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02-08-2006 10:28 PM  12 years agoPost 1
BARTGALAMBOS

rrVeteran

Huntsville, Alabama! U. S. A.

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Hi Folks,

I just had a out of body experience! I was test flying my R90SE and the radio became intermittant. I thought it was over with and into my bay window! I gave it full forward and collective and ran out of the way (it was in backwards flight coming towards me). It grabbed at the last second and I autoed it to the ground and shut down the engine.
Still in shock, I guess I have some interference or something. Any ideas?

Bart

Precious Metal Investor!!!

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02-08-2006 10:31 PM  12 years agoPost 2
Ruff

rrVeteran

Queen Creek, AZ

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Range check it, both with the engine off and running. (Have a helper hold on to it)

Check the antenna. I had a wire break on a revolution antenna and it crashed my 90SE at ten feet.

Ruff

http://srcha.com

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02-09-2006 03:11 AM  12 years agoPost 3
Rick_H

rrKey Veteran

Boulder City, Nevada

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Ruff

Let me get this right. You telling someone to Have a helper hold a running Raptor 90SE during a range check

I don't think sooooo.

Rick

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02-09-2006 04:15 AM  12 years agoPost 4
BJames111

rrElite Veteran

San Diego, California

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I'm having a similar problem, I range checked it (engine off) with the radio antenna down and I walked for quite a ways (at least 100 feet) with no problems.
what else?

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02-09-2006 04:28 AM  12 years agoPost 5
BARTGALAMBOS

rrVeteran

Huntsville, Alabama! U. S. A.

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I just ordered another receiver and crystal from TH. I hope this is the problem. It was raining, when I encountered this problem, almost a mist. I am a Ham Radio Operator and I am thinking hard about this. They say that people like being around water falls, like Niagara Falls, because it makes them feel good. Scientists think it has to do with the Ionization effect. I wonder if the slight mist in the air and the blades (forcing the ionization towards the antenna) could cause interference like the skip in the ionosphere that Hams use.

All I know is that to see a $3,000 machine coming towards you out of control sucks.......

Bart

Precious Metal Investor!!!

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02-09-2006 11:19 AM  12 years agoPost 6
BlakeMcBrayer

rrElite Veteran

Georgetown, Ky

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(Have a helper hold on to it)
Pick a helper that you do not like and are wishing to injure or kill.

Geeeez, some of the things that people suggest, blow me away! .

.

Don't come off the throttle untill you see your GOD!

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02-10-2006 02:13 AM  12 years agoPost 7
BARTGALAMBOS

rrVeteran

Huntsville, Alabama! U. S. A.

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Update.......
Good Evening Folks,

I went to the LHS and purchased a Hobbico 72MHz Frequency Checker. I ordered a new receiver and crystal and I will send the current one to be serviced. I conducted a search and I have removed the antenna from the carbon fiber tail support boom as others have who have experienced lockout.
I cleaned the TX antenna with alcohol. I conducted tests with the antenna collapsed and then again with the engine running. I experienced no interference today.
I have the Frequency Checker on as I type this and every now and then it catches a frequency, but not channel 44, the channel I use.
Conclusion: it may have been the moisture; it may have been harmful interference; it may be the crystal: it may have been the RX antenna being strapped to the CF tail boom support braces thus changing the length of the antenna.
I have not removed the bearings as of yet to see if they're pitted. I only have 26 or so flights on this machine. I did receive from Rick's PV0436-L - and moved the mixing arms to the inner hole! I can't wait to see this thing roll, ONCE I trust it again.......

Bart

Precious Metal Investor!!!

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02-10-2006 04:50 PM  12 years agoPost 8
ScareCrow_Delta

rrVeteran

Sebastian, FL

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conducted a search and I have removed the antenna from the carbon fiber tail support boom as others have who have experienced lockout.
Carbon fiber and antenna don't mix. Carbon fiber is conductive, antennas don't like conductive anything other than it's own conductor. Also metal to carbon contacts make interference, i.e the head of your engine hitting the carbon base plate of the airframe on vibrations. Also the carbon horizontal fins must be separated with a plastic washer in between the fins and the metal mount so no carbon to metal contacts exist on this high frequency vibration susceptive tail boom.

~~~~ Defy the laws of gravity....gracefully ~~~~

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02-10-2006 05:51 PM  12 years agoPost 9
IFHELI

rrApprentice

Woonsocket,RI

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There`s nothing wrong with holding the heli at an idle and doing a range test. You slowly walk away from the heli to the right distance or stop at the glitching spot and walk back in towards heli. I can tell you from experience that I can hold the head and boom of a 90 size bird and burn the clutch / liner out and not lose control of heli.

Keith

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02-10-2006 08:18 PM  12 years agoPost 10
jsenicka

rrProfessor

Eagle River, WI

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I had an interesting glitch problem on an R50.
I had tha antenna routed via plastic tube back to boom.
Was a bit long and tail rotor wound up flaying last 1/4 inch of antenna. Didn't think about it till bare wire touched tail boom occasionally and shorted. Glitch like crazy.
replaced antenna with base loaded whip and have had no issues.

Jim Senicka
Team Manager, GrandRC Flight Team

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02-10-2006 10:29 PM  12 years agoPost 11
fran

rrVeteran

HONEA PATH, SOUTH CAROLINA

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I had a NEW 9ZHPS Futaba that would stop transmitting in flight!
I lost an X-Cell Stratus and two planks before (and it took 3 times) Futaba techs actually caught the problem. They said they were srry over my loss and sent me a new Radio system. I never opened it; I sold it, NEW in the box.

I've been flying RC since early 1960's and have NEVER had this happen before!

Fran

FRAN SR. ( FAI-F3C)

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02-10-2006 10:42 PM  12 years agoPost 12
ScareCrow_Delta

rrVeteran

Sebastian, FL

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I can tell you from experience that I can hold the head and boom of a 90 size bird and burn the clutch / liner out and not lose control of heli.
But what if you do??

~~~~ Defy the laws of gravity....gracefully ~~~~

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