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HomeAircraftHelicopterAlignT-REX 700N › Can some one help me with break in procedure for a os 91 hz-ps
01-12-2010 01:10 AM  8 years agoPost 1
scotty3

rrApprentice

houston, texas - united states

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Im a noob to nitro helis and dont want to start it without know exzactly how to break it in. I set the needles to what the manual says, but it doesnt mention how to break it in. Thanks, scotty

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01-12-2010 02:05 AM  8 years agoPost 2
jschenck

rrProfessor

La Vista, NE.

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there should be a whole section on the manual called:

Starting, running-in/( "breaking-in" )

unfortunantly doesn't look like they have the OS HZ manuals online yet but the SZ manual should be pretty close

http://manuals.hobbico.com/osm/91sz...yper-manual.pdf

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01-12-2010 04:58 AM  8 years agoPost 3
koppter

rrApprentice

Virginia

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informed minds may differ, but here's my technique for my Hypers and two Align 91s that I have or have had.

First, spend a minute with the fuel system and make sure there are no leaks, and the plumbing is correct.

Second, Because you can't see the throttle barrel, you have to guess as to where to find the idle for that initial run. one way to do this is to bring the trim back while watching the servo. when the servo stops moving, the barrel is fully closed. Now add 6 -8 clicks of trim to slightly open the barrel.

Third: Make absolutely sure that your stick in down and the engine is in normal, and the throttle curve for normal is linear from 0 to 100.

Four: Unlock the fuel clamp which I am assuming you have.

Five: With a frim hand on the head, and the transmitter easily within reach, engage the glow plug and hit clutch with the starter. if it pops but won't start, move the trim up 2 - 3 clicks until it fires. If it is obviously a higher idle than you want, move the trim down a bit.

Six: Go into a hover and let the engine settle in. It will be very rich, which is fine. Simple forward flight is good for break in because it will open the barrel allowing the engine to reach operating temp without really loading it up with collective.

Seven: It's normal for motors to go lean when they are new when fuel starts getting low. Thus, you might want to land when you get to 1/4 tank or so and refuel.

Once you get past that initial flight, you can start tweaking the needles, but go slowly, and adjust the high speed first, and then the mid. once they are where you want them, forget about them.

have fun.......

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01-12-2010 11:55 PM  8 years agoPost 4
Chickenrun

rrVeteran

Lincolnshire England UK

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Run your motor in during the hover with lots of smoke and don't hammer the pitch, just run a few tanks this way, you could fly the heli around, but DON'T HAMMER the collective pitch

Cheers

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01-13-2010 03:03 AM  8 years agoPost 5
scotty3

rrApprentice

houston, texas - united states

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Thanks for the help guys, there's sooo many ways you can break them in, and btw it doesn't say in my manual

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