Whats the best way to break in a OS91DF  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       


BVM Super Bandit - ARF
Seller:  rc4mike
Details:   $4,500.00   |  9/1/2008   |  Classified Ad
We will rotate YOUR AD in this spot if you select "Forum Featured" when placing or editing your ad!

All Forums >> RC Airplanes >> RC Jets >> Whats the best way to break in a OS91DF
Page: [1]

Login
Message << Older Topic   Newer Topic >>
Whats the best way to break in a OS91DF - 12/10/2001 11:28:32 PM   
airspeed917



Posts: 64
Joined: 12/9/2001
From: NY
Status: offline 		I had to buy a new OS 91 for my Byron F-16, I never broke in a D/F motor before. Whats to best way to break it in either on the bench or in the plane on the ground (with out overheating it,) since there is no airflow over the motor if the Jet isnt moving?

And if anyone is interested I got an incredible deal from TGA on the OS91 large head motor and the hurricane replacement fan.
$314.00 for the combo,, thats less than Tower Hobbies get for the motor alone..
       Post #: 1

miss quote - 12/11/2001 2:47:44 AM   
airspeed917



Posts: 64
Joined: 12/9/2001
From: NY
Status: offline 		Figures, a half hour after I posted this, TGA called me back to tell me they under charged me $100, I knew i was to good to be true

(in reply to airspeed917)
       Post #: 2

Whats the best way to break in a OS91DF - 12/11/2001 6:40:27 AM   
JohnVH



Posts: 14723
Joined: 12/5/2001
From: Lynden, WA, USA
Status: offline 		Oh man, if that doesnt get you worked up, So far I have had a good experience with them, But I have not got my jet yet..Should be problem free from what I heard..

I put mine straight in the Jet, ran it a little rich, made sure it didnt get too hot. Ran it a bit then shut it off, it should have came with some instructions..

(in reply to airspeed917)
       Post #: 3

Re: Whats the best way to break in a OS91DF - 12/11/2001 11:27:46 PM   
Jackjet



Posts: 1019
Joined: 12/9/2001
From: Hesperia, CA, USA
Status: offline 		[QUOTE]Originally posted by airspeed917
I had to buy a new OS 91 for my Byron F-16, I never broke in a D/F motor before. Whats to best way to break it in either on the bench or in the plane on the ground (with out overheating it,) since there is no airflow over the motor if the Jet isnt moving?

And if anyone is interested I got an incredible deal from TGA on the OS91 large head motor and the hurricane replacement fan.
$314.00 for the combo,, thats less than Tower Hobbies get for the motor alone.. [/QUOTE]

Hi Airspeed917,
I have run in 10 OS.91's-the first thing I do is disassemble the engine-make sure there is nothing in there that does not belong-then I clean it up real good with solvent-(carb cleaner and brake cleaner)-then I use red and blue Locktite on all the bolts EXCEPT the 6 cylinder head bolts-I use the Red L.T. on the front housing 4 bolts-Blue on the rear drum rotor housing 4 bolts-Red LT on the carb. throttle arm nut and the carb barrel retainer screw- Red LT on the 2 carb. mounting bolts.-then I dump in ATF to pre lube it. First run-I use Powermaster 15% and I add 8ozs. of Castor oil per gal.Open main NV approx.3 full turns-start it up-let it run rich for 1 min.-pinch the fuel line to lean it out some-do this 10 times-then go fly it-keeping it slightly rich all the time.I do the run in in the airplane with the fan on it.



Jackjet

_____________________________

Jack Jet Williams
Hesperia,Ca

(in reply to airspeed917)
       Post #: 4

head Bolts - 12/13/2001 3:18:02 AM   
w0mbat



Posts: 373
Joined: 12/6/2001
From: Lake Havasu City, AZ, USA
Status: offline 		The last time I assembled my 91DF, I used blue locktite on the 6 head bolts - 2 flights later, by head came off in the air and down came the jet!!

Now I use red loctite and check them before each flight!

(in reply to airspeed917)
       Post #: 5

Head Bolts - 12/13/2001 6:04:06 AM   
airspeed917



Posts: 64
Joined: 12/9/2001
From: NY
Status: offline 		Hey Wombat, Funny you should mention that, thats the reason why I'm having to break in this new motor. Three of the six bolts came out in flight,The three remaining couldnt take the compression and the head lifted up and the force of the motor firing was directed out the side and took a hunk of the crankcase out. Luckily I was coming up wind and was able to deadstick it in.
I'm going to red loktite the s**t out of this one.

(in reply to airspeed917)
       Post #: 6

OS.91 head bolts - 12/13/2001 7:16:27 AM   
Jackjet



Posts: 1019
Joined: 12/9/2001
From: Hesperia, CA, USA
Status: offline 		Hi Pilots,

the only reason I don't recomend using any Locktite on the headbolts is because when I used it in the past on Rossi.81's and OS.77's ,the heat cycles of running the engine(s) would really lock them in the crankcase so tight that they would strip the hex head out of the bolt or they would twist off. Then you would have to use a EDM to get them out.I have found that if I properly torque them in even steps-they NEVER come loose anymore.And I clean the threads on the bolts and crankcase with brake cleaner. Hope this helps.


Jackjet

_____________________________

Jack Jet Williams
Hesperia,Ca

(in reply to airspeed917)
       Post #: 7

Page:   [1]
All Forums >> RC Airplanes >> RC Jets >> Whats the best way to break in a OS91DF
Page: [1]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

0.531RCU1