 As far as I was aware 27MHZ is not for use with flying models. Am I wrong??
Best Regards
Lee
|
 |
 Hi Lee, Parkzone have them in their aircraft as standard and so one can only assume it to be legal or they wouldn't be allowed to sell them surely? When the Fokke wulf was reviewed in RCM&E it had a 27mhz radio system and there was no mention of it being illegal. What with all the cars and boats on 27mhz I wouldnt like to risk it. Al
|
|
Cheers for that Al, I would most certainly not use it cos my car was always going off on its own but at least that is on tera firma lol
Lee
|
|
27Mhzs can be used for any radio control, boats cars aircraft. 35 Mhz is reserved for aircraft only.
|
|
For the definitive answer............
http://www.ukrcc.org/
|
|
AND BTW, most 27MHz gear put in planes is FM...cars, boats, etc are AM.
I have ground tested a "Red" plane on FM near a car on "Red", on th face of it the same frequency apart from the modulation used.....and while I would not fly it, there was not as much interference as you might think!!!
|
|
can anyone help,please? I know live in an area near an electric power flying club. my last clud was i.c.power.
I have anumber of planes which I wish to convert to electric and am wondering if there is a fairly straighforward correlation as regards power. ie one small plane has an os20 another a 40.I wish to keep the performace levels about the same. What would the equivalent brush/brushless be.? Iwould be greatfull for any
info.
|
|
Hi David
To get an answer to your question I would start a new thread. That way all will see your request. I aint got a clue about elec myself just starting to learn ( buying a slipstream from flying wing at the end of the month) If that counts as learning lol
Best Regards
Lee (still tx less bummer !!!!) lol
|
|
Hi David, Have a word with John Emms at Puffin Models. He will put you on the right track
Tel. No 01454 22814
Web Address. www.puffinmodels.com
All the best Allan J..TTFN
PS. I have no connection with Puffin.
|
|
I now have a number of electric flight models flying but am having trouble with glitching on two. Both are using high kv motors turning small props with pusher configuration. the same setup with front motor with a bigger prop gives no trouble. I have tried a ferrite ring on the esc to receiver leed,2 turns. The models concerned are foam Ally Cat and deppron d-tyke..I can't see the foam making a difference. I keep the esc and receiver as far apart as possible and route the arial straight to the wing tip. Any ideas please?
|
|
 Try at least 3 turns at least on the ferrite ring.
|
|
.JPG) david i would personally start a new thread in the electric flight section but i will ask are you using ppm or pcm receivers??? nasa
|
|
omg I have just seen that my last reply was a year ago. on this thread anyway  Lee
|
|
 Yeh...and you have been ignoring my emails ! was it something I said ?
|
|
HI Timbo Just got lots on mate I will ring you soon Lee
|
|
 27mhz is used for land based models like cars and boats and 35mhz is for air based models like planes and heli's 
|
|
But 27Mhz can actually be used for other types too...including aeroplanes. It is 35Mhz which is exclusive to aeroplanes only and must NOT be used for land / water based vehicles.
|
|
 27 Mhz was dropped mostly, because the frequency was adopted by a radio station. RC Aircraft were allocated with 35 mhz.
|
|
 27Mghz AM (not come across an FM version) was and is still in use for all forms of RC models. It is prone to interferance, when CB first hit the UK market it pretty much killed the 27Mghx gear and downed a lot of models. It's still legal to fly/drive models using this equipment and some low cost models come complete with 27Mghz gear, but definatly not recomended particularly for aircraft. AFAIK it would be illegal to operate a radio station on 27mghz as the frequency is alocated to RC models.
|
| Edited: 16/05/08 08:51 |
 The 27 meg radio station would have been a pirate using cb gear and a linear amplifier to boost the output. It is common practice in Italy, and possibly the states, to have linears as big as a kilowatt on the end of a cb! The radio doesn't receive any beter, just makes one heck of a row across many channels at once! There were one or two 27 meg fm sets, but they didn't 'take off' because the band fell out of use in favour of 35. An fm receiver will accept an fm transmission, (obviously) and will tend to treat an am signal on the same frequency as noise, providing the am signal is weaker than the fm one. The reverse is not true for an am receiver, though. It will try to decode the fm signal AND the am one, and end up totally confused! (Putting it very simplistically!) Two am signals on the same frequency will 'fight', and neither will have control unless one is much stronger. Two fm signals of similar strength on the same frequency will fight, and whichever one has a millivolt or so more input at any given time will have control, but as the rx is moving in space, the two signal levels will vary constantly, so both tx's will have intermittent control. I could go on in depth, but I won't. If anyone wants to follow it up in more detail, I point you at the RSGB website for starters. http://www.rsgb.org Have fun!
|
|
denotes 
