Glow to Electric Conversions Discuss glow/gas conversion to electric here.

Goldberg 120 size Monster Pitts:QUESTION

Reply

Old 11-11-2015, 02:17 PM
  #1  
bufordbob
Member
Thread Starter
 
Join Date: Jul 2007
Location: Goodyear, AZ
Posts: 47
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default Goldberg 120 size Monster Pitts:QUESTION

Need some help electrifying this bird,ideas about motorsize ,prop,batteries any and all comments appreciated.
Thanks
Bob
bufordbob is offline  
Reply With Quote
Old 11-11-2015, 07:54 PM
  #2  
blvdbuzzard
 
Join Date: Jun 2002
Location: high deserts, CA
Posts: 3,701
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Here is a setup. Eclac says it should put out about 21 pounds of thrust. I have an older Pitts I bought from Hobby People about this size and this is what I was thinking of putting in it.



Motor
http://www.hobbypartz.com/96m608-big...335-245kv.html

ESC
http://www.hobbypartz.com/07e-flyfun-100a-hv.html

Batteries
(2) 5s for a 10s setup

http://www.valuehobby.com/power-syst...0mah-5s-t.html


Dual battery connector.

http://www.valuehobby.com/accessorie...er-series.html



I used the calc program with a APC 18x10 Electric prop.

http://ecalc.ch/motorcalc.php


Motor @ Maximum
Current: 70.88 A
Voltage: 35.83 V
Revolutions*: 7934 rpm
electric Power: 2539.7 W
mech. Power: 2271.2 W
Efficiency: 89.4 %
est. Temperature: 56 C
133 F


Propeller
Static Thrust: 9877 g
348.4 oz
Revolutions*: 7934 rpm
Stall Thrust: 6888 g
243 oz
Thrust @ 0 km/h: 9877 g
Thrust @ 0 mph: 348.4 oz
Pitch Speed: 121 km/h
75 mph
Tip Speed: 684 km/h
425 mph



Hope it helps. You will of course need to get a watt meter so you don't let the magic smoke out. Also, on the bench, take the prop off or unplug the motor wire when ever the batteries or plugged it. That is a chop saw just waiting for an arm to eat.


Buzz.
blvdbuzzard is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service