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Apr 22, 2011, 10:27 AM
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Aero Andy's Avatar
Build Log

Spitfire......EPP full fuse 20"ws.....**VIDEO ADDED**


I've started building this Spitfire to take a 18-11 10g motor. It will be Cox warbird size, but I want it to be able to take a few knocks so I'm using 6mm EPP, the terrain is pretty rugged here, so there's no nice green fields to land in. I decided on full fuse because I want to be able to hide all the gear away inside the fuselage, I think it looks cleaner that way.
Anyway, here's a few photos so far.

Andy


EPP Spitfire (3 min 0 sec)
Last edited by Aero Andy; May 14, 2011 at 08:15 AM.
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Apr 23, 2011, 01:16 PM
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Aero Andy's Avatar
Quick update.
Firewall and 10g motor fitted, along with tail section.
Andy
Apr 23, 2011, 05:22 PM
Registered User
Andy

Your spitfire looks good. Keep us posted with progress pictures.
Apr 23, 2011, 06:57 PM
Rhys - Forever Learning
Looking good so far
How did you make the fuz?
Apr 24, 2011, 12:26 AM
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Aero Andy's Avatar
Quote:
Originally Posted by rhysduk
Looking good so far
How did you make the fuz?
To make the fuse I made two elongated "tear drop" shaped tubes, one larger and one smaller. By rolling the EPP at the top and pinching together the bottom with hot glue, you end up with a tear drop shape. I then added a 35mm wide flat strip of EPP along the fuse length with a BBQ skewer glued to it, this rounded the top section more and made the whole thing rigid. The cockpit is polystyrene stuck on top of the smaller tube and sanded to shape.
Regards
Andy.
Apr 24, 2011, 04:48 AM
Rhys - Forever Learning
Excellent idea thats both quick (i assume) and cheap! very nice.. Do you have any other photo's of the fuselage build?
Are you building this from an existing Spit or do you have plans? Noticed you mentioned it Cox size though.

PS: Where in Spain are you? From the videos it looks like Gran Alacant but its all the same out there
Apr 24, 2011, 08:00 AM
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Aero Andy's Avatar
Hi Rhys

Sorry I forgot to take pictures at the very start, but I'll be doing a P-40 after this one, so I'll do a proper build log. I already have a few Gravity Cox warbirds, so getting the size right was easy, no plans though, just doing it by eye from a photo I printed out. I'll put together some plans for the next one though.
Hopefully maiden it tomorrow before I spray it, I'll let you know how it flies.

I'm in Mazarron, Murcia. Just 70km south of Alicante, so you were spot on with Gran Alicant, good guess.

All the best
Andy
Apr 24, 2011, 11:26 AM
TEAM HILLBILLY
Eagle34's Avatar
Awesome work as usual Andy. Looks great.
Apr 24, 2011, 12:33 PM
Lawn dart pilot/builder
Prime_8's Avatar
very slick ... i love those wee 10g motors .

great way to do a fuze .
Apr 24, 2011, 05:18 PM
Crashing but learning...
Wildweasel09's Avatar
Very good Andy!
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Apr 26, 2011, 12:50 AM
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Aero Andy's Avatar
Thanks Guys, glad you like the idea of the rolled fuze.
Ok, well I've maidened it, and it flew all right, but not great. So I've made some changes, and now it flies perfectly. Here's what I altered.

Changed the kf airfoil for a simple under camber wing.

Cut along under the length of the fuze and widened the underneath by 12mm, this gave the wing more stability and I was able to push the gear farther forward to get the CG right.

Added more surface area to the elevator to gain better authority.

Now it flies as it should, I'll get a video sorted over the next day or two. In the mean time I've sprayed it up and I'll post some pictures later.
As a prototype I'm really pleased with it, but I'll be doing another build incorporating these alterations from the start.

Andy
Apr 28, 2011, 12:10 AM
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Aero Andy's Avatar
Here's the finished Spitfire, all painted up.
Andy
Apr 28, 2011, 12:42 AM
Lawn dart pilot/builder
Prime_8's Avatar
looks good man.
Apr 28, 2011, 03:10 AM
Rhys - Forever Learning
Looking very nice Andy
Just noticed the belly of the bird, surely you're going to be putting skids or wheels on it? That aileron servo will get ruined other wise
Apr 28, 2011, 08:18 AM
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Aero Andy's Avatar
Quote:
Originally Posted by rhysduk
Looking very nice Andy
Just noticed the belly of the bird, surely you're going to be putting skids or wheels on it? That aileron servo will get ruined other wise
Hi Rhys

That's a good point, I think I'll quickly glue a couple of under wing scoops on this one, as it was just a trial build. The next Spitfire will be a proper build from plans I'll sketch up, and post, and I'll be adding landing gear on that one.

Cheers
Andy


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