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Online Forum For All Model Flying Enthusiasts > Flying Forum > General Flying Discussion Forum > ASP 91FS running in

ASP 91FS running in
 Moderated by: Spe, Phil Fearn, colin, admin, AdeH  
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j.smack
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Joined: 8 March 2010
Location: Tuvalu
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Mana: 
  Posted: 10 March 2010 08:11 am
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Hi Guys. Whats the best way to run in a new asp 91fs? How long does it need to be run in for and how to do it?

cheers in advance

john



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Phil Fearn
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Joined: 6 February 2007
Location: Sittingbourne ENGLAND
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Mana: 
  Posted: 10 March 2010 11:02 am
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Hello John . Fit your engine in the intended air frame but dont fit the cowling. Now restrain the model and run a tank of fuel through the engine on the ground use full throttle for short bursts and allow the engine to reach its full temprature . run the engine at various throttle openings and after a five mins or so shut it down and allow to cool . Repeat this a few times and when the engine will idle reliably (Fuel idle screw made need setting ) refill the tank and fly it, keeping the fuel setting slightly rich. Have a couple of flights like this building the speed up and holding full throttle fo longer periods. After say half a dozen flight readjust the fuel settings for full throttle and idle and your engine should be sweet to go.Once it is running really well refit the cowling . You may have to re-adjust the feul setting slightly as the cowling can affect cooling and airflow over the engine , somtimes requireing a fuel adjustment. I run 91FS' on a 41x 7 prop (Graupner ) and they seem fine on that. I also run all my engines on synthetic fuel with 10% nitro. Some may tell you to use fuel with castor oil but it can gumm up internals on modern engines and the externals look awful after a few runs . Synthetic will keep the ngine clean inside and out and running well for years .  If this running in seems brief its because modern engines dont require the running in that older engines needed due to the improved manufacture techniques and materials.

Hope this helps

Phil



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j.smack
MMFC Club Member


Joined: 8 March 2010
Location: Tuvalu
Posts: 29
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Mana: 
  Posted: 10 March 2010 03:13 pm
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Hi Phil. Thanks for that comprehensive answer. i will post results shortly!

cheers again

 

John



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Ian M
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Joined: 3 March 2007
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Mana: 
  Posted: 11 March 2010 11:27 am
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Phil that is one heck of a prop a 41 x 7 you must have long legs on the model :D
Martin
MMFC Club Member
 

Joined: 11 March 2007
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Mana: 
  Posted: 11 March 2010 07:47 pm
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I've got the same motor and found the 41/ 7 to be a bit on the small side , I run a 55/9   :P

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