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Semi-scale ASH25

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MDev
Posts: 150
Joined: 07 Oct 2018, 19:17
Location: WEYMOUTH

Re: Semi-scale ASH25

Post by MDev »

Board manufacturers shaping blocks of foam have white painted walls with waist level strip lights to complement a waist level saw horse type of supports. They use an electric plane with multiple blades for taking away large amounts of foam, most diy electric planes will only have the one blade and rip the foam.

Jolly Roger
Posts: 395
Joined: 30 May 2015, 20:35
Location: Sutton Bank, North Yorkshire

Re: Semi-scale ASH25

Post by Jolly Roger »

I can believe it Mark. Lighting is so important to a good job.

Did a little more today - made the fuselage root ribs from 6mm liteply with carbon. Also glassed and polished the spinner. The plan was to vac-form acetate over it but I now fancy something stronger and more resilient so may mold it from GRP. Something to mull over as I fall asleep. :)
Attachments
Root ribs and spinnerS.jpg

Jolly Roger
Posts: 395
Joined: 30 May 2015, 20:35
Location: Sutton Bank, North Yorkshire

Re: Semi-scale ASH25

Post by Jolly Roger »

Progress inches on, glacially.

With the foam fus plug 95% shaped, I switched to the wing root structure which is built separately to ensure accurate alignment of wing joiners and auto-connecting electrics.

The wing ribs are 1mm undersize all round to allow for the thickness of the glass skin when joined to the fuselage.

I moulded the glass wing joiner outer tube around the wing joiner itself.
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Jolly Roger
Posts: 395
Joined: 30 May 2015, 20:35
Location: Sutton Bank, North Yorkshire

Re: Semi-scale ASH25

Post by Jolly Roger »

Then it was time to cut the canopy and wing roots out of the foam plug. I wanted this to be done really accurately. In the case of the wings this was to hit the 1.6 deg longitudinal dihedral I found worked best in the original model. In the case of the canopy it’s because I love a beautifully fitted canopy. Is it just me that always looks first at the canopy when judging the workmanship of a model?

So I spent most of the morning making a jig then trimming, rechecking, fiddling, trimming etc... Honestly, I think I have undiagnosed OCD.
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Last edited by Jolly Roger on 09 Apr 2020, 16:48, edited 1 time in total.

Jolly Roger
Posts: 395
Joined: 30 May 2015, 20:35
Location: Sutton Bank, North Yorkshire

Re: Semi-scale ASH25

Post by Jolly Roger »

Then the plug was fitted into the jig and I reached for my sharpest hacksaw (yep I could have Hotwire cut it but I had stupidly left my paper templates attached to the foam formers, which would have stopped the wire in its tracks)
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Jolly Roger
Posts: 395
Joined: 30 May 2015, 20:35
Location: Sutton Bank, North Yorkshire

Re: Semi-scale ASH25

Post by Jolly Roger »

The cutting itself went well...just took my time and checked the saw was progressing symmetrically.
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Jolly Roger
Posts: 395
Joined: 30 May 2015, 20:35
Location: Sutton Bank, North Yorkshire

Re: Semi-scale ASH25

Post by Jolly Roger »

I’ve eyeballed it and measured it from every angle and I am 100% happy with the profile symmetry of the fuselage. This is not like me. Usually stuff goes wrong.

I test slid the wing root structure in place and it’s a satisfying fit. I now need to finish this structure before gluing into the main plug. Then it’s the canopy surround for which I have a cunning plan.
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Last edited by Jolly Roger on 09 Apr 2020, 18:55, edited 1 time in total.

User avatar
Barry_Cole
Posts: 1378
Joined: 10 Mar 2015, 09:30
Location: Hampshire UK

Re: Semi-scale ASH25

Post by Barry_Cole »

Well I hope it's better than one of Baldrick's !!!

:roll: :roll: :roll: :roll:

BC

Jolly Roger
Posts: 395
Joined: 30 May 2015, 20:35
Location: Sutton Bank, North Yorkshire

Re: Semi-scale ASH25

Post by Jolly Roger »

More cunning than a cunning fox with a degree in cunningness from Oxford University.

Jolly Roger
Posts: 395
Joined: 30 May 2015, 20:35
Location: Sutton Bank, North Yorkshire

Re: Semi-scale ASH25

Post by Jolly Roger »

Funny how sometimes model-building gallops on in leaps and bounds with lost of obvious progress, and other times you plug away for ages with nothing to show for it. This last week has been one of those other times.

Any road, I got the wing root centre section all finished and glassed with 200gsm, then sorted the nut and bolt that attach the front and back fuselage sections.

I also hollowed out the fuselage under the wing roots to leave about a half inch wall thickness, so that the servo wiring could pass through.
Attachments
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