Problems!! 14MZ 2.4 R6014FS

[Jurgen Heilig]

	Quote: Originally Posted by bgold
	I am a member of two clubs, one is mostly JR/Spektrum and the other is mostly Futaba. I think it's a bit of follow the lead dog.

Rather than following a "lead dog" I bought both systems, did my own tests and still use both systems - depending on the type of model. Both systems have their Pro's and Con's.

Jürgen

[grayuk]

	Quote: Originally Posted by Jurgen Heilig
	Well, I don't want to get too Off-Topic, but I have a US DX7, a EU DX7, a UK DX6i, a T6 and a T12. Measured at our flying field (tx approx. 1m off the ground, rx approx. 1.5m off the ground), I achieve approx. 470m with the EU DX7 (or with the DX6i with EU power setting), approx. 700m with the US DX7 (or the DX6i with US power setting) and approx. 1030m with the T6 (R617FS) or the T12 (R6014FS). After Cisco sytems filed an offical complaint against the use of 100mW 2.4GHz systems for RC, a TCAM meeting is scheduled for the 14. May 2008 to find a solution. Jürgen

Can you give me more on this Cisco issue?

Paul

[Jurgen Heilig]

	Quote: Originally Posted by grayuk
	Can you give me more on this Cisco issue? Paul

Unfortunately in German only:

http://www.amberg-modellfliegen.de/2...Presseinfo.pdf

Jürgen

[martin18152]

You will not be able to keep it cool enough inside the fuselage during the summer. We tried. You will be defiantly taking a risk. For the guy that said he tried to fail the RX's and could not?! I believe he has the only two RX in the country that will not fail under these conditions. Let Futaba know what you are doing correct because we would like to get in the air ASAP!!! And I mean not my day job!!!

I disagree with this statement, unless your outside temperature is 130 deg. F. It might be true if your plane is entirely black and sealed with no airflow, or your receiver is in the focal point of your canapé. I find that some post, not all, have a complete lack of understanding of the three modes of heat transfer.

My receiver temperature was at approximately 300 deg K this weekend with no problems, lol.

[xed]

	Quote: Originally Posted by martin18152
	My receiver temperature was at approximately 300 deg K this weekend with no problems, lol.

Sorry but why are you expecting to experience problems at just above ROOM temperature?

[fastford]

Well I have modded my recievers for the mean time. I bought 2 speed controll fans and put a series of small holes in bottom cover of reciever and mounted the fan to cover. The fan plugs right into an open port in your reciever. This will draw air thru the reciever any time it is powered up. I know this isnt what you want to hear but for the time being I will still be flying.

Jason Cohen

[Simpleton]

	Quote: Originally Posted by martin18152
	or your receiver is in the focal point of your canapé.

I hate to be a pedantic nit picker, but a canapé is finger food you eat at a cocktail party, a canopy is the clear cover over a cockpit. Probably just the spell checker keying on the wrong word.

[martin18152]

hate to be a pedantic nit picker, but a canapé is finger food you eat at a cocktail party, a canopy is the clear cover over a cockpit. Probably just the spell checker keying on the wrong word.

Never could spell.

Sorry but why are you expecting to experience problems at just above ROOM temperature?

It's actually 80 F, I thought I was making a joke, to lighten things up, I guess you did not get it.

[grayuk]

	Quote: Originally Posted by Jurgen Heilig
	Unfortunately in German only: http://www.amberg-modellfliegen.de/2...Presseinfo.pdf Jürgen

Can you give us an idea of what it says?

[Jurgen Heilig]

	Quote: Originally Posted by grayuk
	Can you give us an idea of what it says?

2.4 GHz R/C Systems

R/C Systems using 2.4GHz have been subject of discussions by national and international communications authorities. Meanwhile other users of the 2.4 GHz band became aware of the use of R/C systems with a radiating power of 100 mW EIRP (Subclass 22). Especially the distributors of RLAN equipment are not amused about that.

At the CEPT/ETSI meeting from 13.- 14 September 2007 in Sophia Antipolis, a representative of CISCO launched a request, that 100mW EIRP (Subclass 22) should be reserved exclusively for WLAN, Bluetooth etc. As an example of the "abuse" of Subclass 22 radio control systems for model airplanes was used. The quite powerful lobby of RLAN users would like to ban those applications and judging by previous meetings, the representative of CISCO at ETSI is known to be a very strong supporter of this goal.

When the Model Flying Section of the German Aero Club got informed by this "attack" on R/C applications on 2.4 GHz, a request for clarification was launched to the German Communications Authority. They confirmed in writing, that their attitude towards R/C systems in accordance with EN 300.328 (100 mW max. EIRP) has not changed and that the usage remains legal.

From 31st March to 1st of April, the regular TCAM meeting took place in Luxembourg. The TCAM is the EU expert group which deals with conformity issues according to the R&TTE directive.

Prior to this meeting information became available, that 2.4 GHz R/C applications would be a topic there. In order to represent our interests, an "R/C Consortium" was formed, consisting of the following members: ACT, DAeC, DMFV, Graupner, JSB, Multiplex, RC-Network, Robbe, Simprop and Weatronic.

[grayuk]

Thanks for the translation.
Am i reading this right, is this just a German issue or could it be Europe wide?

Thanks

Paul

[Prof. Dr. YoMan]

Europe. Not only germany. Its possible that 2,4GHz for RC gets banned in the EU.

[Jurgen Heilig]

	Quote: Originally Posted by Prof. Dr. YoMan
	Europe. Not only germany. Its possible that 2,4GHz for RC gets banned in the EU.

Considering the thousands of 2.4GHz systems already sold, I think it would be quite difficult to control a ban and most likely the existing ones could be used further.

Jürgen

[diamondave5]

well i just joined this site, i did have the exact same problem, i started a post on rcunivrs and was given this link, i was at the field last weekend with my 88" yak, put it together and flew once in the morning, then the field was closed for weed pulling and such(getting ready for shootout already,hehe), my plane sat in the sun for 3 hours or so, i didnt cover it because in my mind it wasnt that hot out, like mid 80's or so, and i know i have flown with my pcm stuff where sweat was driping in my eyes and my hands were slippery on the radio from sweat, and never had any problems, so anyway the field opened back up around 11:30 or so, fired it up, i do a rutine every flight, the 1st one of the day inculdes a range check, anyway i bring the rpms up slow, then full, then i goose it a few times to make sure its running and transitioning good, i lost signal when "goosing" it, i was literally seconds away from taxying out, i turned reciever off, it came back, refired lost again, did that 3 times before packing up, got home and took it out of the plane, would not fail with a few servos hooked up to it, tried for 15-20 minutes, i put my pcm back in and went out sunday which was even hotter out, had no problems and flew all day, so i believe there is a definet issue and needs to have a solution quickly, i wouldnt be able to fly here(tucson) anytime after 9 or 10 now, and its only going to get warmer for the rest of the season, even if it was proved to be the reciever and futaba would reemmberse for the plane, i dont want to start all over or see a plane go down like that, it will happen around here, i just think its a question of when, i dont want to see it happen and i have been letting everybody i know about the problem, i am keeping a close eye on all this, meanwhile my $500 investment(8 channel module, 2-617's, and 1-8 channel) to "upgrade" my planes is nothing more than a door stop at this point, until fall amd cooler temps i guess, it was a new version of the 617 recievers that i was using, so this issue seems to span several different versions of the 2.4 fasst stuff, i plan to stick with my futaba 9c and have no immediate desire to change brands just to get 2.4 stuff, but am kind of dissapointed and for sure leary, makes me wonder what other unkowns may be out there

[Jurgen Heilig]

	Quote: Originally Posted by diamondave5
	... i have flown with my pcm stuff where sweat was driping in my eyes and my hands were slippery on the radio from sweat, and never had any problems. ...

I think you were just lucky. Try to find an R/C equipment manufacturer who will give you an operational temperature range over 60°C. Good luck!

Even servos have a range from -20°C to +60C.

If you exceed the specs, you are responsible in case of a crash.

Jürgen