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HomeAircraftHelicopterGasser Model RC HelicoptersOther › FBL system for T-Rex 700 Gasser
02-04-2012 03:44 AM  6 years agoPost 41
Doug Darby

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Dallas, Texas

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VBar Gov
It took some experimentation but the VBar governor is working wonderfully on my TRM VX231 in my 700G.
I am fortunate to fly with some really smart VBar guys that enjoyed the challenge of helping me get it dialed in on the Gasser.
I flew a GV-1 with Raja's great setup for years and it did a great job, but now I prefer the VBar gov.

I really want to hear more about the HC from you Raja. You have as much experience with them as anyone. Also what are your thoughts on the "bailout" feature and how often do you use it and how effective is it? I saw it demoed at IRCHA and was impressed but I would rather hear it from a "regular" pilot.

doug

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02-04-2012 03:46 AM  6 years agoPost 42
Tyler

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Chicagoland area

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Long ago Arcamax tried to develop a gyro/governor combination that would anticipate power demands. Part of their theory was to have the governor tied into the cyclic and pitch servos so that it could pull back the load from the blades and jockey the throttle at the same time. It would add throttle until there was no more power available. If the headspeed decayed further it would then reduce pitch to keep the headspeed on target.

Well, that system never was fully developed and they closed shop.

Another company tried the same thing before FBL came along, but I cannot recall who.

Enjoy things that money can buy IF you don't lose the things money can't buy.

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02-04-2012 03:53 AM  6 years agoPost 43
Eury

rrProfessor

Dover NH

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Pay attention to the discussion Tyler. If a governor anticipates a bog or overspeed condition and does not allow it to happen before reacting to it, the headspeed stays more consistent. That is all I've ever said.

I referenced an underpowered machine because getting behind in one is harder to recover from than something over powered. I'm not the only person in history who has noticed that headspeeds stay more consistent on the governors that are built into the Vbar and 750, do some searches, there are plenty of others who have noticed the same thing.

Any particular reason you want to argue with me?

Nick Crego

Citizen #0168

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02-04-2012 03:54 AM  6 years agoPost 44
Tyler

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Chicagoland area

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Doug, what was the secret to succeeding with the Vbar governor on the gasser?

I used the captain rescue on a T700. I see it as a very valuable tool for someone that is trying to learn new orientation yet faces the challenge of staying two mistakes high and still being able to see the helicopter clearly. The higher we fly the more mistakes we can make. However, flying higher also makes it more difficult to see exactly what the helicopter is doing and how effective our small inputs are.

Captain rescue can allow a pilot to bring the machine down lower where it is easier to see and correct without the fear of not having time to make a few mistakes. In fact, fewer mistakes are made because we don't have to wriggle the sticks this way-and that way to determine exactly where we are.

Have you ever thought you were in a different orientation because the heli was so small and far away?

Where you flying high as a safety net?

Captain rescue can help.

Enjoy things that money can buy IF you don't lose the things money can't buy.

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02-04-2012 03:58 AM  6 years agoPost 45
Tyler

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Chicagoland area

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Any particular reason you want to argue with me?
Who's arguing?
If a governor anticipates a bog or overspeed condition and does not allow it to happen before reacting to it, the headspeed stays more consistent.
Please explain how this is done.

Enjoy things that money can buy IF you don't lose the things money can't buy.

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02-04-2012 04:03 AM  6 years agoPost 46
Eury

rrProfessor

Dover NH

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The governor in the built in units feed throttle in according to your stick inputs as well as the governor sensor. You start a collective/cyclic input and it gives more or less throttle before the bog or overspeed and adjusts from there based on what the sensor feeds back. Simply put, It has more data to work with than a stand alone governor.

Nick Crego

Citizen #0168

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02-04-2012 04:15 AM  6 years agoPost 47
fastflyer20

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N. Tonawanda, NY

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My Vbar did a great job of "anticipating" when pitch was applied, the best gov when requiring power. It absolutely made the engine respond better since it could increase throttle based on pitch change before the HS drops. Unfortunately the 990 crab is known for a lean midrange the Bar did not handle well. It sure sounds like the Vbar works well with a different crab/engine combo.

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02-04-2012 04:20 AM  6 years agoPost 48
Tyler

rrElite Veteran

Chicagoland area

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It sounds like the Vbar governor adds the throttle before the head is loaded. This allows it to spin up the blades and keep the inertia one millistep ahead of the load. I can see the value of this design, if the engine and carb can respond fast enough and if the head isn't loaded too quickly.

I think I'll just go for more power. I can stoke the coals at any time and just plow through the workload. Then I only have to worry about over-speeding, which a Throttle max can probably do just fine.

At the moment, throttle curves are working fine. I'm going to try a throttle max soon.

I won't give up my Helicommand simply because it doesn't have a governor.

Enjoy things that money can buy IF you don't lose the things money can't buy.

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02-04-2012 04:32 AM  6 years agoPost 49
turboomni

rrProfessor

East of the Equator

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I really want to hear more about the HC from you Raja. You have as much experience with them as anyone. Also what are your thoughts on the "bailout" feature and how often do you use it and how effective is it?
I guess Raja can't say anything for some reason. But I guess will until proven guilty ,,for what reason I do not understand Lol!!
I saw Raja flying this system last year and he was doing amazing auto's with it ,,upside down,,right side up then down ,,etc with this system but he could do that before too. He seemed very comfortable with the HC. He then said the Bailout feature saved his heli. I couldn't believe it at first but then he showed me while he was flying it. All sorts of weird positions he put it into on purpose and then ,,,he pulled the rip cord!! Whatever the position it was in it would go to the closest position either upright or inverted and go into a slow climb. It was amazing. Raja said it saved his heli at least once. If it saved his heli once,,,that is proof enough,,,all I have to remember is what switch the blasted bail out switch is!!! That is if I can get one soon. I think every FLB system should have this as STANDARD EQUIPMENT whether you want it or not . It can't be that hard to design that into a system that has all the basic equipment to do so.

Setup is everything, All my heli's can fly far better than I can pilot them

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02-04-2012 09:01 AM  6 years agoPost 50
shawmcky

rrElite Veteran

Isle of Wight,United Kingdom

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If one knows where your engine makes its best power/torque balance in the rev range,and a governor keeps the engine roughly in this band,this,along with a good pitch set up will help with sustaining the power,just as with a real helicopter,will it not?Helping out with bogging,damn useful if power is limited surely?Good collective management no doubt works with experience and a good earGovernors make life easier,ask an airline pilot

Team- unbiased opinion.K.I.S.S principle upheld here

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