RunRyder - Radio interference on the Gasser !!!!!

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Bergen R/C Helicopters > Radio interference on the Gasser !!!!!

Terje Nilsen
Heliman
Location: Norway

I am experiencing very sporadic but still strong radio interference, or something that feels like that. In the beginning I only noticed that the tail sometimes seems to get hit by a right hook, and changes about 45deg, with the clock. After some more resurge I noticed that also the throttle and the rest of the cannels were interfered for about 100ms, then it works for a couple of minutes…

How does you guys position you’re receiver cable ?

T9

04-07-2003 Over year old.

Al Magaloff
rrMaster
Location: 12,199 Posts- Enough Time Wasted. See Ya!

Use a base loaded antenna, such as the Deans, up front, facing forward. The normal receiver wire antenna, running back, will be nothing but trouble.

04-07-2003 Over year old.

daggit
Elite Veteran
Location: Waseca MN

I second that...

I was told the same thing rcheli said when I built my gasser.

I went with Dean's with no problems, you can see it mounted to the landing gear below...

04-08-2003 Over year old.

HOMEPAGE

Malorie
Elite Veteran
Location: Paw squared, MI

Change your spark plug. Sometimes the resister plug can go bad and cause more and more trouble. They will also act like that if they get too much carbon build up.

Life's a journey, NOT a destination.

04-08-2003 Over year old.

Terje Nilsen
Heliman
Location: Norway

Hey "daggit", love you're air filter (on the picture), ware do you get it ? I ordered one from Bergen with some other stuff, but have not heard any ting sins I received the confirmation ...

Terje

04-08-2003 Over year old.

jjones
Senior Heliman
Location: Pendleton, Oregon

Just another idea here. I had twitching problems and lockouts on an x-cell I had. Probably from strong carbon frames and gas mixture and antenna running to the rear.

1. Make sure you have PCM gear. FM will always get lots of interferance.

2. Use base antenna as suggested. I mount mine in the canopy, facing forward. On the bolt that holds the small plastic tray spacer.

3. I have heard of people using a dryer sheet stuffed in the canopy somewhere to eliminate static buildup. It would probably work for these choppers.

4. plug like mal said is really the culprit, make sure your ignition is not cut somewhere and touching something. can shock your whole system.

5. route your rudder servo over the main gear if it isn't. And keep your gyro away from the rear. To much spark going on back there.

Good luck... I hate chasing these ghost problems around.

Josh Jones

Oh, and G23 accessories. check this site out. www.adaracing.com
all kinds of hop-up filters. Anybody ever think of running their tuned pipes? I bet these little scotter racers are miles ahead of the helicopter industry in terms of engine performance parts. Much like RC cars and gadgets... much more advanced.

04-09-2003 Over year old.

HOMEPAGE

Al Magaloff
rrMaster
Location: 12,199 Posts- Enough Time Wasted. See Ya!

Josh, the scooter guys do have some cool stuff. That tuned pipe is huge, and heavy. The heli stuff is designed for size, not power.

04-09-2003 Over year old.

daggit
Elite Veteran
Location: Waseca MN

Terje Nilsen...

Thanks, I ordered the air filter kit from Vario. I had to call, it was not on their website.

Actually the filter itself is just a crankcase breather filter for hotrods from K&N filters. You could get one at an auto parts store and make your own adapter. Vario makes a nice little purple anodized kit though, I didn't feel like engineering an adapter when I could just buy one

04-09-2003 Over year old.

HOMEPAGE

RobHaley
Heliman
Location: Atlanta, GA

Interference

Try Grounding your tailboom to the engine. I know this works for a belt drive. Your Bergen Gasser is a shaft drive so this trick may not help you at all but the information was free

The belt can build a static charge.

04-11-2003 Over year old.

Malorie
Elite Veteran
Location: Paw squared, MI

For the belt drive, what I found works great is to run a wire from the tailboom to the front pulley bearing block. This causes the boom and belt to remain at the same electrical potential and keeps it from being a generator.

Life's a journey, NOT a destination.

04-12-2003 Over year old.

cfranks
Veteran
Location: Adelaide South Australia

I crashed my Bergen Gasser a fair while ago because of an interference glitch. Rebuilt and set Fail Safe to drop the engine into idle if another signal loss / interference. Happened once more briefly. I then got a Vario Benzin and had the same type of interference. Investigation showed both helis gliched when they were at my furthest flying distance and 3/4 nose in, ie flying towards me at about 45 degrees. Happened at both left and right ends of the field so it wasn't external interference. I grounded the boom and the boom supports back to the engine on both helis and have never had a problem with interference since. Try it, you will like it.

Charles

04-17-2003 Over year old.

daggit
Elite Veteran
Location: Waseca MN

Just wondering how exactly you "ground" the boom and supports? pics? Is it necesary with PCM? Are you running PCM cfranks?

04-18-2003 Over year old.

HOMEPAGE

Malorie
Elite Veteran
Location: Paw squared, MI

I used a piece of wire run under one of the boom clamps, where I clean off the anodizing, to an eyelette on the other end under a bolt for the front pulley bearing block.

Life's a journey, NOT a destination.

04-20-2003 Over year old.

cfranks
Veteran
Location: Adelaide South Australia

Yes, I am running PCM, it was the FailSafe setting that alerted me. The heli at certain orientations would drop into idle for a second or so.
Grounding was a SMALL self tapping screw into the Boom with the attached wire also going back to the engine block. Take care not to screw into the tail drive shaft for obvious reasons.

A wire to each of the boom supports, again back to the engine, completed the grounding

Charles

04-23-2003 Over year old.

Malorie
Elite Veteran
Location: Paw squared, MI

I would avoid bonding the crankcase to any part of the heli. Most of the ignition noise is contained in a closed circut to the crankcase. By bonding it to a piece of metal on the heli, the ignition noise will be spread to theat part.

The points of interference I have found on the Intrepid helis are:

1. The belt (on belt driven machines) acting as a static generator. Cured with a wire run from the tailboom to the front pulley nullifying any potential difference between the belt and the tailboom.

2. Notchy or dry bearings. The first one I always check is the large ID bearing in the tail gearbox opposite the output shaft. This bearing can easily be greased by cleaning off the outer race and laying a bead of grease on the dust cover and forcing it through the bearing with the palm of your hand. The second one I check is the one on the top of the pinion gear. These are the two hardest working bearings in the whole heli and usually dry out first. After those two, start checking them all.

3. The spark plug. You will know if you have a bad one as you will get a ton of interference from it.

I have rarely found an Intrepid Gasser that wasn't cured with one of these things.

Best of luck,
Keep us posted,
Malorie

Life's a journey, NOT a destination.

04-23-2003 Over year old.

Terje Nilsen
Heliman
Location: Norway

I've added the Futaba 401 Gyro, but suprisingly it got problems to lock the tail. It tends to "drift" with the clock, in head hold (AVC) mode.

Can this be caused by the new tapes FUTABA uses that does not allow the GYRO to damp the extra vibration created in a GASSER ????

Othat than this it now flies great !!!!
Than you for the sugestions, I fly with the antena out front, no problems...

I alsow whant to tank Bergen for a fine support, even thow a litle slow response at times...

Terje

05-06-2003 Over year old.

Malorie
Elite Veteran
Location: Paw squared, MI

Definately possible that it is a vibration dampenning problem. I have cleared numerous tail drifting troubles with the GY401 on the Intrepid Gasser with the green goo tape.

Best of luck,
Malorie

Life's a journey, NOT a destination.

05-07-2003 Over year old.

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Bergen R/C Helicopters > Radio interference on the Gasser !!!!!

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