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HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › How Many Hyper50's run Gov's?
10-11-2005 08:16 PM  12 years agoPost 21
Louisiana Helicam

rrKey Veteran

West Monroe, LA

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RevMax is even smaller than that.

www.louisianahelicam.com

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10-11-2005 09:05 PM  12 years agoPost 22
irocu88

rrApprentice

norfolk,va

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GV-1 here

Caliber 90 FT os91 c-spec
Caliber 50, OS50 hyper
Caliber 30 OS37

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10-12-2005 01:53 AM  12 years agoPost 23
Jafa

rrElite Veteran

Sydney, Australia

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I'm using a RevMax with a 100% throttle curve,
my flying buddy watched me do a climb out through the tach,
the blades turned backwards 1/2 a turn and stayed there for the entire climb - fantastic


Protos | Logo 400 & 500 | Sceadu Evo | Freya Evo | Trex600N | Avant FX

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10-12-2005 01:59 AM  12 years agoPost 24
Eury

rrProfessor

Dover NH

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I read a review of of the Revmax where they used 100% curves, but man, that is just crazy! If it throws a magent, or fails in some way, your engine is toast, and probably the whole heli if it throws a blade from the headspeed it would shoot to. Don't be lazy, set up real curves and let the Revmax work from that, you are just begging to destroy something with 100%.

Nick Crego

Citizen #0168

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10-12-2005 02:22 AM  12 years agoPost 25
tym2fly1

rrApprentice

VA

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My vote goes for the Rev-Max simply because it only steps in to take care of the only trouble area on any 3D setup curve... slow transitions through 0 degrees. I have ran without any type of RPM regulator for many years with good success flying smooth 3D but I have recently discovered the Rev-Max is the icing on the cake, so to speak, allowing one to run their preferred curves and take advantage of throttle to cyclic mixing all with a standard servo.

Tim

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10-12-2005 03:11 AM  12 years agoPost 26
TMoore

rrMaster

Cookeville, TN

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I read a review of of the Revmax where they used 100% curves, but man, that is just crazy! If it throws a magent, or fails in some way, your engine is toast, and probably the whole heli if it throws a blade from the headspeed it would shoot to. Don't be lazy, set up real curves and let the Revmax work from that, you are just begging to destroy something with 100%.
Crazy huh, have you tried the RevMax with the throttle curve flatlined? I run full power at the top and the bottom of my aerobatic flight modes. If I'm setting up a machine to do FAI rolls my throttle curves are flatlined anyway, with or without a gov. If the Revmax fails, trust me, you can hear it, load up the heli and flip out of the flatlined curve into a conventional curve. If a gov fails and you haven't set a backup curve the chances are that you may crash a machine depending on what attitude you are in. I see a very minor risk here.

A lot of the time I'm flying either in FM2 which is a conventional 3d curve or the RevMax assisted FM3 and it's hard to tell what I'm using because FM2 is so close to being right.

The Flatlined curve works a lot better than a conventional V curve because the Revmax has control of the throttle coming out while you have control of the throttle going in. In order to make the RevMax really work you will have to set the curve over and above the normal throttle curve so that the RevMax is constantly pulling power out to prevent overspeed. Messing with mixes is just that, messing with mixes. If the curve is flatlined no mix is necessary.

I can tolerate a certain degree of uncertainty in the flatlined setup to enjoy the benefits of the RevMax.

TM

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10-12-2005 03:15 AM  12 years agoPost 27
Louisiana Helicam

rrKey Veteran

West Monroe, LA

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I have mine set at 100% all the way across with two backup curves ready to go. The performance is incredible.

www.louisianahelicam.com

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10-12-2005 07:44 AM  12 years agoPost 28
Jafa

rrElite Veteran

Sydney, Australia

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Yeah, most of these fears are pretty irrational - when a magnet is thrown the RevMax will dis-engauge due to the missing signal. RevMax has been around for 6 to 9 months now, I have not heard of a single occurance of a runaway.

The great thing about the RevMax is that there are less maths, it's not trying to follow your throttle curve, it's only looking at RPM and keeping it below that level (so half the work load and predictive maths of a TJPro). The response is very quick due to the simple operation and 100% throttle curve. The RevMax is noticably better than the TJPro (but all governers do a good job in my view).


Protos | Logo 400 & 500 | Sceadu Evo | Freya Evo | Trex600N | Avant FX

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10-12-2005 10:06 AM  12 years agoPost 29
Al Magaloff

rrMaster

12,199 Posts- Enough Time Wasted. See Ya!

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you are just begging to destroy something with 100%.
Completely irrational.

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10-12-2005 12:47 PM  12 years agoPost 30
TMoore

rrMaster

Cookeville, TN

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Al,

Have you tried it? Have you got a RevMax? Flatlining the throttle curve works.

TM

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10-12-2005 01:03 PM  12 years agoPost 31
Dr Lodge

rrElite Veteran

Guildford, Surrey - UK

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A lot of the time I'm flying either in FM2 which is a conventional 3d curve or the RevMax assisted FM3 and it's hard to tell what I'm using because FM2 is so close to being right.
That is the most rationale way of using this device - one flight mode on 100% max with the RevMax assisting, which is exactly how the RevMax has been designed to work, and another flight mode with a standard V curve. If the revmax fails, you'll immediately detect overspeeding of the head and can switch to a traditional V curve.

TMoore - I think Al is supprting your view ie its irrational to think that having a 100% flat curve is "begging to destroy something".

Vibe 90, Vibe 50, Vigor CS x2,
Dyna-x, Knight 503D, Logo 10,
TRex 500, Furion, Gaui EP200

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10-12-2005 02:45 PM  12 years agoPost 32
Eury

rrProfessor

Dover NH

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Well, I don't think it's completely irrational, but if the rest of you think it is, that's cool. I'm sure it does work, and no, I use a revlock, not a revmax. I'm someone who likes having backups of my backups, and thinking about it flying around at 100% curves governed down to whatever the Revmax is set to would bother the hell out of me with what-ifs. Keep running it that way, doesn't bother me in the least, it's not my heli. I'll happily keep flying my Revlock with my backup curves operating right underneath it that are close enough to what the Revlock that if it fails the heli will continue to operate normally, albeit with overspeeding when I go through 0 (never was able to get that out of there before the governor).

Nick Crego

Citizen #0168

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10-12-2005 03:36 PM  12 years agoPost 33
playfair

rrKey Veteran

Rochester, NY

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When I was torn over a gov or limiter last spring the advise given to me was just get the TJPro, it works great. No regrets there.

Al actually loaned me his RevMax months ago to do a side-by-side comparison against the TJ Pro on my R50 hyper. I finally got around to a first look last week, and created a duplicate model in the tranny. Hardware wise it was just swapping a couple connectors.

First off, I've used the TJ Pro for many hundreds of flights. I use a 9253 throttle servo, but barely noticed a difference when using a $25 Hitec 525, except the digital will hunt more if you're running rich.
One note: If you can bog the engine in a maneuver or climbout using curves only, the gov will not work miracles... My pitch is set so the headspeed will slightly increase under a full power climbout, thus slight governor "lag" isn't a problem.

When I first installed the RevMax, I used the same radio settings to achieve 1900rpm on the TJPro. Noticed the HS was being clipped at a significantly lower RPM, so the settings were changed in several steps:

The first test used standard throttle curves that ran the HS below the limiters clipping setpoint, as is the original purpose of the RevMax. This worked well, and I could hear it cut in during normally over-speeding manuvers like rapid descents. Perhaps the muscle pipe's built-in limiting behavior had some effect on this, but my first impression wonders about the difficulty in setting the clipping speed to be just "slightly" above the target head speed.

The next run looked at 2 conditions: First, Idle 1 was set with more aggressive throttle curves which were being limited all the time, just like the TJPro uses. With these settings the limiter seemed a little sluggish compared to my gov, as the head speed seemed to struggle during maneuvers like tictocs. During this same flight I had set I2 throttle to 100% across the board, but left the limiter speed setting identical to the I1 curve. When the switch was flipped, the speed shot up a little (proving that the Rmax really considers the curves), and to my amazement the heli performed like it was on rails. Perhaps it was the headspeed increase, but I won't argue the 100% thing any longer, even though it treats the limiter as a governor (which goes against what the limiter was designed to do).

The next runs (when this rain stops) will repeat much of the above, but the headspeed will be set identically between the TJPro and RevMax,
and the flat throttle curve will be looked at with both units.

Whew!


The sky is our canvas

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10-12-2005 03:37 PM  12 years agoPost 34
Dr Lodge

rrElite Veteran

Guildford, Surrey - UK

My Posts: All  Forum  Topic

I don't actually use a RevMax either...but a TJ Pro and Revlock. But if I were using a RevMax I would definately run the throttle curve flat at 100%, why else would one buy a RevMax?

Vibe 90, Vibe 50, Vigor CS x2,
Dyna-x, Knight 503D, Logo 10,
TRex 500, Furion, Gaui EP200

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10-13-2005 10:38 AM  12 years agoPost 35
Al Magaloff

rrMaster

12,199 Posts- Enough Time Wasted. See Ya!

My Posts: All  Forum  Topic

Have you tried it? Have you got a RevMax? Flatlining the throttle curve works.
Terry, yes, yes, several, yes it does. Thanks Dave Playfair, for the review.

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10-14-2005 04:10 AM  12 years agoPost 36
turboomni

rrProfessor

East of the Equator

My Posts: All  Forum  Topic

Seems overall that the RevMax floats alot of Boats !!
Of the Gov's I am aware of the most expensive is the Futaba GV1 and has the least amount of ,,it's the best. The TJ Pro is really good as is the CSM RevLock but the Revmax seems to do the most for alot of folks when the throttle curve is at 100% WITH a backup curve .
Futaba I would think is about to putout a new Gov as it's pretty old now.
Any info on this?

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10-14-2005 07:28 AM  12 years agoPost 37
Raptorize

rrApprentice

Arizona, USA

My Posts: All  Forum  Topic

tubroomni,
I have the same thought about when will futaba make a new gv-1? Perhap maybe new gv-1 with digital servo mode?

I use gv-1 on my Raptor and revlock on my fury.

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10-14-2005 07:34 AM  12 years agoPost 38
OsiViper

rrVeteran

Farmington, NM

My Posts: All  Forum  Topic

I personally love my GV-1 on my Raptor 50 with hyper..
keeps heaspeed up in flips, tick tocs, etc.

+ I love the fact that i dont gotta tach the dam thing anymore..
considering i just set the headspeed on the gov and forget it :P

Only bad thing ive heard about it is the sensor, but i havent had any problems with it yet.. *Knock on wood*

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10-14-2005 03:09 PM  12 years agoPost 39
turboomni

rrProfessor

East of the Equator

My Posts: All  Forum  Topic

OsiViper, How long you been running the GV1?
I was also considering the GV1 too because I don't own a SkyTach and don't have access to one easily, but it does cost a good bit more.
I also figured from advice from others that you could use your ears to find the happy spot with the other Govs.

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10-14-2005 03:25 PM  12 years agoPost 40
DS 8717

rrProfessor

Here wishing i was somewhere else

My Posts: All  Forum  Topic

With the CSM,the LED's will tell you pretty close what headspeed you will be running. It's an esental part of the setup. Multiply your gear ratio by the headspeed you wantand the select the engine RPM you want and it will hold that engine RPM. Desired HS is pretty much a flyers decision according to how the heli flys.

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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