Marty d's CH-701 build log

[Blueadventures]

9 hours ago, Moneybox said:

I've bought an industrial Wagner airless spray gun. We used to use a similar Graco back in the 70's for applying marine coatings. They say it won't give the fine gloss finish of a regular spray gun but there's no overspray. I actually bought it to paint the old 1910 house that we've now sold without using the spray gun but I'm eager to give it a go. I think the choice of coating will determine the finish more than the gun used. 

Select the paint then get the right spray gun and a compressor that gets right pressure and volume.  You don’t want to muck up the finish and need a gloss finish.  Cheers and look forward to seeing the painted bird. 

[danny_galaga]

18 hours ago, Marty_d said:

Beautiful day down here today.  Low 20's but feels hotter, no wind.
Good day to test the inflatable spray booth I bought in winter and haven't unpacked since.  Second hand, never used.
All went well - the two pumps work great, the whole thing was up in about 5 minutes.  Windows have removable panels with filters and the whole inside is pressured by the small pump, so you don't get any nasties coming in.

The booth has clear windows, skylights and loops to hang LED strips, so will get a couple of those too.  Will probably need to bring down extension cords from two different circuits.  Both fans went off one, but I wouldn't like to add a compressor as well.

I have the quote for all the paint and accessories.  Will set up some racks / tables for the smaller bits.  Measured the interior of the booth while it's up, the main room is 6m long and my plane is 5.9m from prop to end of fuselage. 😄

Masses of space inside, it's about 4m wide so there's room to get around the plane.  Didn't measure the height but they're advertised as 3m.

Even managed to get it back in the bag afterwards, which I consider the crowning achievement!
Will also buy some tent pegs and guy ropes before I put it up again.  It was fine today but any wind on it and it'd want to run away.
 

I love jumping castles 🏰 

 

[Moneybox]

If you are not a painter then I suggest you find some old panels for practise, car door or bonnet, old washing machine or similar. You don’t have to mess up your new booth, just practise/learn outside.

[skippydiesel]

Check out the Stewart Paint System - follow the instructions to the letter and you will surprise yourself at how good the finish is.

 

https://stewartsystems.aero/

 

😈

[BrendAn]

22 hours ago, Moneybox said:

I've bought an industrial Wagner airless spray gun. We used to use a similar Graco back in the 70's for applying marine coatings. They say it won't give the fine gloss finish of a regular spray gun but there's no overspray. I actually bought it to paint the old 1910 house that we've now sold without using the spray gun but I'm eager to give it a go. I think the choice of coating will determine the finish more than the gun used. 

They are for painting fences and houses. You would lay on far too much paint for an aircraft.  

Blue adventures advice is good. Buy the right gear..

[Moneybox]

 

I like this setup but you might want to consider static charge while painting. A nice spray mist of a highly flammable substance and a static ignition source and you might have more excitement than you wish for.

[skippydiesel]

4 hours ago, Moneybox said:

 

I like this setup but you might want to consider static charge while painting. A nice spray mist of a highly flammable substance and a static ignition source and you might have more excitement than you wish for.

The Stewart System is:

• Water born - so fare less flammable and toxic than standard two pack paints
• Low Pressure/High Volume application  - very little "mist " most of the paint hits the target,rather than drifting of into the environment.

I purchased the right "gun" & compressor to suit. Not every compressor will deliver sufficient volume of low pressure air 25 psi (from aged memory)

 

There may be other similar products.

😈

[BrendAn]

6 hours ago, Moneybox said:

 

I like this setup but you might want to consider static charge while painting. A nice spray mist of a highly flammable substance and a static ignition source and you might have more excitement than you wish for.

I think the airflow would maintain a mixture to lean to ignite. Thousands of spray booths used every day you would think they are safe.

[Blueadventures]

6 hours ago, Moneybox said:

 

I like this setup but you might want to consider static charge while painting. A nice spray mist of a highly flammable substance and a static ignition source and you might have more excitement than you wish for.

Wear cotton.

[skippydiesel]

I wore disposable hooded overalls. Light weight, comfortable to work in, no washing and cheaper to purchase than cotton etc.

 

I modified an engine stand as a wing jig that could be rotated, so that both sides could be painted in the one job (rather than paint one side - dry - flip - paint the other).

 

The fuselage underside was painted by temporarily modifying, using a hydraulic elbow,  my paint gun reservoir, to sit near vertical with the gun pointed up. I painted lying on my back.

😈

Edited Wednesday at 10:58 AM by skippydiesel

[Moneybox]

3 hours ago, Blueadventures said:

Wear cotton.

I was thinking more of the all plastic environment, nothing sitting on a concrete floor.

[Marty_d]

10 hours ago, Moneybox said:

 

I like this setup but you might want to consider static charge while painting. A nice spray mist of a highly flammable substance and a static ignition source and you might have more excitement than you wish for.

Ground strap? But from where?

[rgmwa]

It’s Tasmania. Just wait for the rain. 

[Marty_d]

Public holiday here today, so spent the day installing the port flaperon control rod cover.

64 rivets - not sure why I didn't fire up the compressor, stupidity may be a factor...

 

[BrendAn]

Marty, are you going to treat the inside with alodine, the green stuff the aviation workshops use.

I think that's what it's called.

[facthunter]

Alodine and alumiprep it's called. It leaves it a yellow colour I think. I still have some I got from Aviall.  You would be well advised to use it.. Nev

[Marty_d]

37 minutes ago, BrendAn said:

Marty, are you going to treat the inside with alodine, the green stuff the aviation workshops use.

I think that's what it's called.

I don't think so.

The alloy is 6061-T6 which has anti corrosive properties.

The L4 who has done 2 inspections has advised me to get some Cor-Ban spray and give enclosed areas a blast with that (I did buy some but turns out it was the wrong type).

 

[sfGnome]

So which is the right type?

[Marty_d]

1 hour ago, sfGnome said:

So which is the right type?

Not the one that's designed for wiring, apparently 😄