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| Electric Jets Discuss electric jets in Canada. |
Topic Review (Newest First)
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| 07-03-2015 09:17 PM | ||
| jsparky |
Re: new to edf Quote:
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| 07-03-2015 09:02 PM | ||
| 4stripes |
Re: new to edf Congratulations Jeff! Great day for a maiden flight too! |
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| 07-03-2015 08:40 PM | ||
| jsparky |
Re: new to edf The Habu did her maiden today in burlington.. first flight was about 2 minutes of pure terror.. then once trimmed out... the second flight was great.. landings not so good.. but on the second flight she could cruise at half throttle with ease.. |
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| 01-10-2015 04:00 PM | ||
| 4stripes |
Re: new to edf Glad you got things sorted out. Obstructions to the intake can have a large effect as you have found out. We were losing 1/3 of available thrust in our HTG Mig15 when the ESC was mounted too close to the EDF shroud, disturbing the airflow. We gained 1kg thrust by simply moving it farther forward from its original position! |
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| 01-10-2015 12:24 PM | ||
| airbourne |
Re: new to edf Quote:
As far as the thrust, I think that's around what you get with the stock E-flite fan and motor so it should fly fine, I believe stock speed is ~85mph at full throttle. |
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| 01-10-2015 10:14 AM | ||
| RickyBoy |
Re: new to edf Very nice, mine hit 115mph with a TamJets EDF on 6s |
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| 01-10-2015 10:00 AM | ||
| jsparky |
Re: new to edf Well we did one last kick at the cat.. tore through the airframe inside and cleaned up a bunch of things.. found foam that was sticking out into the airflow a little so trimmed it back on a taper to smooth out the air flow.. re-arranged the wiring again to move it more out of the way.. moved the fan housing back about 1/2 an inch to tuck it in tighter to the thrust tube area.. and move it back away from where the ESC is located in front of the fan.. On a fresh charged battery it hit a maximum of 42oz of thrust and then settled back to 40oz  This is the best thrust I have seen in the air frame so far.. as good as the testing in my test stand.. so no loss of thrust from test stand to air frame.. matter of fact it improved slightly from 39 in the test stand to 40 in the airframe The extra work to clean things up inside paid off. So this is my habu.. hopefully ready to fly.. |
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| 01-04-2015 07:11 PM | ||
| jsparky |
Re: new to edf Ok... well found part of the problem.. just tore through the plane again.. cleaned up a few things.. rechecked.. and then for some reason.. I started looking at the scales.. So if anyone ever see's a U-tube vid like I did with someone mounting the scales on the side... DON'T BELIEVE IT !!!!! They are not accurate.. but then again.. they where never expected to work on their side.. DUH !!!! |
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| 01-04-2015 05:15 PM | ||
| NDW |
Re: new to edf heading to the shop in a few minutes.... wish me luck. lots of great information and tips... Thank to all D. |
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| 01-04-2015 04:40 PM | ||
| jsparky |
Re: new to edf Here is a pic of my balance in action.. tried a few more setups.. and no matter what I changed.. the thrust did not improve.. in most cases it got worse. tried a 3400 kv with a 4 blade.. 25oz 10 blade 15oz suggest prop stall yet 5 blade gives 32oz of thrust.. the data would suggest prop stall.. but going to a 4 blade vers 5 blade on the same motor with the same amps and watts did worse.. The data and test have been inconclusive  It would seem that for this airframe.. the best thrust that can be gotten is with a 3400kv motor with a 5 blade fan.. at 32oz of thrust... and just in case you are wondering.. but NO the points are not both touching the magnets.. there is about a 1/32 gap at the one end.. I found that if you let the heavy end holding the fan is touching the magnet.. the balancer is more sensitive.. seems to be more drag if you let it touch at the light end.. just my observations while testing.. jeff |
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