HobbyKing.com New Products Flash Sale
Thread Tools
Old Apr 07, 2014, 07:09 AM
So I'M meant to be in control?
Colonel Blink's Avatar
Ilkley, West Yorkshire, UK
Joined Nov 2008
3,279 Posts
Originally Posted by Sundancer View Post
You've probably had this battery a while, as these days most tend to be 25C, 30C or better....
Or he's a cheapskate, like me........
Colonel Blink is online now Find More Posts by Colonel Blink
Reply With Quote
Sign up now
to remove ads between posts
Old Apr 07, 2014, 10:58 AM
Registered User
owlsabie's Avatar
South Africa
Joined Feb 2009
2,622 Posts
Originally Posted by Sundancer View Post
Brian, the "20C" refers to the maximum current which the battery can be expected to supply - 20 times the capacity, which in this case is 20 x 0.8 amps or 16 amps. This is a maximum, and it is highly likely that if pushed to this maximum the voltage (and hence the power i.e. input watts - watts = amps x volts) will be forced down. You've probably had this battery a while, as these days most tend to be 25C, 30C or better. As to the prop size, reducing this will result in a lower current, which the battery will cope with better, but, of course, less watts so less power. However, a 9 x 6 will probably run at the amps as a 10 x 5. I would suggest that a 1300 25 or 30C 3S pack would do if you can squeeze it in. Should give you around 5 minutes of flight time if propped for around 15 amps. Bigger capacity batteries perform better pro-rata.
And the light bulb goes on! I've got a sort a maintenance schedule for my older planes- I check that the wheels still run freely and can't come off, that the U/C is properly attached and control horns are still solidly attached. And, if the battery is more than 3 years old and has more than 50 flights since I started keeping records, I replace it. Its startling how much more fun a tired plane with a 4 year old 10C 1050 mah pack with 100 flights becomes with a new 1300 25C pack. I thought it was just because it was newer, but now I understand!

You may find that a new bigger higher C pack is actually not much physically bigger than your older 800? They seem to get smaller and cheaper

owlsabie is offline Find More Posts by owlsabie
Reply With Quote

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Ben Shereshaw's Eaglet - Complete-A-Project Build-Off 2014 cpmcgraw Vintage & Old-Timer Designs 335 Mar 28, 2014 01:22 AM
Build Log Fred Tuxworth Sportster Enlarged- BIPLANE Plus Build Off July-Dec 2013 Ptilou Vintage & Old-Timer Designs 49 Feb 28, 2014 09:29 PM
Build Log VIDEO MAIDEN VicSmeed Poppet BIPLANE Plus Build Off July-Dec 2013 colibriguitars Vintage & Old-Timer Designs 51 Jan 08, 2014 08:42 PM
Contest "BIPLANE Plus" Build Off 01/07/2013 - 31/12/2013. now FIFTEEN completed entries! Sundancer Vintage & Old-Timer Designs 247 Dec 29, 2013 05:16 PM
Discussion Kakadu - BIPLANE Plus Build Off July-Dec 2103 Harry Rule Vintage & Old-Timer Designs 13 Jul 08, 2013 01:10 PM