Which Brushless Motor for F15?
08-11-2005, 05:25 AM
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Which Brushless Motor for F15?
Ive just built a 3DFoamy F15 and the one in the video which seems to fly OK uses an AXI 2208-34 which is described as follows...
"Suitable for slow and park fly size models up to 500g No of cells 6-10, 3 x Li-Poly - RPM/Volt 1140 - Current Capacity 8A/60s - Dimensions 27.5 x 26mm - Shaft Di. 3.17mm - Weight 45g"
...now my model weighs 600g (everything except motor) which is more than the 500g suggested for the AXI.
I started looking for alternative motors and came across this one...
"Air Power Brushless Outrunner Motor - 300DF Motor
This motor is a 26 g. muscle motor. Drawing between 7 and 8 Amps continuous, it runs on 2 or 3 lithium polymer cells, and gives 400 grams of thrust, turning a 5 x 3 prop at 21,000. With a 6 x 3 prop or 320 g. of thrust at 13,500 rpm. The motor has a diameter of 25.75 mm., a length of 30.5 mm. (including shaft) and a shaft diameter of 2.3 mm. A prop adapter for 2.3 mm shafts is recommended. With 8:1 gearing (GWS SPEED 300-D box) and a 9!QUOT! x 5!QUOT! prop, this unit is capable of providing 625 g. of static thrust. The drive is adaptable to small ducted fan applications, such as the GWS EDF55. Some enlargement of the motor housing would be required."
...Now this is lighter and cheaper than the AXI, and if I use the gearing I should get a 1:1 power to weight ratio?
Am I misunderstanding something?
What motor (and controller) should I buy?
Does anyone know what thrust the AXI would give out - presumably its less than 500g since you don't need a 1:1 to fly an aircraft?
Thanks
David Bevan
http://www.davidbevan.co.uk
"Suitable for slow and park fly size models up to 500g No of cells 6-10, 3 x Li-Poly - RPM/Volt 1140 - Current Capacity 8A/60s - Dimensions 27.5 x 26mm - Shaft Di. 3.17mm - Weight 45g"
...now my model weighs 600g (everything except motor) which is more than the 500g suggested for the AXI.
I started looking for alternative motors and came across this one...
"Air Power Brushless Outrunner Motor - 300DF Motor
This motor is a 26 g. muscle motor. Drawing between 7 and 8 Amps continuous, it runs on 2 or 3 lithium polymer cells, and gives 400 grams of thrust, turning a 5 x 3 prop at 21,000. With a 6 x 3 prop or 320 g. of thrust at 13,500 rpm. The motor has a diameter of 25.75 mm., a length of 30.5 mm. (including shaft) and a shaft diameter of 2.3 mm. A prop adapter for 2.3 mm shafts is recommended. With 8:1 gearing (GWS SPEED 300-D box) and a 9!QUOT! x 5!QUOT! prop, this unit is capable of providing 625 g. of static thrust. The drive is adaptable to small ducted fan applications, such as the GWS EDF55. Some enlargement of the motor housing would be required."
...Now this is lighter and cheaper than the AXI, and if I use the gearing I should get a 1:1 power to weight ratio?
Am I misunderstanding something?
What motor (and controller) should I buy?
Does anyone know what thrust the AXI would give out - presumably its less than 500g since you don't need a 1:1 to fly an aircraft?
Thanks
David Bevan
http://www.davidbevan.co.uk
09-01-2005, 05:11 AM
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RE: Which Brushless Motor for F15?
I'm assuming your running a 3s lipo?If not you should in these.OK,mine was built from the plans and the setup is
Axi 2212/26
3s 11.1 lipo 1800mah
Apc slofly 9x7.5
AUW 590g
It goes pretty well and draws about 12 amps and has a tad over 1 to 1 static thrust.The 2208/34 that is on the one in the video is pushed past its limits although it has been holding up with a 9x6.That one by the way only weighed about 470g!!
Other successful combos have been
Himax 2015-4100 4.4 geared with 9x6 or 9x7.5 which is really pushing this combo
Himax 2025-4200 as above gearing and props
I know of one with a Hacker A20 which really hauls
Axi 2212/20 8x6
try www.eflypower.com for the Axi or Himax motors and I have one of the JB 20amp controllers which I,m happy with.
Cheers Graeme
Axi 2212/26
3s 11.1 lipo 1800mah
Apc slofly 9x7.5
AUW 590g
It goes pretty well and draws about 12 amps and has a tad over 1 to 1 static thrust.The 2208/34 that is on the one in the video is pushed past its limits although it has been holding up with a 9x6.That one by the way only weighed about 470g!!
Other successful combos have been
Himax 2015-4100 4.4 geared with 9x6 or 9x7.5 which is really pushing this combo
Himax 2025-4200 as above gearing and props
I know of one with a Hacker A20 which really hauls
Axi 2212/20 8x6
try www.eflypower.com for the Axi or Himax motors and I have one of the JB 20amp controllers which I,m happy with.
Cheers Graeme
