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Motor Falke ¼ scale - Cliff Charlesworth.

Let us all watch your new project progress.
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Max Wright
Posts: 120
Joined: 10 Mar 2020, 19:57
Location: Clayton Bay South Australia

Motor Falke ¼ scale - Cliff Charlesworth.

Post by Max Wright »

There is a lot of waiting associated with this sport.

lasercutsailplanes.co.uk were very quick getting the plans and short kit to me.

. . . but I'm still waiting for my magnets from airfieldmodels.com

https://airfieldmodels.com/store/magnet ... sories.htm

As this is really my first "proper" build, I may be leaning on you all to get me through.

What have I received is my magnetic building board and I've build a Robbie Bridson fuse building jig . . .
T-61A 1.JPG

and my Cliff Charlesworth "Model Gliders" book from sarikhobbies.com

We were worried that it had become lost, so Barry sent me a replacement. When it arrives, I'll return it.
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T-61A 2.JPG
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Max

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Max Wright
Posts: 120
Joined: 10 Mar 2020, 19:57
Location: Clayton Bay South Australia

Re: Motor Falke ¼ scale - Cliff Charlesworth.

Post by Max Wright »

In the meantime, I've read the tribute thread for Cliff Charlesworth, and I've read his book several times.

When the magnets arrive, I thought that I would start with the rear stabiliser.

It seems to be the logical place.

Cheers
Max

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Max Wright
Posts: 120
Joined: 10 Mar 2020, 19:57
Location: Clayton Bay South Australia

Re: Motor Falke ¼ scale - Cliff Charlesworth.

Post by Max Wright »

I've already had some excellent advice from Trevor - as well as links to his build.

With Trevor's permission, I want to post the links here so I can keep going back to refer to them.

http://www.bartonhewsons.uk/home/modelf ... ydata.html

https://www.rcgroups.com/forums/showthr ... tor-Glider

Thanks, Trevor.

The most interesting (and terrifying), aspect I've found so far is the unusual box spar for the wings. It will certainly be an achievement if I can pull that one off.

I'd better get my big boy's pants on. :lol:

Cheers
Max

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Peter Balcombe
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Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Motor Falke ¼ scale - Cliff Charlesworth.

Post by Peter Balcombe »

Max,
The box spar method was often used by Cliff Charlesworth in his designs.
I normally build onto the lower spar, but if you can cut the ribs accurately/line up LE & TEs then the box spar method also works.
I know several builders who also like Cliff’s method.
Peter

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Max Wright
Posts: 120
Joined: 10 Mar 2020, 19:57
Location: Clayton Bay South Australia

Re: Motor Falke ¼ scale - Cliff Charlesworth.

Post by Max Wright »

Thanks, Peter

I appreciate your remarks.

Cheers
Max

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Max Wright
Posts: 120
Joined: 10 Mar 2020, 19:57
Location: Clayton Bay South Australia

Re: Motor Falke ¼ scale - Cliff Charlesworth.

Post by Max Wright »

OK. I've had a few days to read Trevor's thread over and over. Thank goodness for it - or I would be stonkered. :shock:

Reckon that I'll have a crack at the wing. I'll order a sheet of 3mm spruce for the spar; but I will need a Graupner 15mm wing joiner tube.

It looks like it's rectangular (or oblong) in the photos - made of brass.

And that tells me that the wing joiner is flat - maybe steel or aluminium?

Does anyone have an idea where I could obtain these bits?

Cheers
Max

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Peter Balcombe
Posts: 1221
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Motor Falke ¼ scale - Cliff Charlesworth.

Post by Peter Balcombe »

Max,
The wing joiner system on most of Cliff’s designs (and many others) comprises a flat carbon steel (steel is somewhat similar to piano wire) strip in a 0.5mm wall thickness brass box.
The original designs probably used a 14x2mm steel strip in a 15x3mm O.D. brass box.
However, owing to problems in getting reliably fitting materials a few years ago, this arrangement has been superseded by a 15x2mm strip in a 16x3mm brass box.

In the U.K. the strip/brass box combinations can be found in 1m lengths at Gliders Distribution, but I don’t know if you have an equivalent source own under.
Peter

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Max Wright
Posts: 120
Joined: 10 Mar 2020, 19:57
Location: Clayton Bay South Australia

Re: Motor Falke ¼ scale - Cliff Charlesworth.

Post by Max Wright »

Thanks, Peter.

I wish I'd known about Gliders Distribution when I started restoring my A-14. It had a strip and box system, but I wasn't able to find anything like that in Oz. I ended up using a 15mm carbon fibre rod in a plastic conduit tube. :?

Anyway, I'll Google GD and get a set underway.

The plans are dated 1988, so I guess things have moved on a bit.

I appreciate your help.

Cheers
Max

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Max Wright
Posts: 120
Joined: 10 Mar 2020, 19:57
Location: Clayton Bay South Australia

Re: Motor Falke ¼ scale - Cliff Charlesworth.

Post by Max Wright »

They're called gliders.uk.com now.

It's out of stock at the minute, but I've paid for a set and it's gone to back order.

So I'll start sourcing the timber - and continue working on my A-14, as well.

This was never going to be a quick build. :lol:

Cheers
Max

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Max Wright
Posts: 120
Joined: 10 Mar 2020, 19:57
Location: Clayton Bay South Australia

Re: Motor Falke ¼ scale - Cliff Charlesworth.

Post by Max Wright »

So, I'm still in limbo land, waiting for stuff . . .

The building magnet devices were ordered and paid for on the 18th of August . . .

The steel blade and brass box were back ordered (and paid for), on 10th September . . .

I'm going to the city tomorrow for work. I'll see if I can get the timber for the box spar.

Cheers
Max

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