ORIGINAL: mstam1971
ORIGINAL: wavy777
Guys, I'm no engine expert, but i do have 3 DL's. The oldest is a version 1 engine with at least 12 - 15 gallons on it now, the others probably have about 4 - 5 gallons each through them. I just wanted to share my experiences on break in and oil.
I simply ran all motors on 50:1 synthetic from day 1, and are on the same mix now and have proved super super reliable, powerful, tractable and a joy to own
As for break in...just make sure the motor ticks over reliably and then go fly the thing...just be aware of fuel consumption when new. I got 8 minutes max on a 26 ox tank when the motor was new, now 26 oz is good for 14 minutes with some left in reserve.
Just my 2c...
Do you have tach readings of your engines? I believe that most of us like to squeeze every ounce of torque from our engines and if you read several posts back you'll find someone having problems with his DL100 because of breaking it in with 30:1 synthetic.
For me a 20oz tank is good for 15 minutes 3D flight with a quarter tank left. I set my timer to 12 minutes to be on the safe side.
Everyone has its own philosophy re breaking engines in, however using a mineral oil for the first gallons helps discharging metal debris. This results in a better compression and better compression equals more power.
I do...all my engines are on tuned pipes, 2 x KS and 1 x ES. All are flown pretty hard...
Motor 1 KS Pipe, Mejzlik 23 x 8 7150 rpm
Motor 2 KS Pipe, Mejzlik 23 x 8 6950 rpm
Motor 3 ES Pipe, Mejzlik 23 x 8 7400 rpm
Cheers
W