Wednesday, May 17, 2006

[Heli] Hirobo Lama

Lama is a cute tiny electrical helicopter with coaxial main rotors . Our lab bought it for some experimeantal purpose but fail due to its poor payload carrying capability.

It have not been flew for a long time. I took it out and charged the batteries, then flew it. It is really very stable and tough.

You can hover it and do some adjustment, then free your hands from the transmitter for several seconds with Lama "auto hovering" by itself.

Although one of its balde was bent in a minor crash, it still fly well!! Lama is really easy and strong for the beginners.

Wednesday, May 10, 2006

[Heli] T-rex try again

I reinstalled the original landing skid on the T-rex and flew it again just about 1 hour ago.

It seems something wrong with the power set. T-rex cannot hold its power for a long enough period. It always suffer from power loss. I think maybe the speed controller didn't be set properly.

I have to consult someone experienced, maybe Po-hu, maybe Beng-ka R/C model shop...

Tuesday, May 09, 2006

[Heli] Raptor 30 with CCD camera tracking

Several months ago, my junior Scott plan to use small electric helicopter (T-rex) to carry his CCD camera for tracking experience. After several tests, we still cannot reduce all the hardware's weight to as light as T-rex can lift up.

In fact, we once thought that my skill is not good enough to handle the T-rex with heavy payload. After Po-hu's flight test, however, we realized that the hardware is too heavy for our poor T-rex. Even we change the battery and speed controller, the T-rex still have a "power drop" after its take-off. I believe it was due to the over weighted payload. The weight induced over current and then triggered the speed controller's protection mechanism to reduce the battery's electric output.

So we decided to change the platform, from T-rex to the Raptor-30. The Raptor-30 is an old helicopter from Po-fu. Scott installed his CCD camera and other hardware on this old Raptor, and I flew it this afternoon. Altough my skill is not good, the Raptor still complete its work, and Scott obtained the experimental results he wants! :-)

Here is the photo of the transmitter, FF-7, also from Po-fu. It is the oldest one I have used so far.

After the flight today, I think my hovering skill have to be improved... :-p

Monday, May 08, 2006

[Talk] Keep hovering

Oh, I have not written my experiments for a long time... In fact, I have flown several RC helicopters, but I didn't write down that because of my laziness.

I will be back... :-p