THE NEW MT 57CC ENGINE

[Jkoch713]

	Quote: Originally Posted by andy74rc
	I understand, BUT, i recently purchased a MT57 which have a steel conrod....... So, I'd like to know the reasons of the change. Could be cost reasons. Cheers Andrea

I have talked with others about alum. and other "rare" metals used to reduce weight in engines...
and what I found is that you can't make a crankshaft out of TI or aluminum due to it not lasting to
the motor pulses (Think Formula 1-racing.... they don't even use the stuff)

Anytime you reduce rotating mass in a engine, you increase power output to the crank shaft...
(from what I understand).
Alum vrs. steel ROd? not sure ....but one would think that being that the 2-largest names in RC (DA, and almost possitive 3w does) plane gasoline/petro engines use a alloy other than alum.

Wether stamped, pured, forged or otherwise...would make me think that they are on to something right...

I am thinking that there isn't a need to worry why it has been changed, mostlikely for the better.

[andy74rc]

	Quote: Originally Posted by Jkoch713
	I have talked with others about alum. and other "rare" metals used to reduce weight in engines... and what I found is that you can't make a crankshaft out of TI or aluminum due to it not lasting to the motor pulses (Think Formula 1-racing.... they don't even use the stuff).

Nor 2 stroke racing engines does. Apart some karting engines to be honest.....

	Quote: Originally Posted by Jkoch713
	Anytime you reduce rotating mass in a engine, you increase power output to the crank shaft... (from what I understand). Alum vrs. steel ROd? not sure ....but one would think that being that the 2-largest names in RC (DA, and almost possitive 3w does) plane gasoline/petro engines use a alloy other than alum. .

I call aluminium what should be a T7075-T6 alloy...

	Quote: Originally Posted by Jkoch713
	Wether stamped, pured, forged or otherwise...would make me think that they are on to something right... I am thinking that there isn't a need to worry why it has been changed, mostlikely for the better.

Being working and living in China since 5 years already, in manufacturing and quality field, I wouldn't bet my head on this.......

[closetguy]

maybe with the smaller in size or mass of the steel rod,the engine may not vibrate as much?
also MVVS-Evolution has aluminum rods and they are the top dog in power rite now IMO.

[RTK]

Balanced counter weight, porting, timing etc., affects vibes, no matter what material is used.