PDA

View Full Version : SPeed 280 Replacement


simibill
11-04-2005, 05:47 PM
I am looking for a brushless direct replacement for a speed 280 motor. I'm assuming the 280 refers to a 28mm dia motor. Is this correct?

Thanks in advance.

flyranger
11-04-2005, 07:48 PM
The e-flite Park 370 inrunner is a brushless replacement for the 280 size brushed motors. Max amps is 5 (7 with heat sink installed). You can use the same gearbox with the included adapter ring (this was the inrunner model). e-flite also sells an Park 370 outrunner, but I haven't had experience with it. You will also need a brushless, sensorless ESC and probably a battery upsize.

Barfing Pumpkin
11-04-2005, 08:00 PM
I am looking for a brushless direct replacement for a speed 280 motor. I'm assuming the 280 refers to a 28mm dia motor. Is this correct?

Speed 280 motors usually measure 24mm in diameter, Speed 300 motors usually measure 24.25mm in diameter, Speed 400 motor is usully 27.6mm in diameter.

So, where does the Speed 280/300/400 designation come from? No idea!

Many of the newer B/L motors are now described by their actual dimensions, such as MPJet's AC 25/25-26, which means 25mm diameter, 25 mm long, and 26 turns, ....I think.

Eflight Park 370 is a very strong substitute for a Speed 280, a good motor, I have one, runs well in regular 280 size gearbox.


Jack

simibill
11-04-2005, 09:05 PM
Thanks,
I looked at Horizon Hobby's web site and see there are three different ratings for the Park 370 - 3600kv, 4100kv, 5400kv. More confusion. I also note the Speed 280 has a dia of 24mm while the Park 370 is 20mm, so how does it fit existing 280 gearboxes?

Barfing Pumpkin
11-04-2005, 10:25 PM
Thanks,
I looked at Horizon Hobby's web site and see there are three different ratings for the Park 370 - 3600kv, 4100kv, 5400kv. More confusion. I also note the Speed 280 has a dia of 24mm while the Park 370 is 20mm, so how does it fit existing 280 gearboxes?

There is an adapter ring supplied with the Eflite motor. It screws onto the front of the motor and serves as a "firewall ring" which then fits into the larger diameter gearbox housing. The ring is then screwed to the gearbox. I think you need to drill two small holes in the gearbox for the screws that hold the adapter ring and motor. The screws come with the adapter ring. 4100 kv is best version of motor, for gearbox up to 4:1. Use the 5400 kv when running large props like 11'" and geared down 6:1. The 5400 used alot in 3D, but they get real hot sometimes. I think 3600 kv will be too low in rpm on direct drive, with small prop. Also too low when used with a gearbox. Not sure....I use the 4100kV. Works fine in 5:1 gearbox and 9x6 prop.

Barf

flyranger
11-06-2005, 03:25 AM
I'm running the 4100 on my slow stick.