|
|
|
Jut got this rare kit last weekend,so not build thread yet. But, there will be one!
The Model Merchant MB5 was a nominal .60 size glow model...sure wish there was something a little smaller than the main motor subject of this thread, but I might still go with it and adjust the prop choice, if possible, to get the model to have around 120-150 watts per pound, or perhaps around 900-1200 watts total. Would prefer a 6S option, or even some setup with two 3S packs, but we will work with what we have to work with. Didn't someone do something set up a bit like the old Byro drive where you could use one outrunner, with a power takeoff off the back of the outrunner using a belt and off the front using a gear and concentric shafts? Using a belt at the rear makes that shaft turn the same as the case of the outrunner and using a spur and pinon gear at the front makes that shaft turn the opposite direction. Not as elegant as two outrunners, but might be easier going this route to get the exact power system and power levels I need. |
Latest blog entry: My 2022 event schedule.
|
|
|
|
|
|
Check out the himax contra rotating motors, I think there are 4 in their range. I have a funny feeling they are missing something around the size you are looking for though.
The other option us to just have a prop spinning in a bearing, not connected to the drive. |
|
|
|
||
|
Quote:
But, the second largest one might well serve propped down to draw around 1200-1500 watts. I got such a steal on the old MB5 kit (50 bucks, missing a couple of minor parts), I could go for a $350 motor if I had to. I would rather fly it on one prop and skip the freewheeler than have a freewheeler. |
|
Last edited by Thomas B; Aug 09, 2012 at 10:27 PM.
|
||
|
|
|
I had the same problem. They need that motor in the middle! I erred on the side of caution and got the bigger one
|
|
|
|
||
|
Quote:
|
|
|
||
|
|
|
I was unfamiliar with the MB-5.
So here is a link for dummies like me! http://en.wikipedia.org/wiki/Martin-Baker_MB_5 |
|
|
|
|
|
|
|
|
|
|
|
Hi all
If you want to know a bit more about the MB5 I've added some more links below. http://www.martin-baker.com/about/mb1-mb5 unfortunately they seem to have removed the link to Mr Martin’s Memorable M.B.5" – A Reprinted from Air International, 02/79. A very good piece on the history of the MB5, I may still have the file some ware, if I can find it I will PM it to you (but it wont be for a couple of weeks). Also look out for the book, "Sir James Martin: The Authorised Biography of the Martin-Baker Ejection Seat Pioneer" Here's my take on the MB5 & a how to build your own 1400W 4cell motor My TCM3.1 contra motor My1/8th scale MB 5 |
|
|
|
|
|
Any news Scatsob? I see ESM have brought out Generation 3 of their retracts......
|
|
|
|
|
|
This project was for sale awhile back.
Here it is. https://www.rcgroups.com/forums/show...ht=esm+spitfir |
|
Last edited by TripleW; Dec 15, 2012 at 05:44 PM.
|
|
|
|
Bummer! Thanks for the link TripleW.
|
|
|
Thread Tools | |
Similar Threads | |||||
Category | Thread | Thread Starter | Forum | Replies | Last Post |
Discussion | 36" spitfire Mk 1X thread build | giveitstick | Electric Warbirds | 4 | Oct 24, 2010 05:59 PM |
Build Log | Spitfire Fr MK XIVe fest 09 build | joemach1 | Slope Soaring | 128 | May 06, 2009 05:36 AM |
Build Log | 32" span Mk Vb Spitfire- "Prinses Beatrix" build | rcminiman | Scale Kit/Scratch Built | 19 | Nov 23, 2006 11:50 AM |
Discussion | Plans or kit for the bubble canopy Spitfire mark XVIII or XIX | peterpont | Fuel Warbirds | 5 | Sep 14, 2006 06:00 PM |
Finished Depron CD-Rom PR MK-XIX Spitfire | mtflyr | Foamies (Kits) | 20 | Aug 20, 2004 10:42 AM |