Magnum XL.52FS
#5
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RE: Magnum XL.52FS
Mine ain't broke in yet so I am holding off on anything over 10% nitro. I tried a new Master Airscrew 11X6 3 series (kinda wide blade ) and it did an easy 10,800. Pe gives these a value somewhat higher than the original black props.
#7
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RE: Magnum XL.52FS
With my Graupner 10X6 3 blade (yup I gotta love them 3 bladed props, sorry) it gave me a still conservative 11,200 on Omega 10%. I will be trying an MA 12X6 Schimitar next.
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RE: Magnum XL.52FS
I saw you have made a beautiful rig to brake in or test your engine . Can you tell me why the center part of the fuel stopper has to be same hight as the mixture screw ? or does this effect engine performance on small size engine like magnum xls 15 and possibly small vacuum leaks at carburator Cinch bolt and nut?
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RE: Magnum XL.52FS
ORIGINAL: jeffie8696
With my Graupner 10X6 3 blade (yup I gotta love them 3 bladed props, sorry) it gave me a still conservative 11,200 on Omega 10%. I will be trying an MA 12X6 Schimitar next.
With my Graupner 10X6 3 blade (yup I gotta love them 3 bladed props, sorry) it gave me a still conservative 11,200 on Omega 10%. I will be trying an MA 12X6 Schimitar next.
#11
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RE: Magnum XL.52FS
It didn't like the 12X6 Scimitar at all. It runs much better with the 11X6 MA 3 series. And it runs fantastic on 25% Omega. I made certain it was well broke in before trying it and only after I was certain it could handle the extra nitro.
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RE: Magnum XL.52FS
I've been running mine on 10% nitro Magnum fuel with 70/30 synth/castor lubrication, a Fox Miracle glow plug, and a Master Airscrew 12x6 K-series prop. My XL .52 RFS ran just rich of peak power at 10,000 rpms.
#13
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RE: Magnum XL.52FS
Maybe the yellow-tip wood MA's are a higher load:
http://masterairscrew.com/12x6woodseriespropeller.aspx
I will try some other 12x6's and see if I can get nearer 10,000.
The 11,240 I got with the with the Graupner 11x6 calculates to .96hp and 6.19lbs of static thrust. That actually sounds about right for a .52 4-stroke. I don't know why the wood 12x6 is bogging it down so much. Maybe it's a miss-marked 12x8?
David
http://masterairscrew.com/12x6woodseriespropeller.aspx
I will try some other 12x6's and see if I can get nearer 10,000.
The 11,240 I got with the with the Graupner 11x6 calculates to .96hp and 6.19lbs of static thrust. That actually sounds about right for a .52 4-stroke. I don't know why the wood 12x6 is bogging it down so much. Maybe it's a miss-marked 12x8?
David
#16
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RE: Magnum XL.52FS
Tried a Top Flite 12X6 today and it made 9100 rpm. If you run the numbers it made a decent 5.5lbs and 45mph. Still think the MA 11X6 3 series is a better choice. But i need to get it airborne to be certain.
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RE: Magnum XL.52FS
This is not the same engine but for reference it may help you feel good about your 52. I have a Magnum 61 four stroke and it does 10000 with a MA 12x6 Scimitar and 10500 with a MA 10x7 three blade on 15% nitro.
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RE: Magnum XL.52FS
ORIGINAL: jeffie8696
Ithink the 52 can replace a 40 2stroke but not much more. Still, it has its positive attributes.
Ithink the 52 can replace a 40 2stroke but not much more. Still, it has its positive attributes.
ORIGINAL: jeffie8696
Ithink the 52 can replace a 40 2stroke but not much more. Still, it has its positive attributes.
Ithink the 52 can replace a 40 2stroke but not much more. Still, it has its positive attributes.