Technical Links - Page 2 - RC Groups
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 Nov 11, 2005, 05:39 AM Suspended Account thanks jim.
 Nov 11, 2005, 12:43 PM Registered User If it helps I fly that blue foamie of mine with a Park 370 5400kv motor, 10x8 prop, GWS "D" gearing with a 2S pack. At wot it justs barely goes verticle. Plane weighs 9.6oz without the 2S battery. If I recall correctly it draws around 10 - 11amps static at wot. Motor is a little warm to the touch. I put a 3S 2100 pack on ot once and it went ballistic. Motor was pretty hot. Dick
Nov 12, 2005, 02:51 PM
Mayor of Simpleton
Quote:
 Originally Posted by jmullane I put the 370 4100 Kv in MotoCalc with a 9 x 6 prop and a 3s 1320 Lipo: Batt Amps = 25.7 Motor Amps = 25.7 Motor Volts = 9.3 Input (W) = 239.7 Loss (W) = 206.3 MGbOut (W) = 33.5 MotGb Ef(%) = 14.0 Shaft Ef(%) = 11.7 Prop RPM = 5553 Thrust (oz) = 9.6 PSpd (mph) = 31.6 Prop Ef(%) = 0.0 Total Ef(%) = 0.0 Time (m:s) = 3:05 With a 12 x 6 prop..... Batt Amps = 24.7 Motor Amps = 24.7 Motor Volts = 9.4 Input (W) = 232.4 Loss (W) = 214.7 MGbOut (W) = 17.7 MotGb Ef(%) = 7.6 Shaft Ef(%) = 6.5 Prop RPM = 3062 Thrust (oz) = 9.3 PSpd (mph) = 17.4 Prop Ef(%) = 0.0 Total Ef(%) = 0.0 Time (m:s) = 3:12
Those numbers seem odd. Did you include a gearbox in that??
 Nov 12, 2005, 04:34 PM Suspended Account went to hobby town and traded in the park 400 (can) for the 370 out runner. we'll see if it works.
Nov 12, 2005, 10:07 PM
Something Clever
Tommy,

I attached a picture of the MotoCalc screen. This is how I received the numbers listed above.

Jim

### Images

 Nov 12, 2005, 11:31 PM Indoor Free Flight Modeler you need to add a gearbox , the way you have it set up is as a direct drive, that is why the amps are so high.
 Nov 13, 2005, 02:50 AM Suspended Account so what are you saying, don? this is the wrong motor for this plane (E-flite Park 370 Outrunner 1360kv)? the plan calls for either a GWS EPS100-A or EPS300C-C and the AUW is around 12oz. i plan on using a 2S lipo too.
 Nov 13, 2005, 06:21 AM Something Clever MotoCalc with a Park 370 Outrunner 1360Kv / 9 x 6 Prop Direct Drive/ 2s Lipo Batt Amps = 13.4 Motor Amps = 13.4 Motor Volts = 6.8 Input (W) = 90.5 Loss (W) = 28.5 MGbOut (W) = 62.0 MotGb Ef(%) = 68.5 Shaft Ef(%) = 62.7 Prop RPM = 6821 Thrust (oz) = 14.5 PSpd (mph) = 38.8
 Nov 13, 2005, 09:13 AM Suspended Account thanks again jim. those numbers look good.
Nov 13, 2005, 09:49 AM
Indoor Free Flight Modeler
Quote:
 Originally Posted by sgtdirt so what are you saying, don? this is the wrong motor for this plane (E-flite Park 370 Outrunner 1360kv)?
I am saying the motocalc simulation shown used a Park 370 inrunner with a KV of 4100 running a 9x6 direct drive prop. So you would need a gearbox added to it to lower the amps. Or the simulation changed from and inrunner to an outrunner , but then the KV would have to change from 4100 to 1360.
 Dec 02, 2005, 12:22 AM Suspended Account besides don, who has done a Xtal exchange with radicalrc?
 Dec 26, 2005, 01:15 AM Suspended Account has anyone ever used the Dean's 3 pin for the ESC to motor connection. i'm thinking about using these for a CDrom with a CC TB9 on a 2S lipo. i have bullet connectors on the motor now and this may be a weight issue. got it done. yes it works. nice and light too. although it was running the wrong direction, i hooked it up to the PHX-link and made the change. running good now!! Last edited by sgtdirt; Dec 26, 2005 at 10:00 PM.
 Dec 28, 2005, 01:44 PM Mayor of Simpleton Hey Jack, I just got some of these from Parma Hobby. http://www.astroflight.com/e/env/000...roducts:af-520 There non-polarized. Tommy
 Dec 28, 2005, 05:30 PM Registered User I got some of those Deans micros for the ESC-Motor connection. They work well but you have to patient when soldering them.
 Dec 28, 2005, 06:52 PM Suspended Account thanks tommy. those would probably work since i am only (hopefully) going to draw less than 5 amps.