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HelicopterRadio - Servo - Gyro - Gov - Batt › Straight Line Throttle Curve in Idle up - GV1 vs Revmax
05-08-2005 06:38 PM  12 years agoPost 1
Fuj

rrApprentice

Fairfield, CA

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I'm confused.

I know folks are running a straight line 100% throttle "curve" in idle up using the MA Revmax. This means the engine is running 100% and only is reduced by the Revmax when it senses an overspeed. Makes sense.

Why wouldn't this same concept work with a GV-1?
If I have a straight 100% throttle "line" for my throttle "curve" in idle up, the GV-1 should move the throttle to keep my set RPM both up and down - not just limiting the overspeed. I guess on the same token then the GV-1 would work if I had a straight throttle line at let's say 50% throttle.

What am I missing?

Thanks!
Dan

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05-08-2005 09:28 PM  12 years agoPost 2
RCfun

rrApprentice

Denmark

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On the GV1 the throttle curve from the transmitter is not passed through on to the servo like on the Revmax. On the GV1 the only purpose of the throttle curve is to bring the head speed up to the point where the GV1 engages then it becomes irrelevant (unless of course the magnet falls of and the GV1 disengages).

/RCfun.

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05-08-2005 09:42 PM  12 years agoPost 3
Fuj

rrApprentice

Fairfield, CA

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So this validates what I'm saying, right?

I guess you could start in normal mode with a straight line throttle curve - then when you flip to idle 1 it goes to 100% throttle based on your set GV-1 RPM. Then your throttle lever really becomes a blade pitch changer only - not anything with the engine - since the GV-1 is always fighting to maintain your set headspeed. Then you can either go throttle hold or normal to land.


Dan

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05-12-2005 08:04 PM  12 years agoPost 4
Fuj

rrApprentice

Fairfield, CA

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Anyone else have comments on this - thanks in advance!

Dan

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05-12-2005 08:05 PM  12 years agoPost 5
Fuj

rrApprentice

Fairfield, CA

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anyone else have comments - thanks in advance!

Dan

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05-12-2005 08:47 PM  12 years agoPost 6
Gary

rrVeteran

Crosby, Texas

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I've got a GV-1 on a 90 SE that I run with the idle up 1 & 2 set straight across at 100%. I still prefer the Revmax though.

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05-12-2005 09:49 PM  12 years agoPost 7
JKos

rrProfessor

Redondo Beach, CA

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There are no positives to using a 100% throttle "curve" with the GV-1. The negatives are that you would need to flip out of idle-up quickly if the sensor fails or the magnet is thrown.

Just leave your regular, well adjusted throttle curves as they are.

- John

RR rules!

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05-12-2005 09:54 PM  12 years agoPost 8
Fuj

rrApprentice

Fairfield, CA

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John,

Thanks for the reply -

Wouldn't your statement be true for a Revmax as well?


Dan

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05-12-2005 10:03 PM  12 years agoPost 9
JKos

rrProfessor

Redondo Beach, CA

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> Wouldn't your statement be true for a Revmax as well?

No. The RevMax operates in a completely different way than the GV-1.

EDIT: Oh, unless you mean the comment about flipping out of idle-up upon a sensor failure. Yes, that would be the same.

- John

RR rules!

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06-19-2005 02:16 AM  12 years agoPost 10
Fuj

rrApprentice

Fairfield, CA

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Just looking to revisit this - any thoughts?

Dan

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HelicopterRadio - Servo - Gyro - Gov - Batt › Straight Line Throttle Curve in Idle up - GV1 vs Revmax
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