Running in
04-09-2003, 07:03 PM
#2
Running in
Yes, but it's not nearly as complicated as some people make it sound. Just fill your tank, start the engine, and let it run a little rich. Refill the tank and start it again.
After two tanks, I lean it out to where it should be (but never too lean!) and start flying.
After two tanks, I lean it out to where it should be (but never too lean!) and start flying.
04-09-2003, 07:10 PM
#4
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Running in
I am with MinnFlyer ! 2 Tanks is all they need on the ground. When you fly them new out of the box, just make sure you don't flyn them at only one throttle setting duringb the whole flight(specially not full throttle all the time). Move the throttle stick around a little while in flight.
04-10-2003, 08:30 PM
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Running in
I always run a new engine on a test stand first just to make sure it works. There's nothing worse than getting to the flying field and not flying because the engine doesn't work right.
Also, if you know the engine works on the stand, but not in the plane, then you also know the problem is in the fuel-system - not the engine.
But most of the breaking in is done in the air after I run a tank or two through the engine on the stand.
Also, if you know the engine works on the stand, but not in the plane, then you also know the problem is in the fuel-system - not the engine.
But most of the breaking in is done in the air after I run a tank or two through the engine on the stand.
04-11-2003, 01:49 AM
#8
Running in
Had some fun beaking in a new O.S. 70 Surpass with a 13 x 8 prop a week ago. I clamped my test stand to a saw-horse and set it out in my driveway on a dusting if fresh snow. When I opened it up full it pulled the saw-horse and all a foot or so before I could throttle back! Never tried one on snow before. I was quite impressed.
Manual said to open it up full throttle, but alternate from overly rich for 10 seconds to "near maximum r.p.m." for 5 seconds. After 15 minutes of this 15 second cycle I got pretty good at judging by sound and sight (cloud of oil) whether the engine was running rich or not. I confess that by the second tankful I was letting it go more than 5 or 10 seconds between adjustments, but I was also changing the throttle settings. I think I'm gonna like 4-cycles.
By the end of the second tankful it would idle down and purr like a kitten.
Manual said to open it up full throttle, but alternate from overly rich for 10 seconds to "near maximum r.p.m." for 5 seconds. After 15 minutes of this 15 second cycle I got pretty good at judging by sound and sight (cloud of oil) whether the engine was running rich or not. I confess that by the second tankful I was letting it go more than 5 or 10 seconds between adjustments, but I was also changing the throttle settings. I think I'm gonna like 4-cycles.
By the end of the second tankful it would idle down and purr like a kitten.
