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05-05-2005 06:22 AM  12 years agoPost 1
ddang

rrApprentice

Corona, CA

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For those who have nice scale model, esp. turbine one, how do you avoid someone at the field using your channel by mistake? I know about frequency flags and markers but there always those oops (or sabotage).

Is there a radio that only recognizes its receiver?

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05-05-2005 11:26 AM  12 years agoPost 2
PETER ROB

rrElite Veteran

Devon UK

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Gregory, Yes a hand held scanner is a must, Graupner/ JR have brought out a synthesized RX and TX with dial up frequencies with a greater output, anyone switching on to your frequency will be swamped Transmitter T35 SYN FM Graupner code 3859 Receiver 10 chanel SMC 20 DSYN Graupner code 7031

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05-05-2005 12:53 PM  12 years agoPost 3
Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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having a scanner is a great idea and it sure doesnt hurt to have good equipment. however, that can all be more expense especially for a new guy or one operating on a minimum budget. at most clubs, the rule is if you do not have the pin or proof of possession of a frequency at the time you are using, and you shoot someone down, you are responsible for the other guy's model. if youfly at a non club field likei do all the time, it is up to you to make sure everyone is aware of each others channel and take turns if there are any sharing the same channel. interferance is almost unavoidable in some cases but you risk what you can afford to. this especially when flying in a spot you choose at random. a scanner would certainly help there.
i have been shot down once while flying a clubmembers model. i had the pin, the guy in the pits didnt, he had to pay for the replacement. more than likely, he will be way more careful next time.

drive a rotary, fly a rotorcraft

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05-05-2005 01:38 PM  12 years agoPost 4
Cap232ex

rrApprentice

Amanda, Ohio

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A scanner is nice but it will not help you if the guy at the back of his van turns on after you take off Ask me how I know

Charles

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05-05-2005 05:41 PM  12 years agoPost 5
ddang

rrApprentice

Corona, CA

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Thanks for all the replies. I didn't want to spend days building my scale and get shoot down in a few seconds.

Where do I get a scanner?

Gregory, how do set up dual receivers?

Dave

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05-05-2005 07:13 PM  12 years agoPost 6
seattle_helo

rrKey Veteran

Seattle, WA USA

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Yeah, getting shot down is a serious concern with any aircraft but at the turbine level it takes on whole new proportions. To my knowledge, the setup that Gregory has is currently the best possible protection but even then it would not necessarily prevent a concerted sabotage attempt. God forbid.

Scanners are a great idea (spectrum analyzer even more so). But I wish we had some better options for RC gear that addressed the whole RF link and made it the very best it could be. Personally, after putting $8k into a helicopter I would much rather buy a simple 9 channel radio with a bullet proof, totally secure RF link than a radio with 20 channels that can play music and uses the same ol' same ol' RF components. I am anxiously awaiting the new radio from JR and can only hope they raise the bar. Here in the USA I'm sure the FCC puts any new RC frequency spectrum requests at the very bottom of the priority list so a radically new and better RF scheme may never happen. Perhaps the existing xx.xxx MHz band can be retooled for spread spectrum or some other method but that would cause potential grief with all the existing equipment.

Oh well. For now I'm going to partially duplicate Gregory's setup with dual receivers as a start. For more information on that setup, Dave, look here:


http://www.rc-electronic.com/html/e.../dpsi_twin.html

As far as scanners, some good suggestions are ICOM, Yupiteru and AOR. A search online will bring up many vendors and info about any of those.

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05-05-2005 08:26 PM  12 years agoPost 7
Cap232ex

rrApprentice

Amanda, Ohio

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Gregory,

Question, how do the servos know which receiver to follow when one goes into fail safe?

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05-06-2005 05:29 AM  12 years agoPost 8
eitanh53

rrVeteran

ISRAEL

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We have small frequency blackboard - Every flyer write his freq, But I
don't have any problem - most of the time my friend & I alone in our area we have different ferq.

see my gallery

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