<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2900.2802" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>I have a problem with an electric conversion which
while not precisely pattern related, I'm sure will be applicable to electric
pattern problems...so I'll ask it here.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I am trying to convert a Showtime from YS 110 4
cycle power to electric power. After looking around the web, I got an
Actro 32-3 - which is a popular motor for the Ion electric helicopter. I
know that this motor runs well with available ESC's on 5S4P lithium packs, so I
set it up with a 17X12 APC e prop and a 77amp ESC from Hobby Lobby ( esc
and prop recommended on their website). To make a long story
short, the ESC litterally burned up 30 seconds into the first flight....but BOY
WHAT POWER for that 30 seconds<G>!!!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>OK, so I'm thinking that burning up probably
indicates a problem.....and I start to investigate...I hook up a watts-up to my
Focus II with a Plettenberg 30-10 and a 21X12 APC and it pulls about 65
amps at full throttle on the bench....Then I set up the Showtime and it tops 75
amps at half throttle!! HMMM, so there is the problem....Now I try to make
changes to decrease the amperage -- larger prop and smaller prop---no major
change, then I tried just using a 5 cell pack cutting voltage in half...still
about the same....so the question is: How do you adjust the current drawn
by an electric motor? Can this set up be salvaged...Where did I go wrong
and how can I avoid this in the future? </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>TIA for your help and the benefit of your
experience!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>George</FONT></DIV></BODY></HTML>