Best EDF for Hoffman "Wild Beast"
05-30-2009, 01:32 PM
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Best EDF for Hoffman "Wild Beast"
I have the Hoffman "Wild Beast" motor and need to find A reasonably priced EDF that won't disintegrate at full power.
Thanks
Thanks
06-02-2009, 11:01 AM
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RE: Best EDF for Hoffman
Kevin ... I doubt a 4S 2,200 pack will last ... she pulls a lot of amps on 4S from what I read in RCGroups.
1RC ... how about the Super Sniper? She is suppose to be a fast plane too. The SAPACcomposite Hawk is another decently fast pane and she is reasonably priced
1RC ... how about the Super Sniper? She is suppose to be a fast plane too. The SAPACcomposite Hawk is another decently fast pane and she is reasonably priced
06-02-2009, 03:46 PM
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RE: Best EDF for Hoffman
Hoffman Magnetics products are designed and assembled in Chatsworth, California USA. KV: 4880
Weight: 130g
No. of cells(Lipo): 3-4s
DESC6: 1700watts
Weight: 130g
No. of cells(Lipo): 3-4s
DESC6: 1700watts
Price: $166.20
At 1700 watts and 4S the current draw will be ~115 amps.
A 2200 mAHr pack just won't do, unless you want 1 minute flights and then only if your pack is rated at 46C.
Choose a different motor, such as an HET3W and couple it to a WEMOMF480. The current draw will be 30 amps, an inexpensive 36 amp Tsunami will suffice.
At 30 amps, your 2200 mAHr pack, assuming a 20C type, will power your plane for 5 minutes.
As good as the HWB motor may be, it isn't what you need
At 1700 watts and 4S the current draw will be ~115 amps.
A 2200 mAHr pack just won't do, unless you want 1 minute flights and then only if your pack is rated at 46C.
Choose a different motor, such as an HET3W and couple it to a WEMOMF480. The current draw will be 30 amps, an inexpensive 36 amp Tsunami will suffice.
At 30 amps, your 2200 mAHr pack, assuming a 20C type, will power your plane for 5 minutes.
As good as the HWB motor may be, it isn't what you need
06-02-2009, 11:27 PM
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RE: Best EDF for Hoffman
Larry ... 4880KVand it can handle 4S. This motor is nuts, we usually do not exceed 3,400 KVon 4S for most motors. This is a real BEAST!
06-03-2009, 01:34 AM
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RE: Best EDF for Hoffman
Thanks Larry for your advice.
If this motor is made for 70mm fan units what battery and ESC would be needed for properrunning.
Thanks
Kevin
If this motor is made for 70mm fan units what battery and ESC would be needed for properrunning.
Thanks
Kevin
06-03-2009, 02:04 AM
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RE: Best EDF for Hoffman
Kev ... I like the HET2W-20 for a 4S set up in a 70mm fan. I use the HET6904 fan unit with the HET 2W-20 motor and she pulls about 50+A on full throttle. The 480 fan is the same I guess. So try to run 4S 2,500 mAh packs with a 60A ESC.
06-03-2009, 06:33 AM
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RE: Best EDF for Hoffman
tIANci,
I am not debating the merits of the HWB motor. It may be a "real beast" but one would need some very large capacity (read that as heavy) 4S packs to develop 1700 W for anything other than very short bursts.
The HWB might be a good candidate for an all out attempt at a 70 mm world speed record but unless it can develop reasonable thrust at low throttle settings there are a couple of other 70 mm EDF/motor combos better suited for the average sport flier.
I am not debating the merits of the HWB motor. It may be a "real beast" but one would need some very large capacity (read that as heavy) 4S packs to develop 1700 W for anything other than very short bursts.
The HWB might be a good candidate for an all out attempt at a 70 mm world speed record but unless it can develop reasonable thrust at low throttle settings there are a couple of other 70 mm EDF/motor combos better suited for the average sport flier.
06-03-2009, 10:41 AM
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RE: Best EDF for Hoffman
Larry I know what you mean, the amp draw is just way too high for most batteries and even with 30C packs you need the pack to be about 3,700 mAh if you want to push hard. With that most 70mm EDFplanes will be running heavy. I saw the stats and I was like, WOW ... Let's get one ... then when you realise what sort of batts are needed, I told myself to forget it. I am not all too keen to fly planes with high wing loadings. But it sure sounds like a BEAST!
