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Magnum XL.52FS

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Old 02-05-2009, 01:28 PM
  #1
jeffie8696
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Default Magnum XL.52FS

Still breaking in . 10,800 with a Merlin 4stoke plug, Omega 10% fuel, Graupner 10X6 3 blade.
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Old 02-06-2009, 10:30 AM
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Default RE: Magnum XL.52FS

Borgie, I feel sorry that nobody posted in your thread.[] So, I will.

I also have one of these. I don't have your prop, but I will tach mine with a MA 12x6 wood.

David
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Old 02-06-2009, 12:19 PM
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Default RE: Magnum XL.52FS

Dave you silly.
I use this as data storage for future reference , I don't really expect anyone to post a comment.
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Old 02-07-2009, 02:32 AM
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Default RE: Magnum XL.52FS

FWIW,
I get 11,200 with 15% Omega and a MAS 12X6 classic prop.
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Old 02-07-2009, 10:00 AM
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Default 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.
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Old 02-17-2009, 06:59 PM
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Default RE: Magnum XL.52FS

Hopefully my "fuel shipment" will arrive soon and if the weather holds I can get some more prop readings.
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Old 02-27-2009, 05:06 PM
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Default 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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Old 03-10-2009, 06:49 PM
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Default 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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Old 03-24-2009, 05:12 PM
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Default RE: Magnum XL.52FS


Quote:
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.
Just wondering if you ever got the numbers with the Master Airscrew 12x6 Scimitar prop ?
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Old 03-24-2009, 05:29 PM
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Default RE: Magnum XL.52FS

Funny coincidence, I ran mine again today. I'm only using 5% nitro. I got 11,240 with a Graupner 11x6 2-blade. I tried a MA wood 12x6 (yellow tips) and could barely break 9,000.

David
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Old 03-24-2009, 05:57 PM
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Default 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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Old 03-24-2009, 09:49 PM
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Default 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.
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Old 03-24-2009, 10:16 PM
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Default 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
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Old 03-25-2009, 06:46 PM
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Default RE: Magnum XL.52FS

And I was thinking it was just me and my MA Scimitar 12X6 . It didn't like that prop at all. But the 12X5 RevUp did well.
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Old 03-26-2009, 03:54 PM
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Default RE: Magnum XL.52FS

I like the APC 12 X 5. It is a completely different design from the APC 12 X 6
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Old 04-24-2009, 01:08 PM
  #16
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Default 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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Old 05-17-2009, 09:50 PM
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Default 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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Old 05-18-2009, 03:22 PM
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Default RE: Magnum XL.52FS

Ithink the 52 can replace a 40 2stroke but not much more. Still, it has its positive attributes.
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Old 05-19-2009, 09:09 PM
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Default RE: Magnum XL.52FS


Quote:
ORIGINAL: jeffie8696

Ithink the 52 can replace a 40 2stroke but not much more. Still, it has its positive attributes.
Quote:
ORIGINAL: jeffie8696
Ithink the 52 can replace a 40 2stroke but not much more. Still, it has its positive attributes.
I agree. The 52 four stroke is barely the equivalent to a ball bearing 40 two stroke. The 61 four stroke I have is barely the equivalent to a Thunder Tiger 46 pro. My61 is actually in long term storage, its to heavy for 30 sized planes and it just barely gets the job done on 40 size planes. I like the 70 four strokes a lot better on 40 size planes.
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