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GrandRC . CanoMod . A Main Hobbies

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Gasser Model RC Helicopters > Crashed my gasser today!
 
 
lperagallo
Senior Heliman
Location: Westfield, Indiana, USA

I agree with most that the servo does run hot, however, one reason it will run hot is the gain turned up too much. I've run a 401 on my Gasser for two years and ended up changing out a servo after running too high a gain. Now things are fine, still runs warm, but remember we are talking 15 to 20 minute flights, not the usual 10 minute flight of a Nitro.

Lou

Bergen Intrepid EB, G-26, 720mm; Bergen Turbine, Wren MW54; Raptor 50V2, OS50-Hyper
04-14-2008 01:16 PM
 
 
AceBird
Elite Veteran
Location: Utica, NY USA

Quote 
it could not be a switch failure Raja is right I have an RH Generator and it works even without a battery.

So you normally fly with the switch off? If your generator is regulated to 5.4 V and you were experiencing a servo bind or overload condition it could have pulled the voltage down enough to reset the gyro. If the battery remained in the circuit it may not have been able to lower the voltage enough for a while. Although you didn’t heed the warning the first time so this could be a wrong assumption. A properly designed switch should not fail because of a crash impact if there is no physical damage visible to the switch after the crash. It is very common to crash RC aircraft. We even make jokes about it. If you don’t want to repeat this event you will not overlook the fact that the switch was in the off position.

Ace
What could be more fun?
04-14-2008 05:39 PM
 
 
rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

Ace

Reread the quote you quoted from Shiro, I think you misunderstood what he said in that sentence.

Then when you understand what Shiro and I said, you can throw out all the replies about low battery or switch problems - they are mute points.

As an FYI, the generator (at least mine not sure about Shiro's) will definately support the helicopter through ALL the 3D maneuvers no matter how hard they are as long as the engine is running at speed. I found that out the hard way by FORGETTING to turn the switch on (yes I've done a dumb thing when I got distracted by people curious about my generator back in Jan 2005 timeframe) and I flew an entire 15 minute flight on generator power only.

Just let me say I would NEVER do that knowingly even for a "test" as I'm a very careful pilot and I don't like to take risks with my models, and that being said no-body else should test this unless you are on the ground firmly holding the machine and just showing your friends how it works at high idle speeds.

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator
04-14-2008 06:10 PM
 
 
AceBird
Elite Veteran
Location: Utica, NY USA

Quote 
Then when you understand what Shiro and I said, you can throw out all the replies about low battery or switch problems - they are mute points.

I don’t think you are understanding what I am saying. Why was that switch off? It is not a mute point if it was on at the beginning of the flight. The servo current draw is not much different just puttsing around as it is with full blown 3D. But a binding situation can be a huge current draw. Some people don’t top of the battery when they have a generator on board. So some current is going into the battery besides supplying the servo load. Just because you survived a flight with the switch off doesn’t mean it will survive all flights under all scenarios with the switch off.

Ace
What could be more fun?
04-14-2008 09:30 PM
 
 
xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

AceDird
Quote 
I don’t think you are understanding what I am saying. Why was that switch off?

Because he CRASHED,,, What part of crashed don't you understand???? And to say AceDird
Quote 
Why would a crash turn off a switch? It shouldn't.
Shows everyone on here how DUMB you really are,,, You have ZERO experience when it comes to flying anything,,, Go stick you nose back into your paper back book, I (WE) have no use for ONE GALLON EXPERTS STATEMENTS!!!!!!!!!!


You AceDird,, had what ONE switch that went bad, (Probably cause you installed it wrong) and everyone's switch is BAD???? WRONG!!!!!!!!


I have 100's of hours on my JR switch, Not one time has it given me any trouble, and it has been thru several crashes and YES some of them even turned the switch off,, Go Figure!!!!!

You need to go back and reread the whole topic,, every post,,, every word,, then you might have a clue as to what happened, Instead of just posting so you can reach the RR Master Status...

John Crotts
www.soonerhelicamproductions.com
04-14-2008 10:10 PM
HOMEPAGE  
 
 
Shiro Muji
Senior Heliman
Location: Japan

I've already sorted out the problem. it was the tail rotor servo that cause the problem. it overheated while doing 3 consecutive very fast pirouette for about 3seconds each. Maybe 401 cannot handle very fast pirouette on a gasser. just my opinion.

Maxum with Hanson 3D Max, Maxum Nitro, Maxum 30.5cc modified engine, RH Generator, Sceadu .50Hyper
04-15-2008 12:53 AM
 
 
xcellgasman101
Elite Veteran
Location: WOODWARD, OKLA....

Quote 
and I checked my servo and it is hot, check the linkages and its a little hard to push. upon checking the tailrotor shaft and slider got a lot of gum maybe because of the silicon lubricant I used


Well now remember you said that the tail rotor slider was bound up by goop, from the lubercation that you were useing,, I would guess that might be the problem here,, If it was binding the servo for several flights, and heated the servo over several flights, then the servo burns up, Thats not the fault of the 401,,, but the binding of the slider,,, I used to use the 401/9254 servo on my Xcell gasser for quite some time, without any failure... I would get a new servo, and make sure that the tail rotor linkage is smooth and free of any binding,, and you will be ok,,, Just my thoughts,, Hope this helps,,

John Crotts
www.soonerhelicamproductions.com
04-15-2008 01:06 AM
HOMEPAGE  
 
 
FCM
Elite Veteran
Location: Back in Blighty!

John's right - it doesn't matter what servo/gyro combination you are using - the linkages must be as free as possible without any binding. The servo will probably have been heat damaged during the time you were flying with a sticky slider. The 3 turn piro was probably incidental to the actual failure.

Paul.
04-15-2008 01:32 AM
 
 
Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

hmm

I had this happen 2 years ago. I tried to save the bird in pyro flip, but didnt work. I narrowed it down to the output shaft being full of junk and possiblly burning the tail servo up. This is when I ran the closed tail and the bearings would leak out onto the shaft and slow the tail way down.

Sorry man it sucks.


-Cody

All that a man achieves and all that he fails to achieve is the direct result of his own thoughts
04-15-2008 03:31 AM
 
 
gorn
Elite Veteran
Location: Western Australia

Sorry about your crash Shiro

If you bling it, they will come :D
04-15-2008 03:40 PM
 
 
Shiro Muji
Senior Heliman
Location: Japan

my Gasser is up again. Thanks RealHeli for a great product and customer support. Right now still waiting for my new spartan gyro. I would want to replace my old one. No flying yet till I replace my gyro The good thing about the crash is I get a chance to clean my heli!lol!

No worry Gorn, it did not damage my pipe. lol! not a single scratch. the only damage part is of course the Main Blade, main mast, spindle, flybar rod, Landing gear, tailboom, tail rotor output shaft and rudder blade.

Maxum with Hanson 3D Max, Maxum Nitro, Maxum 30.5cc modified engine, RH Generator, Sceadu .50Hyper
04-16-2008 03:50 AM
 
 
gorn
Elite Veteran
Location: Western Australia

Good to hear Shiro

If you bling it, they will come :D
04-16-2008 04:07 AM
 
 
Rappy 60
Senior Heliman
Location: Houston, Texas

Glad to hear the bird is back up and running. I have had the exact same thing happen to me, turned out to be the wire going into the servo. Apparently there are high failure rates for 9254's, just do a search here on runryder. I have had to send in 3 9254 over a 1 year period.

Dale

Load "*",8,1
04-16-2008 04:14 AM
HOMEPAGE  
 
 
rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

Cost

People are complaining about price of repairs of gassers and cost of parts. Can you post for us the price of the invidvidual parts you used to repair it and what the total bottom line was? This will give them another comparison.

Also how many flights on this machine (count 15 minutes as 1 flight) before the crash?

Thanks Shiro!

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator
04-16-2008 02:46 PM
 
 
Shiro Muji
Senior Heliman
Location: Japan

Together with the Main blades and rudder blades the crashed cost me around $300 half of it is the cost of the Main blades and rudder blades. cannot post the individual parts because I already throw away the billing receipt I think they have their pricing in their site www.realheli.com.

My Heli flies 30mins for 1 tank of fuel around 550ml, this is my new machine so it has only around 23flights (not exact), cannot recall the number of flights.

Maxum with Hanson 3D Max, Maxum Nitro, Maxum 30.5cc modified engine, RH Generator, Sceadu .50Hyper
04-17-2008 01:33 AM
 
 
rbort
Elite Veteran
Location: Franklin, MA - U.S.A.

That's about average

That's what I told other folks too, average crash is $300 for a gasser.

If you flew 23 flights at 30 minutes each, then you got 690 minutes flight time. Divide that by 9 minutes per nitro flight, that's about 77 flight. At a savings of $3 per flight (cost of nitro for 1 flight), You've saved about $230 flying the gasser.

So you're only $70 behind after the crash. Just thought some people might find that interesting! Better than you thought!!

-=>Raja.

1005 Xcell Gas, BHH G26 3D Plus, Jewel Generator
Spectra-g, BHH G26 3D Plus, Jewel Generator
04-17-2008 03:52 AM
 
 
bosshoss
Senior Heliman
Location: Chicago, IL

Math

Raja, I like your gassernomics lesson. I am a hooked gasser , gasser planker that is.

I have yet to make up my mind on which gasser heli I want to start on. Bet on me having a gene from you...

It was 360 dollars for my planting of a R90.

Wanna hover??? Buy a helicopter.
04-17-2008 04:09 AM
HOMEPAGE  
 
 
jann
New Heliman
Location: Philippines

$300 average crash cost? that seems to be very conservative. i got my maxum gasser just last february and i had already suffered 2 crashes. the average cost of my crash is around $600
04-17-2008 06:40 AM
 
 
erichevy
Senior Heliman
Location: Zevenhoven The Netherlands

Sorry to hear of you're crash Shiro.
I have plunged my Robbe Futura SE gasser into earth 2 Sunday's ago.
The engine hezitated while doing a low flip which resulted in a crash with skids hitting the dirt first.
Total amount of damage is $707.65,-

From which are $507.65 are parts:
Tailblades 121mm $35.-
Tailfinset $42.-
torq tube $20.30
mainshaft $30.40
maingear $44.80
blade shaft $18,50
Stabiliser bar $14.30
Skids $32.-
Skids legs $19.60
base frame $26.75
bearing bracket $ 6.-
tailrotor hub $24.-
tailrotor shaft $23.25
tailgears $41.75
bearings(main, tail, flybar) $20.-
carbon tailboom $109.-

And $200,- for the Robbe 810 mm blades.

Eric.

Don't wan't to show my geoduck in public.
04-18-2008 02:06 PM
 
 
Shiro Muji
Senior Heliman
Location: Japan

sorry to hear about your crash erichevy, that was really an expensive crash.

Maxum with Hanson 3D Max, Maxum Nitro, Maxum 30.5cc modified engine, RH Generator, Sceadu .50Hyper
04-19-2008 12:36 AM
 
 
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Gasser Model RC Helicopters > Crashed my gasser today!
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