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Comments: 7


New toy for slope & field

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Re: New toy for slope & field

Post by Tim on Tue Jul 13, 2010 11:16 pm

I second the MVVS redliner - a superb bit of engineering
HERE

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Re: New toy for slope & field

Post by Guest on Tue Jul 13, 2010 11:28 pm

Dimensions of the MVVS 5.6/960 Redliner HERE
Looks to me like a 26mm stator but 36mm over can - ergo, no go Crying or Very sad

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Re: New toy for slope & field

Post by Tim on Tue Jul 13, 2010 11:29 pm

The Turnigys are great VFM motors - I have several. However for pure class and engineering quality the MVVS ( and Mega of CZ ) are hard to beat.
That Turnigy is good ( and I use the word advisably ) for around 450watts max - whereas the redliner 960 will handle 600 if needed.
Knowing your penchant for power.... and your policy on "buy cheap buy twice"
I think you must seriously consider the 960 Kv redliner ( probably swing larger props too than the 100Kv Turnigy before letting out the smoke ) Cool

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Re: New toy for slope & field

Post by Rich on Tue Jul 13, 2010 11:34 pm

I can't find a 28mm version unless I'm blind

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Re: New toy for slope & field

Post by Tim on Tue Jul 13, 2010 11:38 pm

Ah well if that's the "case" as you say...it wont fit :-(

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Re: New toy for slope & field

Post by Tim on Tue Jul 13, 2010 11:39 pm

trouble is finding a 28mm unit that can handle circa 500 watts.

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Re: New toy for slope & field

Post by Rich on Tue Jul 13, 2010 11:41 pm

I know, may have to get Turnigy then look for something a bit more special

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Re: New toy for slope & field

Post by Rich on Tue Jul 13, 2010 11:43 pm


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Re: New toy for slope & field

Post by Tim on Tue Jul 13, 2010 11:56 pm

I really think it unlikely that you will find 28mm motor that can handle much more than around 45A ( which is approx 450Watts on 3s )
Even then, these are likely to be high revving ( high Kv )motors more suited to smaller props - so you may end up having to use either
1) A lower power unit
2) An inline gearbox on high Kv inrunner.

Rob at giant cod does some budget 28mm motors which are good for around 40+A such as THESEHERE

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Re: New toy for slope & field

Post by Tim on Wed Jul 14, 2010 12:03 am

Or if you want the quality stuff....these 28mm Mega inrunners ( use with suitable inline gearbox ) are good for 60A ( 600 watts )http://www.megamotor.cz/v3/script/default.php?&sid=56e81a99f99317a62841b745b5966cee&page_id=lang_eng

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Re: New toy for slope & field

Post by Mark Barnes on Wed Jul 14, 2010 8:28 am

Hennce the 28mm can motors he he,

The TG motor was just a quick find as Rich seemed to be getting abit frustrated last night, I`ll look for a more sutible one today we guestimate needing about 600watt

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Re: New toy for slope & field

Post by Andy Sayle on Wed Jul 14, 2010 9:26 am

So to do a proper job, you are looking for about 800-1000 then? Twisted Evil

If you canna squeeze a 36mm motor in there, then the geared inrunner is definately going to be your best bet. If you don't mind spending a bit of cash, then a Hacker B40L, with a 4.4:1 maxxon ceramic gearbox would be the dogs danglies. Go for the 9L, or 10L, and you should be running at about 60 amps on a 3s lipo (with a 14 or 15" prop). That motor will just laugh at that sort of current level all day..

The other slightly cheaper option, but still several leagues above the chinese tat, is a Mega 16/25 series motor, again coupled to a maxxon 4/.4:1 gearbox (or possibly the model motors VGMG gearboxes). I think Mega do some not so common 16/30 and 16/35 motors too (same dia, longer can/magnet for higher power handling) that would be able to take more power. The 16/25 high kV motors will happily take about 50-60 amps though...

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Re: New toy for slope & field

Post by Guest on Wed Jul 14, 2010 9:30 am

Would the use of an extension shaft supported on ball races, thus pushing the motor further back into the fus. give the required space Question . Would require some carefull engineering and alignment to work. study

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Re: New toy for slope & field

Post by Mark Barnes on Wed Jul 14, 2010 9:31 am

Allan you cant even get them through the fuz opening

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Re: New toy for slope & field

Post by Guest on Wed Jul 14, 2010 9:33 am

Problem solved cheers - GET ANOTHER GLIDER clown clown

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Re: New toy for slope & field

Post by Tim on Wed Jul 14, 2010 9:37 am

The mega I suggested earlier was the 16/40 - ( even longer can than the 35 )
They do a super hot 1 wind version thats good for 80A Shocked
High Kv of course, so again the inline gearbox as suggested is the way to go.
Cant find a decent mega gearbox...ya got a link to the maxxon ceramics Andy?

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Re: New toy for slope & field

Post by Tim on Wed Jul 14, 2010 9:42 am

Ah, only one X - MAXON Very Happy
maxon

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Re: New toy for slope & field

Post by Andy Sayle on Wed Jul 14, 2010 9:55 am

yeah, sorry Tim, I got a bit over-excited with the X key..... The one that Hacker always use on their motors is part number 144027...

Now that my Graphite has died, is it wrong to be considering one of these too Rich?

Andy

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Re: New toy for slope & field

Post by Mark Barnes on Wed Jul 14, 2010 10:04 am

christ some of the prices being spoke about here are crazy, do you really need a £100 motor in a 2.1mtr plane for livley performance

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Re: New toy for slope & field

Post by Andy Sayle on Wed Jul 14, 2010 10:08 am

Not really. But do you really need the MG version of a Marks Roly-Poly MG to get to work in the morning? Much cheaper to get a little clapped out old fiesta..... Twisted Evil

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Re: New toy for slope & field

Post by Mark Barnes on Wed Jul 14, 2010 10:18 am

ahh but i wouldnt get my planes in a fiesta, O wait maybe i would as i dont have a bigun anymore

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Re: New toy for slope & field

Post by Guest on Wed Jul 14, 2010 10:30 am

'' .....I dont have a bigun anymore!'' Old age and too much booze will do it every time Twisted Evil

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Re: New toy for slope & field

Post by Bob G on Wed Jul 14, 2010 11:01 am

Hi
The glider I have is the 2.5m version, wanted to fit the redliner into it but as has already been noted sadly IT WOULD NOT FIT!
Don`t think 4 cell lipo`s will fit into fuse (width?..but have not tried.)
The setup I eventually used and gives a respectable performance at a respectable price was...

MEGA 22/30/3E
JETI SPIN 66
Currently using 13x8 prop

Was happy to use this setup as it does not require a gearbox, is a quality esc and gives 5 amp for servo`s so no need to use a UBEC and separate battery. (more spce for bigger capacity battery?)
Andy put his meter on it and it is nowhere near it`s max and has suggested trying a 14x9.
I am however using 2x 3 cell 2200Mah lipo but in parrallel but only because it needed nose weight to balance. Shame to carry lead!
I would imagine this would give a good performance in a smaller airframe at a not too silly outlay. hope this helps.

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Re: New toy for slope & field

Post by Rich on Wed Jul 14, 2010 11:10 am

Thanks Bob for bringing the post back on track, the setup you have seems to be something where I need to be, unfortunately the can is 36mm, I need a 28mm diameter.

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Re: New toy for slope & field

Post by Bob G on Wed Jul 14, 2010 11:24 am

AHH sorry Rich, I forgot....thought the nose was the same size as mine, didn`t read the post`s properly.
John Emms at puffin was very helpful if you send him full details of airframe spec. but be careful of his suggested prop sizes as I think he err`s on the conservative side sometimes.

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Re: New toy for slope & field

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