rob
Instructor
Posts: 207
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Post by rob on Jun 6, 2015 12:01:11 GMT -4
I ran some tests on the 70mm EDFs I have lying around the house (turns out I had far too many squirrelled away) as I'm going to need one for a new plane. I kind of suspected, and the tests have confirmed, that the more blades in an EDF the lower the efficiency (using the same motor, esc, and battery). This mirrors what happens when you add blades to a standard propeller set up and why most of us use two blade props. The Lander blew away the competition as far as thrust per watts, very nice fans, Hobby King also sells them as Alloy DPS (arrived in Lander packaging). I would also like to test an Eflite or HET 70mm set up. If someone has one they would like tested just drop it off and I'll update the list. Not saying my tests are absolutely accurate but as I use the same test bench, batteries, esc, is will be a fair comparison of EDF systems. Attachments:EDF Testing.pdf (32.46 KB)
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Post by gregh on Jun 6, 2015 15:23:21 GMT -4
Got your email rob. Thanks for doing this! It'll def make my fan choice easier.
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rob
Instructor
Posts: 207
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Post by rob on Jun 9, 2015 10:31:05 GMT -4
I'll have to update the table for the 10 blade Change Sun for the run we did last night. 1.65kg Static Thrust and 1250 Watts on the 6S 2650mAH battery. The other 6S battery I tested with must have a higher internal resistance.
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Post by gregh on Jun 9, 2015 11:16:16 GMT -4
yep, and now it's going in my new F18. Thanks a bunch rob!
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rob
Instructor
Posts: 207
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Post by rob on Jun 9, 2015 18:12:52 GMT -4
No problem, hopefully we'll get some good weather and get to see it fly.
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Post by gregh on Jun 9, 2015 18:32:30 GMT -4
yah...good weather lol
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