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GrandRC . CanoMod . Futaba-RC

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Aerial Photography and Video > Winter or cold weather flying
 
 
daytonabeach
Key Veteran
Location: Oslo, Norway

LOL

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
10-30-2008 08:01 AM
HOMEPAGE  
 
 
aambrose
Elite Veteran
Location: Pana, IL

Quote 
How in de hell do you do this so fast?
He thinks this stuff up ahead of time and has a complete library of wacky images! Simply pulls from his hat what is needed at the time!


Tony
10-30-2008 06:27 PM
 
 
Envision
Senior Heliman
Location: MI

Quote 
It'll be cool to fly FPV inside a heated cube van!

Seriously, I hope the roof and walls are not aluminum or steel. Is there some sort of antenna that can be plugged into the radio and left outside or on the roof? Even aftermarket window tint has some steel in it. The window tint on my home limits the cell signal.

Troy
10-30-2008 06:44 PM
 
 
nooobs
Key Veteran
Location: Toronto, Canada

Quote 
How in de hell do you do this so fast?

I hear ya Steve...

You gotta love broadband... and Google!
10-30-2008 09:13 PM
HOMEPAGE  
 
 
daytonabeach
Key Veteran
Location: Oslo, Norway

Regarding acclimatizing the heli, gyro and stuff. (not batteries)

How important is it REALLY?
Have anyone actually proven that taking a heli right out of a warm car and start flying 5 minutes later can cause anything?

I would say its worse to take it from cold to warm than the other way, fex, if you have been out in the cold with glasses on, they starts to fog up immediately when you get inside the warm house, but not the other way.

That said, could the repeated build up of condense inside the components destroy them over the time?

Slow down the acclim process, fex, just leave the heli in the car and let it cool down with the air inside for 10-15 min?

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
10-31-2008 09:43 AM
HOMEPAGE  
 
 
nooobs
Key Veteran
Location: Toronto, Canada

Mmmm... not sure but I've heard of cases where the gyro freaked out when flying in the cold.

If my heli is going from home to car to field I normally leave the heli out in the cold for a few minutes. It normally takes time to setup anyway so while preparing the rest of the gear the heli is acclimatizing.
10-31-2008 09:57 AM
HOMEPAGE  
 
 
daytonabeach
Key Veteran
Location: Oslo, Norway

Yea, in many cases i also do the interior pics as well as the airshots, so a good routine could be to start inside and leave the heli in the car for 30-40 minutes, that way it slowly cools down, including myself

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
10-31-2008 10:19 AM
HOMEPAGE  
 
 
ehx
Senior Heliman
Location: Northern Minnesota

"Regarding acclimatizing the heli, gyro and stuff. (not batteries)

How important is it REALLY?
Have anyone actually proven that taking a heli right out of a warm car and start flying 5 minutes later can cause anything?"

Sure it can. I used to fly a JR Voyager E during lunch breaks where I'd take it out of a warm building to below freezing temperatures giving it only a couple minutes (not enough time) to acclimatize. I did this on purpose for fun/practice as the tail would start adding its own inputs 30 seconds to a minute into the flight. This was with a primitive JR 400 gyro. Modern gyros have much better temperature compensation.

My guess would be that anything from a Futaba 401 or JR 500 on wouldn't really have a problem, but I don't want to risk a nice camera ship to find out. Either I wait 10+ minutes or the heli has been transported at ambient temps.
10-31-2008 06:29 PM
 
 
daytonabeach
Key Veteran
Location: Oslo, Norway

How does Rx NiCD/Nimh batteries react to cold compared to lipos, about the same as a123s?

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
10-31-2008 07:43 PM
HOMEPAGE  
 
 
ehx
Senior Heliman
Location: Northern Minnesota

I've never used A123s, but, in general, NiCads hold up better than NiMH and lithium ion do better than lithium polymer.

This brings up an important point though. It's one thing to take out your heli from room temperature to say, 10F (-12C) temps and fly within 10 minutes. It's another when the heli has been in the cold temperatures for hours. Obviously if your receiver batteries are really cold they won't have the same power. Ten minutes in the cold won't completely cool even a ~2500mah receiver battery. It depends on how the battery is mounted, but it can take an hour or more until it completely cools off.

If you are using a BEC then just keep your main batteries warm until you use them. If your receiver batteries will be in the cold for a while before use test them. I currently use a 2600mah Lithium-ion 2S pack to power a regulator. The battery still supplies enough power to operated the servos after being cooled to 0F (-18C), but the voltage is quite borderline. For a little headroom I won't fly this pack below 10F and even then only for one flight.

Other things like servo linkages really tighten up in the cold. To about 25F my Maxi Joker linkages are fine. By 15F they are WAY tighter. If you are flying a gasser watch out for brittle main gears. Especially when the heli has been sitting in the cold and, of course, engine tuning in the cold can be especially hazardous to the gears.
11-01-2008 02:02 AM
 
 
daytonabeach
Key Veteran
Location: Oslo, Norway

How does the tight links affect the flight, more jerky movements?

How about moving the servos back and forth for a minute before takeoff, to "warm" them up a bit?

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
11-01-2008 08:20 AM
HOMEPAGE  
 
 
Seablade
Key Veteran
Location: floating around

trackhead and nooobs, where did you get your Tx mitts from?

"Vini, Vidi, Velcro"
11-01-2008 11:31 AM
 
 
nooobs
Key Veteran
Location: Toronto, Canada

Got mine at my LHS.

Here's the site...
http://www.raydiowarm.com/
11-01-2008 11:34 AM
HOMEPAGE  
 
 
daytonabeach
Key Veteran
Location: Oslo, Norway

Ok, whos gonna be the first one to invent fine adjustment of alu booms?

I mean, there are only a couple of millimetre adjustments needed to tighten the belt in cold weather, cant be that difficult?

Split the boom, thread a size bigger tube over the boom, and fix it some way with set screws, something similar to a telescope patent...?!?

And, how tight can the belt be before it gets damaged, i mean, the process after you get inside warm temps again when the boom extends...

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
11-01-2008 04:44 PM
HOMEPAGE  
 
 
nooobs
Key Veteran
Location: Toronto, Canada

No need.

There is enough "boom" inside the the tail boom block for adjustment.
11-01-2008 04:49 PM
HOMEPAGE  
 
 
ehx
Senior Heliman
Location: Northern Minnesota

"How does the tight links affect the flight, more jerky movements?"

Sluggish movements. Usage helps, but they are still tighter and require more power.

Everyones setup is a little different. If you plan to fly in the cold test the heli in temps even colder then you plan to fly in. Put the heli outside at night for an hour or so and check the servo movements, etc. Maybe even attach it to a Rotopod or similar for safety and slide it along/near the ground checking the response.

For temps just a few degrees below freezing most setups won't have any issues. If you get a fair amount colder that's where you have to pay more attention.
11-01-2008 07:19 PM
 
 
daytonabeach
Key Veteran
Location: Oslo, Norway

Quote 
There is enough "boom" inside the the tail boom block for adjustment.

I was thinking even more easier, with the block youll have to losen 4 bolts each time, and the nylocks get worn out for each time...

Something done without tools, a quickrelease and safetylock in some way...

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
11-02-2008 09:24 AM
HOMEPAGE  
 
 
nooobs
Key Veteran
Location: Toronto, Canada

The tailboom is not something you want a quick release with.

Remember Andrei's mod on his tail?
11-02-2008 09:28 AM
HOMEPAGE  
 
 
daytonabeach
Key Veteran
Location: Oslo, Norway

I see...

Andrei, no?!

Never argue with an idiot, he'll drag you down to his level and beat you with experience...
11-02-2008 11:02 AM
HOMEPAGE  
 
 
nooobs
Key Veteran
Location: Toronto, Canada

Steve

This video is for you. I just had to test out your ground wiring. Told ya!

http://www.youtube.com/watch?v=rxRt_1jFMgw
11-03-2008 05:22 AM
HOMEPAGE  
 
 
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Aerial Photography and Video > Winter or cold weather flying
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