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-   -   MT70CC TWIN (http://www.rcuniverse.com/forum/gas-engines-142/9437379-mt70cc-twin.html)

3DDino 01-22-2010 04:41 AM

MT70CC TWIN
 
GUYS
Has anyone tried this, seems like an awesome engine at least on paper
thx

pe reivers 01-23-2010 05:35 PM

RE: MT70CC TWIN
 
??

captinjohn 01-23-2010 06:07 PM

RE: MT70CC TWIN
 
1 Attachment(s)
This is the only twin engine under $500 and can swing 24-8 prop up to 7K with stock muffler ! and engine weight only 3.26lb with plug !!!. people know the advantage of twin engine compare with single . smooth without vibration . and we made it still light weight just like single cylinder engine

Engine weight only 3.26lb with plug!!!!

Specifications:
Displacement: 70cc
Bore: 37.5mm
Stroke: 32mm
Ignition: RCEXL
Carb : Walbro HDA
Engine only weight 3.26lb (with plug)
Prop range: 22X10 - 24X10-26X8
RPM Rang 1200-

unit53 01-23-2010 08:24 PM

RE: MT70CC TWIN
 
im still waiting for mine to arrive,,tommy did a run of 100,this week according to him ,and im supposed to recieve one of them,,it looks like ,i may be one of the first people getting one,ive heard alot of hype from mtengines usa,,and others but i personally havent heard from one single mt70 twin owner ,about its operation or performance,so,,,,when mine ever arrives,ill either start a thread ,,or post pics and comments ,,when i do post info.bear in mind that im not a machinist or engineer,just a rc modeller who has be either around or active in rc for over 30 years.so my explanations may not be so technical but stated to the best of my ability..

closetguy 01-24-2010 06:37 AM

RE: MT70CC TWIN
 
If this engine really weighs 3.26 and can swing a 24-8 prop at 7000,it will be very popular with many,me included.
But this one i will wait till there are more reports.

pe reivers 01-24-2010 07:22 AM

RE: MT70CC TWIN
 
Looks good. Tomy catches up quickly.

Bass1 01-24-2010 04:24 PM

RE: MT70CC TWIN
 
I'm waiting on my "field testers" engine as well;)!

Tired Old Man 01-24-2010 06:22 PM

RE: MT70CC TWIN
 
If they accurately copied the old 3w-70 it should run pretty darn well. It could be a good choice for 1/3 scale Cub/Citabria/Decathlon type aircraft.

pe reivers 01-24-2010 06:49 PM

RE: MT70CC TWIN
 
with that weight, it never can be an accurate copy!

Tired Old Man 01-24-2010 09:55 PM

RE: MT70CC TWIN
 
A look at the cylinders confirms that as well.... We'll see how they do for the beta test crowd;)

captinjohn 01-24-2010 11:17 PM

RE: MT70CC TWIN
 
I am betting the MT70 Twin will do well! Capt,n

3DDino 01-25-2010 11:54 AM

RE: MT70CC TWIN
 
why cant this be used in 3d-plane
thx

captinjohn 01-28-2010 11:09 PM

RE: MT70CC TWIN
 
It should work fine for 3D on a good sized profile airplane. Look pretty neat too!. SMOOTH!

3DDino 01-30-2010 05:00 AM

RE: MT70CC TWIN
 
Profile airplanes?
you mean its only good for profile planes
is it ok for say ef yak 50cc
thx

captinjohn 01-30-2010 10:48 AM

RE: MT70CC TWIN
 
1 Attachment(s)
Quote:

ORIGINAL: 3DDino

Profile airplanes?
you mean its only good for profile planes
is it ok for say ef yak 50cc
thx
I did not say only good for profile planes...just kinda hinting that it may be neat...equal weight on each side of the profile fuse. The MT 70 engine should work good on any airplane for 3D if the weight to thrust ratio is right. Best Regards & good luck, Capt,n

Super08 01-30-2010 12:55 PM

RE: MT70CC TWIN
 
It may be hard to find a 50cc size plane to put it in and not have to cut the sides of the cowl. In the pics the MT70 is showing about 11" wide at the caps. Most of the 50cc planes are 9" to 10" wide at the cowl.

Bass1 01-30-2010 02:12 PM

RE: MT70CC TWIN
 
Probably would fit in a 30% Cap 232 or similar with those big cowl cheeks.

Tired Old Man 01-30-2010 02:32 PM

RE: MT70CC TWIN
 
3DDino,

Just an FYI for comparitive purposes, the 3w-56 twin works extremely well for 3d, so there's no reason a 70cc twin would not work out as well. Taking it a step further, where would we be if the 100cc plus twins didn't 3d well?

captinjohn 01-30-2010 02:45 PM

RE: MT70CC TWIN
 
:DHEY...I am feeling better about the whole sit ee a tion now!:D Capt,n

3DDino 02-01-2010 09:39 AM

RE: MT70CC TWIN
 
but then they were saying twin engines in nature yeilding more friction than single ones hence not as love to spin as the single cylinder given same cc
im lost
thx

Super08 02-01-2010 10:54 AM

RE: MT70CC TWIN
 
What it means is a single cylinder engine of the same size will have more power than a twin. The twin will be smoother though,

3DDino 02-01-2010 12:17 PM

RE: MT70CC TWIN
 
thx

3DDino 02-01-2010 12:26 PM

RE: MT70CC TWIN
 
in that case single is not that bad after all
how do you determine to use twin or single of the same size for 3d flying
thx

captinjohn 02-01-2010 05:05 PM

RE: MT70CC TWIN
 

Quote:

ORIGINAL: 3DDino

in that case single is not that bad after all
how do you determine to use twin or single of the same size for 3d flying
thx
This is the only twin engine under $500 and can swing 24-8 prop up to 7K with stock muffler and engine weight only 3.26lb with plug !!!. People know the advantage of twin engine compare with single. Smooth without vibration and we made it still light weight just like single cylinder engine is what was posted. Now a 24X8 prop turning 7000 RPM sure should hover something!!!! Capt,n

tomyrcmodels 02-05-2010 10:56 AM

RE: MT70CC TWIN
 
1 Attachment(s)
FIRST ECHELON ARE READY TO GO


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