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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › GY 701 governor or rev-limiter during breaking-in 55HZ?
01-11-2011 05:53 PM  7 years agoPost 1
Bogdan

rrApprentice

Netherlands

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I would like to know your opinion over the use of the governor during the breaking-in time. I have a new 55HZ. Some manufacturers say not to use it because it will start hunting. Is this valid for all governors? What about rev-limiter mode during breaking-in the engine?

thanks!

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01-11-2011 05:58 PM  7 years agoPost 2
Dr.Ben

rrMaster

Richmond, VA, USA

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Unless the engine is excessively rich, a governor can be used effectively even during break in. The main thing you have to really pay attention to is what the mixture of the engine sounds, looks (smoke), and even smells like during the process. The legendary liability for using a governor during engine break in is that if the engine starts to go lean, you won't notice the head speed increase because the governor will pull the throttle back to compensate even as the engine is still cooking itself. In reality, as long as you know what an engine should be doing when it's running well, there is nothing wrong with breaking in on a governor.

Either governor or limiter mode are acceptable during the process.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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01-11-2011 07:26 PM  7 years agoPost 3
Bogdan

rrApprentice

Netherlands

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I promise to pay attention to the motor!

Signed : Dr. Cristian Bogdan C.

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01-11-2011 08:21 PM  7 years agoPost 4
kcordell

rrElite Veteran

O Fallon, MO

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I set mine up in a Fury 55 in governor mode and haven't had any issues at all from the first tank thru the motor and since. I have a little over 2 gallons thru it (didn't get started until late this summer) and was just starting to turn the needle in a little before cold weather hit.

Team Futaba, Team Synergy/Rail, Team Scorpion, Team Castle Creations, YS Engines, VelTye

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01-11-2011 11:05 PM  7 years agoPost 5
dchekas

rrKey Veteran

Farmington, CT

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One observation I've made is that during engine break in, the governor tends to cause the rotor rpm to increase and decrease. The tendency goes away as the needles are slowly leaned out.

I'm assuming this due to the engine running excessively rich?

I've noticed it on 3 different engines.

Team Align, Team Futaba, Team Byron Fuels, Team Thunder Power

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01-12-2011 01:23 PM  7 years agoPost 6
Dr.Ben

rrMaster

Richmond, VA, USA

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Yeah, any hunting behavior is likely due to the engine not being able to respond quickly enough to the commands from the governor for rpm changes. I can say without reservation that an engine can be needled lean enough to avoid the majority of the hunting withOUT being too lean for safe break in.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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01-13-2011 08:23 PM  7 years agoPost 7
marc8090

rrElite Veteran

Long Island, N.Y.

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Since I bought my first GV1 many years ago I have NEVER flown without the governor on. It is perfectly fine to break the engine in with the governor engaged.

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