If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Engine break-in???
I have a friend who is in the process of finishing one of the Rutan design
pushers. He wants to break in the engine on the ground, on the aircraft, before first flight. I don't see how he can accomplish this without a test club and shrouding to direct the airflow over the engine. In fact I'd be leery of much ground running at all with the cowling off. Anyone have any ideas? I've broken in engines on a proven airplane, but nothing like this. Thanks for any input. Cheers: Paul N1431A KPLU |
#2
|
|||
|
|||
Engine break-in???
In article ,
"Tri-Pacer" wrote: I have a friend who is in the process of finishing one of the Rutan design pushers. He wants to break in the engine on the ground, on the aircraft, before first flight. I don't see how he can accomplish this without a test club and shrouding to direct the airflow over the engine. In fact I'd be leery of much ground running at all with the cowling off. Anyone have any ideas? I've broken in engines on a proven airplane, but nothing like this. Thanks for any input. Paul, You are right! The main objective of breakin is to seat the rings, which is a lapping process and requires high pressure (high manifold pressure) to force the rings against the cylinder walls. This is why most manufacturers recommend mineral oil for breakin -- its lubricating properties are not as good as the compounded stuff. Chrome cylinders are especially critical, as they tend to build up a glaze early and take longer to seat the rings. An ideal method is to instrument each cylinder for temperature and note when you get a large drop in operating temperature. When all cylinders show this drop, the rings are seated and you can switch to "good" oil. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
How to break your Garmin 396 | Dan Luke | Piloting | 7 | August 30th 05 10:29 PM |
Break out the champagne | Jim | Naval Aviation | 2 | June 13th 05 11:01 AM |
Break-in Period for 0200A Continental Engine? | Larry | Home Built | 2 | April 19th 05 05:07 AM |
If you don't want to break your heart | HECTOP | Piloting | 19 | May 14th 04 09:53 PM |
How to break in a new engine? | Baron Man | Owning | 8 | January 7th 04 11:09 PM |