jet ranger (concept) esc

[heliwoodster]

Have this kyosho concept 500 size ep it has a K-speed brushed motor in it no idea what KV it is ,so i have no idea which speed controller to get (amps)can anyone help ?.

http://i235.photobucket.com/albums/ee294/heliiwoodster/DSCF1526.jpg

http://i235.photobucket.com/albums/ee294/heliiwoodster/DSCF1522.jpg




cheers,Gary

[Wyldman]

I did a Google search for Kyosho K-Speed and found a few hits to indicate that it might be a brushed motor. I'll continue to look, but that's it so far.

How old is this beast?

Is this the motor you have?

http://www.southeastrc.com/Items/StdItemView.aspx?lookup=KYO70875&tc=REP

[heliwoodster]

New fella at the club had it in his loft for 15-16 years new in the box,its a brushed motor ive googled it cant find anything.
yes thats the motor on it.

thanks for helping me cheers
Gary

[heliwoodster]

had another google and found this any ideas

http://liaison.ms.u-tokyo.ac.jp/agusta/history.html

K speed heli
(540-class) - is this the motor kv
15.7:1.4.56

[Wyldman]

540 class brushed motors are still used extensively in RC cars. Novak & Castle Creations make a range of programmable speed controls for use with them that can be used with either NiCd/NiMh or LiPo batteries. Here are some examples:

http://www.teamnovak.com/products/esc/gtb/index.html

http://www.castlecreations.com/products/mamba_max.html

According to the chart you found, it was set up to use an 8.4V 1000-1700mah battery (7 cell NiMh from the looks of it, 7 x 1.2v = 8.4v). The mah rating of NiMh batteries has improved considerably since then. My E-Revo uses the same type of battery rated at 4600mah for the same size/weight for example, which should considerably improve flight time.

One downside though, being a brushed motor, you will have to keep a very close eye on the brushes, as when they wear down, power will diminish quickly, possibly catastrophicly. Keeping sets of brushes on hand & being willing to tear down the motor for a rebuild can be a little daunting.

You might consider going brushless by using Castle Creations Mamba Max motor and speed controller combo. The motor would be a direct bolt up, no adapters needed. I did this in a Tamiya TL-01 car chassis, which was a 540 class brushed motor originally, and it made for an extremely strong and long running combo utilizing 2s or 3s LiPo's. If you choose to do this though, you will want to program out the reverse/brake functions in the ESC to prevent accidental rotor stoppage. It's very hard to autorotate with 0 headspeed!

I never really thought that my RC car experiences would be of any value on a Heli site, but I guess you never know. Let me kow if you have any other ?'s, I'll try to help if I can.

These are my thoughts and opinions, others may disagree or have other ideas & that's fine, I relate my experiences here that have proven to work for me in the past.

In other words: your mileage may vary!