Electric Training If you are new to electric learn more about them here or ask questions.

am I over-propping this setup?

Reply

Old 01-04-2004, 03:21 PM
  #1  
shams42
Member
Thread Starter
My Feedback: (1)
 
shams42's Avatar
 
Join Date: Nov 2003
Location: Athens, GA
Posts: 94
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default am I over-propping this setup?

Dandy sport with GWS 350C-C motor and gearbox, 7.4v 1500 mah Li-Poly battery, spinning a 10x8 prop.

What do you think?
shams42 is offline  
Reply With Quote
Old 01-05-2004, 08:07 AM
  #2  
Matt Kirsch
My Feedback: (21)
 
Matt Kirsch's Avatar
 
Join Date: Jul 2002
Location: Spencerport, NY
Posts: 7,349
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: am I over-propping this setup?

It might be a little much:

http://www.gws.com.tw/english/produc...em/eps350c.htm
Matt Kirsch is offline  
Reply With Quote
Old 01-06-2004, 08:36 PM
  #3  
Dr Kiwi
Senior Member
 
Join Date: Dec 2002
Location: Chattanooga, TN
Posts: 2,198
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: am I over-propping this setup?

As Matt says - it is just off their charts, but why not put a Whattmeter on it and see what the current draw really is - if it is less than 8A you are probably okay [that would be ~50-55W-in which should be fine for a 350C motor].

Cheers, Phil
Dr Kiwi is offline  
Reply With Quote
Old 01-06-2004, 11:58 PM
  #4  
shams42
Member
Thread Starter
My Feedback: (1)
 
shams42's Avatar
 
Join Date: Nov 2003
Location: Athens, GA
Posts: 94
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: am I over-propping this setup?

Hmm, I wish I had a whattmeter. My VOM doesn't measure amps, either, or I'd test it that way. I picked up a selection of props today at the LHS. Unfortunately, the only one that will fit without an adapter is a 10x4.7. I think it will work though. Motorcalc predicts that this prop will draw 8.2 amps peak (56.1 W) and produce 13.9 oz of thrust. My Dandy weighs about 12 oz., and this combo will let it climb vertically. I tested it tonight in my bedroom... it'll climb right out of your hand if you let it.

I'll probably also use a 9x4.7 prop to get the amps down to about 6.5 and increase the run time. I'll still have 10.7 oz of thrust to play with.

Thanks,
Matt
shams42 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