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Cox Engine of The Month
June-2024
F4D Phantom II's

"Cox .049 Marine inboard engine."

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Post  Phantom805 Sat Jun 02, 2018 4:54 am

Hi all,

After building the Peter Waters ME163 from a plan from the RCME October 1976 I have found that I do not have any information on where the centre of gravity COG should be.

We have some nice weather forecast here in the UK tomorrow and I would love to maiden the model. Any advice would be greatly appreciated.

Many thanksPeter Waters ME163 COG 20180611
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Post  1/2A Nut Sat Jun 02, 2018 5:52 am

The CG Location is about 4.1 to 4.2 inches behind former F-4 (per member notes on the download pg.)

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Just looking at it as a flying wing I would eyeball as shown with the red line.
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Post  Phantom805 Sat Jun 02, 2018 6:28 am

Excellent. Thank you very much!
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Post  1/2A Nut Sat Jun 02, 2018 6:53 am

Awesome build skill on this one well done sir!!  Thumbs Up
Please post a flying vid if possible even with a cell phone cam better than nada.
MAKE SURE YOU HAVE SOME REFLEX IN THE AILEVONS! I don't see any the plans should have shown some
to insure the builder dials some in.

For anyone wanting to tackle this unique plane here is the full size drawings that will expand to scale.

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Post  1/2A Nut Sat Jun 02, 2018 7:29 am

Reflex

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Post  balogh Sun Jun 03, 2018 9:43 am

I wonder how this bird and flying wings  fly without elevators? At least I do not see them installed. Or can the aileron substitute elevator as a flap? Just saw on the drawing it is called elevon...on my small RC planes the inverted throw of ailerons act as a substitute for rudder. But how are the aileron servos connected to the receiver to once act as aileron then as a flap or elevator i.e. the flaperon? ...Sorry for the blunt question from an autodidact RC flier.. Very Happy...
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Post  944_Jim Sun Jun 03, 2018 3:46 pm

See post #19 for a really clear picture of mechanical elevon control. This particular method was shown to me when I had a Sterling Vtail...I think it was the Bonanza.

https://www.rcgroups.com/forums/showthread.php?1954571-How-do-mechanical-V-tail-OR-elevon-mixers-work/page2
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Post  balogh Sun Jun 03, 2018 4:44 pm

Wow....what a unique solution...one of the servos is pushing/pulling the other one - a sliding servo - to have the latter drive the two ailerons connected to it in the same throw direction = acting like an elevator, otherwise this sliding servo stays in place and drives the ailerons in inversed throw dirction....fantastic.

Thank you for the clue..
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Post  944_Jim Sun Jun 03, 2018 6:53 pm

Did you see the one that puts a 3-way link on the mixing servo? That one doesn't have a sliding servo.Peter Waters ME163 COG Thumb-10
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Post  balogh Sun Jun 03, 2018 10:28 pm

Yes just noted with the 3way link the servo is fixed. Too bad the link is not sold anymore..
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