Search: Posts Made By: kyleservicetech
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05-04-2016, 09:46 PM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Yeah 6500 RPM on 24X12 prop is around 5700...

Yeah
6500 RPM on 24X12 prop is around 5700 Watts.
05-04-2016, 08:43 PM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

What RPM do you get on that 24X12 prop?

What RPM do you get on that 24X12 prop?
05-03-2016, 07:25 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

I would not do that. Our club has members...

I would not do that.

Our club has members that have lost models due to the servo arm's spline not matching the servo output shaft. The mis-matched arm/output shafts have slipped in flight,...
02-10-2016, 03:18 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

LOL That's the wattmeter I've got. Don't...

LOL

That's the wattmeter I've got. Don't think it will last very long at the 133 Amps!
02-10-2016, 03:02 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

4500 Watts!

Hi Don

I've got a Rimfire 50 cc electric motor, powered by a 12S3P A123 pack. I've measured 133 Amps at full power while spinning a 22X10 prop at 6600 RPM. Metering was with a Sears Craftsman...
02-18-2014, 06:46 PM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

That's what I thought. Taking another look...

That's what I thought.

Taking another look at the three phase "H_H_H" MosFet driver circuit, it would not be hard to turn on one set of MosFets across one motor winding. Then, turn on all bottom...
02-18-2014, 02:05 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Interesting info. Our Engineers used this...

Interesting info. Our Engineers used this technique some 15 years ago in a very high power magnetic actuator circuit design. This magnetic actuator pulled some 100 Amps at 55 Volts DC. The...
02-17-2014, 10:08 PM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Yup The interaction between the motors...

Yup
The interaction between the motors electromagnets, and the steel bell and its magnets is kinda-sorta-maybe like a transformer action. Remove part of the steel around a transformer, and you've...
02-17-2014, 08:42 PM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Yup Yup, those peak currents as described by...

Yup

Yup, those peak currents as described by Castle Creations is a big issue on running an ESC at reduced power. Add to that, along with the heating effect from the actual resistance of the...
02-17-2014, 07:01 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Yeah, we did all of that. We did quite a bit of...

Yeah, we did all of that. We did quite a bit of preflight testing.

The pilot decided to fly anyhow, with reduced maximum throttle on the model. Per the CC ESC data printout, at the two minute...
02-17-2014, 03:55 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Dang. Last year, I helped a club member with...

Dang.

Last year, I helped a club member with a electric turbine twin that was pulling 175 Amps each on a pair of 6S 5000 LiPos. That's 7300 Watts. Don't have any proof of it though, the model...
09-18-2013, 12:13 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Check out those $$$$ Hacker A60 series motors. ...

Check out those $$$$ Hacker A60 series motors. I've got over 200 flawless flights on my A60-16M, and about 75 flights on my A60-5S. The A60-16M has hit 3000 watts, and on landing is finger touch...
04-25-2011, 03:16 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Hi Don Thanks! This power system is...

Hi Don
Thanks!

This power system is sure a far cry from those motors I was rewinding back in the early 1980's where it was a good day to have a flight without melting all the solder off the...
04-25-2011, 03:14 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Thanks Chellie! Have a good what's left of...

Thanks Chellie!

Have a good what's left of Easter, and the next week. Hope you get better weather than around here. It's been raining or been to windy every day for the past 10 days around...
04-25-2011, 02:21 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Thanks Chellie FYI, those five flights took...

Thanks Chellie
FYI, those five flights took about 30% of the ampere hours that my two parallel connected 120 Ampere Hour deep cycle batteries have.

Guess that really places a limit on how big...
04-24-2011, 11:02 PM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Hi Chellie Just got my Hacker A60-16M motor,...

Hi Chellie
Just got my Hacker A60-16M motor, 19X12 APC-E prop, 12S2P A123 batteries past 3000 watts today. (Temperature was above 50 degrees, and the A123 battery pack is improving with a total of...
04-06-2011, 05:04 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Hi Chellie Any danged fool can see the model...

Hi Chellie
Any danged fool can see the model plane is better looking! :cool:

At least now the snow is gone, and flying is getting going around here.

First of February, two months after...
04-06-2011, 04:56 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Just put the first three flights today on my...

Just put the first three flights today on my Hacker A60-16M motor with 19x12 APC-E prop, 12S2P A123 cells, Extra 330 model with 78 inch wing, 1200 square inches, weight 17 pounds. The attached...
01-21-2011, 01:35 AM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Very nice! But, did your Hacker survive? (I've...

Very nice! But, did your Hacker survive? (I've got a Hacker A60-16M, waiting for the snow to go away.)
08-09-2009, 10:29 PM
Replies: 332
Sticky KW club
Views: 165,044
Posted By kyleservicetech

Kilowatt Club

I just ran up my Great Planes Revolver with a Hacker A40-10L and 6S2P A123 packs. Per attached its running 1115 watts.

Also have two others that are running at, or just a few watts below one...
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