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Author Topic: New Model  (Read 444 times)
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Old Modeller
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« on: May 11, 2021, 07:25:58 AM »

It’s time to build something new, and hopefully aerobatic.   A pencil, and ruler, and here it is.

Will it fly though?

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Old Modeller
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« Reply #1 on: May 15, 2021, 06:41:02 AM »

Fuselage sides, and Formers F2,F3,F4 into the jig for gluing.

Alignment looks good.
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Old Modeller
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« Reply #2 on: May 15, 2021, 10:22:46 PM »

Out of the jig, with the tailplane trial fitting.
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OZPAF
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« Reply #3 on: May 16, 2021, 02:23:09 AM »

It looks interesting. Is it for a 40?

Good luck with it.

John
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« Reply #4 on: May 16, 2021, 03:41:13 AM »

Hi, it will have an OS 46 with tuned pipe.   Roughly the dimensions of a Q500, but with less drag.  

The fuselage outline is basically the excellent Keith Thomas, Pecker delta glider design, modified to a powered model, with a tapered conventional shoulder wing.   

Thanks for your interest.
« Last Edit: May 16, 2021, 05:40:59 AM by Old Modeller » Logged
Old Modeller
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« Reply #5 on: May 18, 2021, 07:17:45 AM »

The fin is next.  Must look cool, and built up is preferred.

Something like this.
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« Reply #6 on: May 20, 2021, 01:58:40 AM »

Built up fin in dry fit check.
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Old Modeller
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« Reply #7 on: May 20, 2021, 02:02:12 AM »

The next project already being planned.   Something like this probably.

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« Reply #8 on: May 20, 2021, 05:59:51 AM »

It's coming on well! I like your sturdy jig - nifty.

Will you be  using a built up or sheeted foam wing.

have fun.

John
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« Reply #9 on: May 20, 2021, 06:30:01 AM »

The jig is my own design which came about after some pondering when the original jig reached the end of its life.  I am pleased with the result.

I am still debating the wing design.  I have a set of sheeted foam wings I made some years ago, but I have recently cut a set of balsa ribs for this model.   I watched full size F18 Hornets take off today and am thinking swept wings might be in order.

More progress on the fuselage tomorrow, and then I will decide on the wing configuration.    Sweep back will affect the centre of gravity.

Much to consider.
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« Reply #10 on: May 20, 2021, 06:32:56 AM »

The tailplane needs a ply brace for mounting, and then hinging the aft control surfaces.   Hinging is a pain!
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« Reply #11 on: May 20, 2021, 08:10:42 AM »

Triangular stock is excellent for bracing, and gives the fuselage a rounded shape.   Also gives the bottom sheeting more bonding surface.   Thanks Phil Dell for this tip so many years ago.
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« Reply #12 on: May 21, 2021, 05:30:07 AM »

Bottom sheeting done, and rough sanding to shape.
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« Reply #13 on: May 21, 2021, 05:42:30 AM »

Looking more like the plan now.
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« Reply #14 on: June 08, 2021, 12:23:18 AM »

More pictures soon hopefully.   Work is busy at the moment.
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