. When I drilled the holes the bolts lined right up and the engine was lined up with center.

Managed to get it cowled in but that will be it for about three weeks until the vacation is over. Darn, I was getting close to being able to fire it up. [sm=angry.gif] Anyways here is how the cowl came out. The Stinger cowl is a little on the small side to say the least. Won't have to worry about getting enough air.

break in engine with header and canest setup