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Cutting the manifold on the Weston Magnum

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Old 03-20-2003, 03:46 AM
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fullscale
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Default Cutting the manifold on the Weston Magnum

Hoping someone may know how much help cutting the manifold will give to the magnum? Have several flights on the bird and the pilot is one great stick. Has been know to roll knife edge at full throttle and within two feet of the ground and make a nice trip around the circuit about 50ft off the deck. Lands like a rock and wonder if cg maybe causing the effect. Would love some help.


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Old 03-20-2003, 03:51 AM
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Default Cutting the manifold on the Weston Magnum

I recommend reading this thread.

One thing worth mentioning: Aim to get the CG between 130 and 135 mm. This seems to be the best CG for easy and slow landings. At 120 mm (Isn't that what is recommended in the manual?) you might have some problems keeping the nose up on landing..
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Old 03-23-2003, 08:12 PM
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Default Cutting the manifold on the Weston Magnum

I found a lot of extra elevator dialed in is great for keeping the nose up on landing and just before you land you haul it on full and it acts as an air break. Really does a great job of making your landings very controlled.

You will probably find that you can't do this with the standard elevator rods as they bind, I changed from plastic in plastic to conventional metal/alloy in plastic and it works a lot smoother and gives better throw.

cheers.

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Old 03-24-2003, 12:38 PM
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Default Cutting the manifold on the Weston Magnum

What has chopping the manifold got to do with landing????
move the CofG back as described, give more elevator.
Chopping an inch off the manifold gives better performance on some props
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Old 03-24-2003, 02:07 PM
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Default restate question

OK this thread has not gone so well, forget the landing part. we land great. i really want to know if it is worth cutting up the $40 manifold for more performance? If it only increase a small amount than i will not do it, but if it is night and day difference then that sucker is cut in a heartbeat. Please help with this question.


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Old 03-24-2003, 02:19 PM
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Default Cutting the manifold on the Weston Magnum

On the APC 8x9's used here it makes a difference.
It was the Weston designer that told us to do it. the set up as it comes is a fit and forget for dummys. if you find it dosent work for you then you can chop another slice off the bit and slide it back in the silicon which is what i did with my Dust. ok it doesnt look as good as a short length, but it stops a blow out.
PM John d for more info on what he did and what prop/fuel combos he uses.
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