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Magnum Review (Engine West 50V1)

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Old 07-14-2002, 09:34 PM
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Isaac F
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Default Magnum Review (Engine West 50V1)

Since I have no build my Magnum yet. I decide to make breaking to the West 50V1 Engine thats come with the Magnum.

I mount the engine in a 40 size airplane with header and pipe.
The Gap between the Header and the pipe was 1cm
Prop: 10x6 APC
Fuel: Morgan Omega 10%nitro 17% oil
I add some ounces of Klotz 100% synthetic oil to the fuel
Glow Plug K&B HP

I Do 3 10 ounces tanks breaking.

I got 17,000 RPM with this set up


Why I only got 17,000 RPM?????
Do I have to use 15% Nirtro????
Do the Gap between the Header and the pipe has something to do with this?????


The only bad thing I can mention about the engine is that is was LEAKING fuel from the front bearing
I think this is a trade mark of Webra engines because I have 3 Webras 50 GT Speed engines and the 3 has the same fuel leaking problem on the front bearing.

I dont understand why they dont put a sealed bearing on the front??? Do any body has a clue for this?

Isaac
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Old 07-15-2002, 02:34 PM
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MMallory
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Default Magnum Review (Engine West 50V1)

Isaac,

Some engines are designed to "leak" through the bearings for lubrication. I haven't run my West 50 yet so I can't tell you if this is normal. I can say the instructions call for a 9x6, 9x7 or 8x8 prop. The instructions state if you do use a 10x6 to lenghten the pipe 1". This will definately cause a decrease in RPM. Also, make sure your prop and spinner are balanced.

Mark M.
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Old 07-15-2002, 04:25 PM
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Default Magnum Review (Engine West 50V1)

Isaac, the following is the result of two magnums experience:
- no fuel leak from the front berring
- there is no need of high nitro to get high RPM, infact I 'm using a 5% morgan with one extra oz. of turbine oil per gallon, an APC 9x7 and OS # 8 plug and I'm reading 18,500 on the ground,
my freind EVEN is using an APC 8x9 (the best prop for this plane)
and is well into the 19000 RPM.
- do not cut the pipe, make sure you have 1/8" between the header and the pipe.
Guido
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Old 07-15-2002, 04:58 PM
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Default Magnum Review (Engine West 50V1)

Hey av8or48, I read that Turbine oil is very dangerus because is can give you cancer. I read it here on RC Universe on the fuel forum. Well I will be shortend the gap between the pipe and the header and try some 15% nitro fuel. I will try diferent props.
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Old 07-15-2002, 06:41 PM
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Default Magnum Review (Engine West 50V1)

Guido, it's Evan....E-v-a-n....
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Old 07-16-2002, 04:08 PM
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Default Magnum Review (Engine West 50V1)

If anyone remembers what i said a while about APC 8x9's, we've now seen another bag of them, and they aint thin anymore and now being used again, thanks to who ever told me they might be ok again, i forget who that was.
i also forget which prop was used for the Wests break in, but now its 19,000 on 5% Prosynth, we're pretty sure Alan is using at least 10-15% to make his 'show' plane look quicker than it actully is in real life
the pipe and header shouldn't be too far apart, the joint will blow.
neither should they touch.
Dont worry about that bearing, Webra have a rep for the the best bearings, thats why Weston Went to them.
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Old 07-16-2002, 10:53 PM
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Default Magnum Review (Engine West 50V1)

One of my Webra 50 GT aerospeed needs new bearings.
The front one has some play.......I can move the prop a little.
So my question is: Can I put a bearing in the front that is Sealed in the front but open in the rear so it can get lubrication???


Also I read that Boca Bearings have a Ultra Seal Bearing that is sealed in both sides and it has a oil inside......What do you thing about this bearing for the front.

This is what they say:

http://www.bocabearings.com/hobby/index.htm
Ultra-Seal Engine Bearings:
Are you plagued with leaky front bearings? The dreaded oil spray oozing out the front of your engine? Here's the answer, our revolutionary new series of Ultra-Seals, designated by the code UU. Ultra Seals are frictionless, double sealed beneath the shields with ultra-thin Teflon seals that eliminate dirt, dust and corrosion. Unlike traditional bearings, they don't rely on the fuel to act as a lubricant because we seal in our incredible MidasTouch lubricant, giving you the added benefit of improved performance and longer life. And, they're backed by our exclusive 6-month warranty.



So what do you thinK???
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Old 07-17-2002, 03:59 PM
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Default Magnum Review (Engine West 50V1)

only 6 months?
sure this bearing isnt for low revving lathe machines ect, and not a 19,000 rpm engine.
i'd go with a sealed front end one if i was you
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