[NSRCA-discussion] Break-in procedure for OS140

[Wayne Galligan]

2-3 Tanks on the ground then run slightly rich in the air for about 1 gallon. 
On the ground for the first few tanks alterate from a rich needle stting to a good two cyle run for a few seconds then back to rich again.
If you have access to a stainless bearing, replace it before running engine or you will be replacing the original in about 30-50 flights depending.

 Best if you can run on test stand and then you can adjust your pipe while breaking in. On 15% Cool Power and an Aeroslave c.f. pipe I am running the length at about 25-26 inches from center of plug to the main baffle.  My current engine is pulling a 19x10 Mejlik prop but the Lockhart 15.25x10 3-blade is a good choice and the new APC 18.1x10W 2-blade is good also.  Run the low end as rich as it will allow and you will get good downline braking with this setup.

I wasnt so sure about using the Mejlik but after this weekend am convinced.  A few guys from the club commented that the downlines where as slow or the same speed as the upline.  So a big Yeh haa on the setup finally. Very quite too almost ELECTRIC LIKE.  It works good in moderate winds too.  I have yet to run it in winds over 15ish but I can always go to the trusty three blade.

Wayne Galligan

  ----- Original Message ----- 
  From: colin chariandy 
  To: NSRCA Mailing List 
  Sent: Tuesday, June 06, 2006 7:55 AM
  Subject: [NSRCA-discussion] Break-in procedure for OS140


  Just got a new OS140. I have'nt broken in one for 5 years...what's the best/current practice for break-in?

  Colin.
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