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HomeAircraftHelicopterBeginners Corner › from dropping my radio
02-12-2006 04:39 PM  12 years agoPost 1
Tommy Z

rrKey Veteran

Lubbock, Texas

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ok, i fixed (my radio throttle stick) it and the stick seems to be ok. (the spring in it is doing good). now, what im worried about is the electronics. do i have to worry about that?!? im afraid to test it because its an electric helicopter, and if it is messed up, as soon as i plug in the battery it COULD just go full throttle on me. is there a safe way to check this guys??!!?!?!?! i really want to fly my tiny beast.
-tommy

-Tommy Boy

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02-12-2006 04:58 PM  12 years agoPost 2
ppridday

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Detroit Lakes MN

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just disconnect your motor wires to check out the rest of the electronics...

Paul

"There's someone in my head, but it's not me..."

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02-12-2006 07:28 PM  12 years agoPost 3
Tommy Z

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Lubbock, Texas

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i can't do that because i need to see if the throttle works, like if the motor wont just randomly go all out on me, any other ideas

-Tommy Boy

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02-12-2006 07:36 PM  12 years agoPost 4
Raffy

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Chicago, Illinois

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If you can't sleep over it, send the radio in for repair via your local hobby shop.

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02-12-2006 07:39 PM  12 years agoPost 5
ppridday

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Detroit Lakes MN

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After you check out all your other setup, remove the head from the swash up and plug in the motor. Doesn't matter if it fires up then...


Paul

"There's someone in my head, but it's not me..."

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02-12-2006 08:47 PM  12 years agoPost 6
Tommy Z

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Lubbock, Texas

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ooooh... now you guys are thinkin. haha, thanks for the advice/help. ill let you know how it turns out.

-Tommy Boy

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02-12-2006 09:39 PM  12 years agoPost 7
bagobitz

rrVeteran

saddleworth,lancs,UK

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what if you wired a light -bulb of suitable voltage-rating,in place of the motor (easier than dismantling the head ?) that would give you an accurate indication , I would think.

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02-12-2006 09:41 PM  12 years agoPost 8
Tommy Z

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Lubbock, Texas

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that's the most random thing iv'e ever heard, but surprisingly, i know it would work. thanks

-Tommy Boy

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02-13-2006 12:18 AM  12 years agoPost 9
biggster

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Harrisburg, Pennsylvania, USA

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take off the blades and test it

Fly the blades off it !!

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02-13-2006 01:54 AM  12 years agoPost 10
Yug

rrMaster

UK. Herts

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disconnect the motor and do a range check.

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02-13-2006 02:11 AM  12 years agoPost 11
Tommy Z

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Lubbock, Texas

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whats a range check? i cant disconnect the motor because i need to see if the throttle works. so...whats a range check??

-Tommy Boy

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02-13-2006 01:27 PM  12 years agoPost 12
bagobitz

rrVeteran

saddleworth,lancs,UK

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Turn on TX (transmitter) Turn on RX (receiver)
Assuming your TX has a telescopic aerial, keep it folded down to it's shortest (this will give you your LOWEST strength output )
now move them apart (one suggestion I picked up here on RR,- put TX down,walk away with model)...when servos start "jittering", you've lost radio contact. this is your range-check.
the usual way , is to walk off with the TX and periodically move the sticks ,checking for response on the model.
IIRC, the clear "line of sight" target is 400 feet,less with your back to the TX,as your body will shield the model from the signal.


with the aerial extended, you should get OUT_OF_SIGHT contact, that is, the radio contact should still be good when you can only see the "other half "of the TX -RX setup , with binoculars.
off the top of my head, 1/2 a mile is a typical value.

(that's why you test on much-reduced TX power, but DON'T habitually leave the TX switched -on with the aerial lowered,-you'll tend to overload the output stages of the TX, due to the collapsed aerial giving the wrong loading. )

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02-13-2006 06:55 PM  12 years agoPost 13
bbeverlie

rrKey Veteran

Hudson,New Hampshire.USA

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You can also just put weights on the landing skids, I
use a 5lb steel dumb bell. I do this when I track
my blades it also let me check all other radio functions
without worrying about lift off!

AMA#846952

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02-14-2006 02:23 AM  12 years agoPost 14
Tommy Z

rrKey Veteran

Lubbock, Texas

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thanks bagobitz, sounds a little complicated, but how does that help me test my throttle and rudder?. and i hate to ask, but whats a telescopic aerial?
and thanks bbeverlie, what i was doing was running a long stick through the skids and standing on it to test tracking, but i didnt even think of that to test the radio after i dropped it,
all of you guys are so helpful, dont know where i'd be w/o you guys...(maybe my garage working on tons of broken parts?)
thanks again,
-tommy

-Tommy Boy

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02-14-2006 09:34 AM  12 years agoPost 15
bagobitz

rrVeteran

saddleworth,lancs,UK

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TELESCOPIC AERIAL - that's the one on top of your TX. usually chrome-plated,It's several sections of tubing of decreasing diameters,arranged concentrically and able to slide freely, one within the other.
The largest is fixed and electrically connected to the electronics .each smaller section has small(usually phosphor-bronze) wipers in the base to ensure electrical continuity with the section which holds it. It will be noticeable that each section is also "rounded inward" at the top.It is is not the "sharp edge" cut off, but it's actually turned over (swaged )to form a retaining lip,past which thewipers of the next-in section will not pass.the fonal sectoion is usually solid wire with a convenient button to grip for extending/retracting,making the sharp end safer.
I just wrote all that, then thought "hey, every portable transistor radio I ever saw,had a telescopic aerial on it"...you tugging my chain,tzento?
OK , Get a helper. turn on TX (aerial DOWN) turn on RX. the person in charge walks away with their "half"then you keep testing the various movements. example:- TX holder calls"left"...model holder calls back "yes, left".....TX calls" right" RX returns call, "yes, right" and so-on,until you have checked all stick-movements and switches.(if the TX operator can see the movements , he's too near the model ! )
Repeat at greater distances,you will eventually lose contact. the distance of the LAST SUCCESSFUL TEST is the range-check.

When you fly, you pull the aerial out until it is fully extended. the transmitting power is increased at least tenfold, over your "range-check" .Therefore,you shold lose sight of the model,long before you lose the ability to send it a control-signal.
Of course, that situation should never arise-the radio-power is a total overkill,to ensure that a model can be SAFELY be bought down,BEFORE you lose sight of it.
hope that's clearer.

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02-14-2006 11:33 AM  12 years agoPost 16
Rui_JC

rrVeteran

Portugal

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Connect to your sim ( if you have one ) and check if all channels are working.

Then you can do a range check with your heli ( with the main motor umplugged ) or just remove main blades and tail blades and try!

If you remove the blades ( main and tail ) just hold the skids and you will be fine to test all signals and also do a range check.

.

Keep it up...literally

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02-14-2006 11:36 PM  12 years agoPost 17
Tommy Z

rrKey Veteran

Lubbock, Texas

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thanks bagobitz, that really helps, and i recently found out that there are ppl here in midland, texas that can help me. (i think i had a good idea of what a telescopic aerial was, but you threw me off w/ "folding it." thats all.
and i dont have a simulator so i cant test it that way. but thanks for the idea. ill most likely be taking off my blades. and also i have a tiny DC motor for my tail blades, no servo for rudder.
thanks again, you guys are great!
-tommy

-Tommy Boy

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