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Search: Posts Made By: mcdoong
Showing results 1 to 18 of 18
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Forum: Electric RC Helis
03-04-2004, 11:53 PM
Replies: 14
Views: 1,073
Posted By mcdoong

RE: Tired of breaking tail rotors

I have my dragonfly for about 2 months and I can hover for more than 3 minutes now. And I only break 1 tail rotor so far. I crashed a lot before. But everytime before it hit anything, I shut down the...
Forum: Electric RC Helis
02-29-2004, 01:22 PM
Replies: 16
Views: 3,159
Posted By mcdoong

RE: Help! Mixer & Speed Controller Burned

I've received the 7821 MOSFET from Digikey 2 days ago and soldered 2 on the board, one on the original position and the other on the backside as you guys description. And of course I channged to...
Forum: Electric RC Helis
02-24-2004, 01:04 AM
Replies: 74
Views: 7,460
Posted By mcdoong

RE: RE: OK, these motors just don't last - now what

I'm not pretty sure how my mixer board are burned. But here is my guess: The gap between the magnets and rotor is very small. If a larger filing fall between, it may cause the rotor stuck. A lot of...
Forum: Electric RC Helis
02-23-2004, 11:53 AM
Replies: 74
Views: 7,460
Posted By mcdoong

RE: RE: OK, these motors just don't last - now what

jerbo6iks,

That's what happened to me right before my mixer/speed controller was fried. My heli reduced the altitude suddenly twice and the direction also changed. The next thing happened was...
Forum: Electric RC Helis
02-22-2004, 01:38 AM
Replies: 16
Views: 3,159
Posted By mcdoong

RE: Help! Mixer & Speed Controller Burned

Wa wa wa, they forgot to solder it on or what? On the opposite side, I do see the space but there is nothing there.

mcdoong
Forum: Electric RC Helis
02-22-2004, 01:20 AM
Replies: 74
Views: 7,460
Posted By mcdoong

RE: OK, these motors just don't last - now what

This motor works fine for my dragonfly with stock tail motor once. According to other website, do not take off the jacket. Otherwise the tail motor can not hold the direction.

However, the...
Forum: Electric RC Helis
02-22-2004, 01:00 AM
Replies: 16
Views: 3,159
Posted By mcdoong

RE: Help! Mixer & Speed Controller Burned

Hi Super-Hornet,

Where is the third one located? Are all 3 the same type?

mcdoong
Forum: Electric RC Helis
02-21-2004, 01:50 AM
Replies: 16
Views: 3,159
Posted By mcdoong

RE: Help! Mixer & Speed Controller Burned

Thanks Steve. I tried farnell.com. But their wesite says I can not "export" to the US.

Thanks Dan. I also tried Digikey. But they don't have IRF7832 in stock. So I searched and find this NDS9936...
Forum: Electric RC Helis
02-20-2004, 01:37 AM
Replies: 16
Views: 3,159
Posted By mcdoong

Help! Mixer & Speed Controller Burned

I just burned something on the mixer & speed controller board of my feda dragonfly. :( It has 8 pins. According to previous thread, it should be MOSFET. Does anyone know the part number and where to...
Forum: Electric RC Helis
02-08-2004, 05:11 AM
Replies: 2
Views: 450
Posted By mcdoong

RE: Dragonfly not working. Help!

I am not quite sure where your heli's problem is. But I would get a red light after the flashing if I touch the control sticks on transmitter whle it is flashing. So I would guess probably there is...
Forum: Electric RC Helis
01-27-2004, 03:26 AM
Replies: 6
Views: 799
Posted By mcdoong

RE: Bad Vibrations

My DF is like that too. And my main rotor hub is not centered.
Forum: Electric RC Helis
01-19-2004, 03:59 AM
Replies: 11
Views: 1,134
Posted By mcdoong

RE: A newbie's question about swash plate?

quaker1, you are so right. Although it seems more controlable by puting some angle on flybar paddles, I just don't think it is a right way after a while. So I go back to read those articles on the...
Forum: Electric RC Helis
01-13-2004, 02:08 AM
Replies: 11
Views: 933
Posted By mcdoong

RE: converting micro electric to tethered (temporarily)

Does anyone know what's the highest voltage a typical mixer borad can sustain? 12V?

Do we need extra regulator and surge protector to prevent the damage caused by unstable voltage source? or the...
Forum: Electric RC Helis
01-13-2004, 01:34 AM
Replies: 11
Views: 1,134
Posted By mcdoong

RE: A newbie's question about swash plate?

Vince, I did read that and tried to follow it step by step. But I got these wierd problems which I can not find an answer there. That's why I come here asking for you guys help on these particular...
Forum: Electric RC Helis
01-12-2004, 03:35 AM
Replies: 11
Views: 1,134
Posted By mcdoong

RE: A newbie's question about swash plate?

Mike, thanks for the explaination about "gyroscopic precession". Everything makes more sense to me now. But as you said "the force will occure 90 degrees later", it seems only happen at very high...
Forum: Electric RC Helis
01-11-2004, 03:15 AM
Replies: 11
Views: 1,134
Posted By mcdoong

RE: A newbie's question about swash plate?

Thanks, Vince. I saw your previous post so I do follow "Radd's school of rotory flight". It is very helpful.
I don't have the confidence to take off yet. Does the heli behaves more predictable at...
Forum: Electric RC Helis
01-10-2004, 02:00 PM
Replies: 11
Views: 1,134
Posted By mcdoong

A newbie's question about swash plate?

I just got my dragonfly and start practicing it on the ground. While tilting the swash plate to the right, I notice that the heli not only wants to move to the right, but also forward. And if I tilt...
Forum: Electric RC Helis
01-01-2004, 12:15 PM
Replies: 16
Views: 1,236
Posted By mcdoong

RE: Hummingbird torque

Doesn't "spins to the right" means the tail motor is too powerful?
Showing results 1 to 18 of 18


 
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