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S.P.A.D. Aircraft - Coroplast design Discuss the growing area of S.P.A.D.S. (Simple Plastic Airplane Designs). Coroplast type aircraft, pizza box planes, etc..

Spad Trainer

Old 05-25-2008, 02:05 PM
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Default Spad Trainer

Hi everybody.

I wanted to share my experience with this plane.
I built it about 3 years ago, when I was experimenting with coroplast. But before finishing it I destroyed a wing on my RTF trainer. Without thingking a lot, I adapted the fuselage of ARF for a coroplast wing and ... it was again a perfect flying plane.
As I moved to bigger planes, I gave that one to a friend of mine.

Since then the coro fuselage was sitting in my workshop.
Some months ago I decided to build a plane with my 8 year old son. We installed an engine, servos, pushrods to it, but as I wanted to show him also how to build from balsa, I apologize to pure SPADDERS ;-) , we build a classic flat bottom (Clark Y) balsa wing.

Than we painted it with HVLP gun and oil based painting.

I have tested it this weekend. It need only about 8 meters of runway to airborne softly. It flies really sloooowly - I think it will be a perfect plane to teach to my son and his friends to fly.

Thanks to all who contribute to this forum. It was very helpful to me.

Marian


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Old 05-26-2008, 11:47 AM
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Default RE: Spad Trainer

Marian,

Muy bonita! You've created a coro-masterpiece! Not only does the plane look great, you did an excellent job with the paint!

What engine and prop?

SPAD skies,

DL
Old 05-26-2008, 07:05 PM
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Default RE: Spad Trainer

Thank you DL,

In fact the plane is not extremelly light (1.800 gr, 3,9 lbs) because I have overbuilt the tail surfaces and wing spars could be done from balsa instead of spruce etc.
But it still flies very gently because of the wings area, which is aprox. 560 sq. inches.

The engine is MVVS .28 with MA 9x5 and is a perfect match for this plane.

As for painting: my goal was principally to try if painting on coro would resits. So far it is OK.
Colour scheme on the top of the wing and elevator is very easy to do. You can see the material I have used for masking ...

Regards, Marian
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Old 06-07-2008, 05:27 PM
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Default RE: Spad Trainer

iQue chevere tu SPAD! Now that is cool! That looks like it will be a nice trainer. I can't wait to see more of your SPAD creations.
Old 06-27-2008, 09:24 PM
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Default RE: Spad Trainer

Great looking plane. What kind of paint are you using. I need to do some painting and not sure what to use.
Old 06-27-2008, 09:28 PM
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Default RE: Spad Trainer

Great looking plane. What kind of paint are you using. I need to do some painting and not sure what to use.
Old 07-03-2008, 04:29 PM
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Default RE: Spad Trainer

Hi Hillis,

I used this project a little bit for testing various technics:
The wing is not coro, it is covered with material similar to Koverall, (dope + iron). Here I used the most usual brand of acrilic painting (water based).
I have used this one: http://www.bruguer.es/es/products/ov...crylic+FyS.htm
Sorry it is in spanish, but maybe you find some interesting information for you there.
Another brand: http://www.titanlux.es/productos.asp...nea_producto=1 and then "Water-based acrylic paints"

This painting DOES NOT resist fuel, NOR it too scratch proof.
I use it because it does not smell and it is easy to clean tools (just water).

For fuel proofing I used clear polyuretane for wood floors.
There are several grades. On this project I tested one which is thinned by water and another thinned by white spirit.

I was not very satisfied by results achieved with the one thinned by water.
On the oposite, the one thinned by white spitir was perfect (but it smells horrible).
I used this paintings also for Kaos on attached fotos (only wing is painted, the rest is Oracover). Kaos is not SPAD.


Fuselage & tail (COROPLAST SURFACES):
Acrilic painting does not stick to coro very well.
So I used synthetic lacquer, brand Titanlux: http://www.titanlux.es/productos.asp...nea_producto=1

As I do not know the brands of these products in you country, I put here description from the manuacturer:

Characteristics
General purpose synthetic lacquer paint. For indoor and outdoor use. Quick-drying. To protect and embellish any surface: doors, furniture, vehicles, machinery, etc. All the colours of this wide range are intermixable to be able to create the required shade. The white is extraordinarily bright and resistant to yellowing.
Use in: Indoors and outdoors.
Application: Brush, roller, spray-gun and immersion.
Nature Synthetic alkyd.
Drying: 1-2 hours at 23ºC.
Second coat: 6-12 hours.
Coverage: 12-14.5 m2 per litre and coat.
Thinner: TITAN Synthetics and Grease Solvent or TITAN Pure Turpentine.

Is it something similar to Rustoleum?

I have cleaned coroplats one side with alcohol + one Schotch brite and another side only alcohol (no abrasive material)
No aditional fuel proofing.
No problem at all.

I noticed a great improvement when I started to use HVLP spray gun. I is not expensive SATA, just 23,00 eur chinese Mini HVLP which I bought on e-bay, but it is perfect. I am very happy with it.
It came with three nozzles: 0,8 mm, 1 mm and 1,5 mm, but I use only 0,8 mm
HVLP need a lot of air, but for this MINI HVLP a standard 24 l (5 gal ?) compressor is fine.

Regards,

Marian



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