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Post by renard80 on Jan 19, 2012 23:49:51 GMT 1
Arrrggghhhh!!! I've just returned to this thread after a long day and found this wealth of useful information (for which everyone deserves thanks) - but which, sadly, puts me back to square one in terms of what motor I need. Here was me thinking all I needed was to buy one of those dinky Blue Wonders, bolt it on and away we go! I should have known it wouldn't be that simple.  To avoid spending out on different batteries, ESC and props from those already in my box, perhaps I need to forget ultra-lightweight and approach this from a different angle. My batteries are 1300mAH 20C 3S 11.1v - weight 100g. ESC is Hobbywing Pentium 40A. Props are 9x6. So rather than discard them, presumably I need to find the lightest compatible motor for my SC. Back to the drawing board! (Thanks also for the tip re. the Slow Stick, fly. Certainly food for thought there, although I don't want to abandon the good ol' SC just yet.)
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Post by flydiver on Jan 20, 2012 0:12:26 GMT 1
Abandon? HORRORS NO!
You just get another plane, right?
You can put almost ANYTHING on the SS and it will STILL fly nice as long as you balance it out.
You can't say that about the Cub.
BTW-If you would have actually READ the link to the 'light Cub' posting you would have known this days ago.
AND.....NO NO NO.
CG !!!!! PAY ATTENTION!!!!
You can't just stick a light motor on the front of a plane NOT DESIGNED FOR IT AND HAVE IT WORK OK.
It will then be out of balance.
You GOT to plan for the WHOLE package.
A light Cub is a COMPLETELY REDESIGNED CUB!!!
The Cub was DESIGNED with a big chunk of brushed motor and gearbox up front. EVERYTHING is thought out to work right and balance correctly out of the box. The MINUTE you start modifying it you have to understand ALL the consequences, ALL OF THEM!
If you can't, don't go there.
Bind and Fly was made for folks that can't or won't build.
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Post by john66 on Jan 20, 2012 1:40:22 GMT 1
Lightweight Cub would be a good idea for a topic, maybe even it's own a forum. .......... I bet John66 could come up with a lightweight power system package that would help us out a lot on correct component selection. Like it, like it, though I personally think thread rather than forum! ........... Im looking into it right now, though funnily enough whilst also looking into an ep beast that is....... www.hobbyking.com/hobbyking/store/__17984___Turnigy_RotoMax_1_20_Brushless_Outrunner_Motor.htmldue to wanting something larger to fly in the wind we are constantly having right now.....bah dosent the weather know its January and we're sposed to be having global warming? John |
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Post by renard80 on Jan 21, 2012 1:53:03 GMT 1
If you would have actually READ the link to the 'light Cub' posting you would have known this days ago. AND..... NO NO NO.
CG !!!!! PAY ATTENTION!!!!
You can't just stick a light motor on the front of a plane NOT DESIGNED FOR IT AND HAVE IT WORK OK. It will then be out of balance. You GOT to plan for the WHOLE package. A light Cub is a COMPLETELY REDESIGNED CUB!!!The Cub was DESIGNED with a big chunk of brushed motor and gearbox up front. EVERYTHING is thought out to work right and balance correctly out of the box. The MINUTE you start modifying it you have to understand ALL the consequences, ALL OF THEM! If you can't, don't go there. Oh dear, Fly, I fear I have tried your patience too far, for which I apologise. To be red-inked is the ultimate shame.  It's all my fault in not explaining properly. Yes, I had read the Butch thread. Yes, I do understand about balance and CG. My error was in saying I wanted to go lightweight. This has been misconstrued as meaning I wanted to strip everything down as Butch did. What I actually meant was that my replacement SC will be the stock plane, converted to brushless, with the stock battery type (100 grams), but without painting or heavy cowl reinforcement, as you have warned against this. In my incompetent innocence, I was simply hoping that some kind person could provide a link to a suitable lightweight motor to power this otherwise stock setup. I still am! ;D Sorry for not making myself clear. |
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Post by flydiver on Jan 21, 2012 2:32:23 GMT 1
Hope you do understand it.
Put a lighter motor up front > you have to figure out how to move other weight up front to balance it out.
This is possible and poses it's own set of challenges.
You can't just slap a light motor up front and you have a nice light Cub. You have to pay attention to the whole airframe.
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