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I'll see if it survives the bench test first but I'll try a Hobby King 2800kv motor with only a few flights on it (out of my F-4 that I kept crash landing), off 4S 30c packs.
I have a E-flite power meter and programming card for the Turnigy speed controller. If it ends up running a little hot I'll change the timing of the ESC to keep it in one piece. Going to try to keep it at/under 60amps. The ESC is a 60amp with 80 amp burst. Not my dream set-up, but should do until eventually get something better. If the plane sounds better/quieter I'll be happy. If I gain a few knots of airspeed I'll be even happier! The motor actually really hauled ass in the F-4, way faster than the F-18 but that probably has more to do with the airframe differences. I metered both planes and they pulled around the same numbers, the F-18 is bigger, draggier, especially with ordinance under the wings. The CS10 fan from what I understand is going to pull more amps and watts under load so I may have reduce the ESC timing to a safe parameter. Shall see. The difference between high and medium timing with the CS10 fan I bet will be about 100watts or close to it. Will definitely drop the amps down if i have to do it. Right now the ESC is programmed balls to the wall which was great for the HK 6 blade rotor. |
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Quote:
I see you are running 2s in series, that should give you an advantage CGing the plane being able to transfer battery weight independently. Pretty slick. Maybe try adding a 3rd battery to the mix with that motor...
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United States, TX, Grand Prairie
Joined Nov 2005
4,988 Posts
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Quote:
I bench tested a CP 480 2500 with a CP motor with a 65c pack and got over 6lbs of thrust with it at 109 amps..that's way too much power through the windings of that motor and I suspect the same for the 2100kv HK motors too....looks like if we stay below 3000watts of constant power on the pack the motors are good. I've decided to use my 65c packs on bigger motors, the smaller motors that are already peaked don't like them at all. I have two 2100 kv motors I'm going to put to work on an airliner on 6s... |
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Joined Apr 2009
80 Posts
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Does anyone have a link to instructions for programming the stock ESC? I bought a CS fan and turnegy 28-55 2800kv motor to try. Initially it appears to have about the same power as the stock setup. I want to try setting the timing to high and see what happens.
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United States, TX, Grand Prairie
Joined Nov 2005
4,988 Posts
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Others have tested the motor and ran it on 6s in the 70mm cs10 thread.
Look for 2100kv and you'll find the post on it. Someone tested the motor with a pack that put out more than 3kw constant and the motor burnt so stay below 40c and you're ok. Really there's no good way to tell if these combos work unless they're bench tested...I really like it when I can see bench numbers on video too |
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The only way to know for sure I guess is the ole' bench test with a watt meter, but I imagine CS10 and 2800kv on 4S will cook the exceed ESC. I'm going to try a Turnigy plush 60amp ESC, if it's over taxed I`ll grab a 80 amp one eventially. For a few bucks they come with a programming card that is super easy to change the settings without fiddling with transmitter, from ESC timing to what kind of song the airplane starts up with when you plug in the battery lol |
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Here is a link to the known test results...
http://www.rcgroups.com/forums/showthread.php?t=1601868 I think Ispintechno is right about your esc... Turnigy L2855 – 2800KV 4S 4000 40C Vm 14.36 Ap 63.47 Wp 950.0 Thrust(Kg) 1.6 g/w: 1.67 |
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