Problems!! 14MZ 2.4 R6014FS

[Flyfalcons]

I don't see this as much different than the Spektrum brown out issue.

New Technology - Unintended Issues - Eventual Fix

[Judge]

	Quote: Originally Posted by zzw26n
	C'mon Judge, I expect more out you then the above suggestion. No one wants to remove and replace their Hatch-Canopy five times a day. I'll Fly Futaba 72mhz this year, but .... several Members at my Club have switched to the dark-side and I can't blame them.

Like I said, it is a PITA, but it would help I am certain. Not as good as an engineered fix, but in the interim it would be very effective.

And I still say that if it's that hot out I am in the AC for sure!!!

[Judge]

	Quote: Originally Posted by Flyfalcons
	I don't see this as much different than the Spektrum brown out issue. New Technology - Unintended Issues - Eventual Fix

I agree completely.

Take it a step farther. JR/Spektrum went from single RXs to the current multiple satellite receiver arrangement in response to real world results. The initial design did not work as well as they had intended, so they changed it based on what the end user was doing. This is the way it usually works.

[Jurgen Heilig]

I did my temperature increase tests at 5V. As nobody repeated them with other voltages, I run some more tests with 6V:

R6014FS - Room temp. 25°C

After 5 minutes 30.7°C, after 15 minutes 32.5°C, after 30 minutes 34.4°C

R617FS - Room temp. 25°C

After 5 minutes 34°C, after 15 minutes 38.4°C at the bottom of the case.

The higher the supply voltage, the higher the temperature differenz between rx and ambient temperature. It does not seem to be linear.

Jürgen

[rcdart]

	Quote: Originally Posted by Judge
	One other thought. It's a bit of a PITA, but what about taking the hatch cover/canopy off between flights to let the inside vent to atmosphere? This way the solar oven has no chance to get going. And you can cover the insides with a towel too. Just a thought.

Not only does it cool the inside of your plane, but gives the opportunity to have a good look inside for other developing problems, something that should be done anyway.

[Mithrandir]

	Quote: Originally Posted by zzw26n
	C'mon Judge, I expect more out you then the above suggestion. No one wants to remove and replace their Hatch-Canopy five times a day. I'll Fly Futaba 72mhz this year, but .... several Members at my Club have switched to the dark-side and I can't blame them.

There is some merit to this as it would allow opportunities to inspect between flights...

How many people have opened their plane to learn a wing bolt came out or one aileron servo unplugged?

[diamondave5]

i was wondering if a floor and pilots would help, if i put a floor in i have to add a pilot, just not certain of inside temps say in the back of the plane, not under the canopy, if you do that i guess you need to use longer extensions for ail and such that you unplug for transport, i will still let others try it 1st, hehe

[jimbomilligan]

How about a mini compressor, condensor and evaporator for some cocpit AC ?

[Julez]

	Quote: Originally Posted by Jurgen Heilig
	Hi Julez, could you please check for components which fail at even lower temperatures? You know I started a thread on RC-Network about potential heat issues with 2.4GHz systems. Two models crashed last weekend wit R608FS on board. During ground tests, three R608FS failed at just 45°C (=113°F). Jürgen

Well, in my 606 Rxes, the tranciever was the only component failing. When the R failed after heat gun threatment, I gave each component a quick dash of CA kicker for cooling purposes. Instant recovery was only observed when said dash hit the transciever chip.

Concerning the 45°C: Earlier in this thread, it has been mentioned, that some temperature measuring devices can be up to 15° off.

[tobytorkn]

i have read a couple of times in this thread about why jr uses mutiple receivers for 2.4. why is it that futaba does not have to use multiple receivers placed in different configurations throughout an aircraft? i read about line of site, etc. what is the difference about futaba that excludes it from the same technique used by jr and now supposedly xps is going to multiple receivers as well? i would like a technical reason, not a guess. julez, any ideas? thanks, toby silhavy....

[diamondave5]

	Quote: Originally Posted by jimbomilligan
	How about a mini compressor, condensor and evaporator for some cocpit AC ?

you may want a mist system instead of an evaporator, the humidity is generally in the single digits around here(except for fromerely named "monsoon" season), after about 2 weeks of living in arizona my nose was hurting, turns out it was because it was filled with pebbles

[Jurgen Heilig]

	Quote: Originally Posted by Julez
	... Concerning the 45°C: Earlier in this thread, it has been mentioned, that some temperature measuring devices can be up to 15° off.

Are you sure? I can't remember having read anything like that and the search function also does not find anything.

Jürgen

[dick hanson]

stuf whut works:
tint the canopy-
provide an air outlet at rear of model - flying will extract air and movin air tends to balance temps internally those who remember --kwow that opening slightly, the drivers wing window and the rear passengers' window - created a fast cool down in the car.
avoid direct sunlight -if your rx does not like it
worse is direct sunlight thru a window into confined spaces
throw a towel on it when not flying - a white towel is best.
I stick my rx in the pilot's compartment - no problems but I don't leave the model setting in the sun.
You could build a white expanded foam box for the radio - this stuf is the best for insulation but the effort really isn't needed.
I wonder when some enterprising ARF maker will do a canopy which side hinges and includes quick releases on one side .
my little EFlite models use magnet setups which really work-but on a big shaker - too risky.
DZUS fasteners work but I don't see anyone adapting them

[mc3854]

I'll tell you something funny about the servos moving when you turn on the radio. If you have it in a helicopter it doesn't do that! Don't know what it the difference but the 14, 2.4 in airplane mode causes the servos to move when turning on! Same receiver in helicopter mode does NOT cause them to move when turning it on! Go figure!

[DR10044]

My 6ex deflects the servos, all analog, when it is turned on. My 12fg does not, all digital servos. I am not sure if that is the difference or not. Unless one of the servos is on a retract, which none of mine are, it is not an issue for me. Since it is not an issue for me I have not tried to see if I can stop it from happening.

By the way, the 6ex performed without a hitch last summer. I flew on many a 90 degree day.