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- From: jmoonan@ccv1.bbn.com (John Moonan)
- Newsgroups: rec.models.rc
- Subject: Electric Power Recomendations
- Message-ID: <JMOONAN.93Jan26094904@ccv1.bbn.com>
- Date: 26 Jan 93 14:49:04 GMT
- Organization: BBN Communications, Cambridge, MA
- Lines: 22
- NNTP-Posting-Host: ccv1.bbn.com
-
-
- I'm a long time wet power flyer but this past summer I decided to build
- an electric powered glider for a change of pace. Ended up building a
- Goldberg Electra. Power is the stock motor with a Master Airscrew 2.5X1
- gearbox and 12X8 folding prop. Battery packs are 6 cell 1400 SCR, 7 cell 1400
- SCR and 7 cell 1700 SCE. It flys great and I've had a lot of fun with it for
- the last 6 months. Has a good climb on the 6 cell pack and very good climb on
- the 7 cell packs. Now the question:
-
- The motor seems to be drawing about 25-30 amps on a fresh charge. I say
- this because it blew 20 amp fuses after about 30 seconds of run but has not
- blown a 30 amp fuse yet. Is this a reasonable current for this motor? Would
- I be better off going to a 3.0X1 gearbox or a different prop? Am still using
- the original motor (has about 40 flights on it) and wondering how much longer I
- can expect it to last. Any suggestions for replacement motor (other then
- AstroFlight which are expensive) when the time comes? Would some of the
- modified motors that the car racers use work? How many turns, etc.??
- --
-
- THANX, John Moonan
- SYSOP, 495th R/C Squadron
- Groton, MA
-