Really High Empty Weight?

[Guest]

Re: Really High Empty Weight?

Hi Chuck,

You want the dried weight not the wet weight.

Dave

[cvavon]

Re: Really High Empty Weight?

Dave i know that a portion of the solvents evaporate but it's a smaller portion then pigments. My thought is the weight could give a quick way to tell what the weight of paint is say one gl 10 lbs wet dry weight 7lbs after solvents evaporate.

[Guest]

Re: Really High Empty Weight?

Hi Chuck, I recall that when I did a similar experiment with a doped (not painted) wing that it only gained about 5 lbs due to the remaining solids. That was back in 1997 or 1998 I may still have the data. Will look later for it. Dave

[cvavon]

Re: Really High Empty Weight?

This could open all kinds of discussion as there are so many different kinds of paint for instance stewarts is water based and the gammit of the other are solvent based.The new hot set up is Ortex no paint needed they claim a minimum of 30 lb lighter then other systems and will soon be Certified.Take a look at the ortex site it looks neat.

[Hank Jarrett]

Re: Really High Empty Weight?

Weighing a Gallon of paint won't tell you how much you will gain. You would need to leave it open until all the solvents gassed off and even then what goes on an airplane is less since a LOT goes into the overspray.

Hank

I can tell you an HVLP sprayer uses a LOT less paint than a regular sprayer. Mine took about HALF what I was told I would need.

[N96337]

Re: Really High Empty Weight?

As usual, Hank's right on the money! You can weigh a gallon of paint and all that's going to tell you is how much the can full of paint weighs. Transfer rate of the gun/painter combination is widely varied, and solvent weight/content is also widely varied. The only way to figure it out is to weigh before and after paint. The old dope and cotton fabric jobs were really heavy sometimes, and I've seen polyurethane jobs that wound up really heavy as well. It's all variable!!
John

[Guest]

Re: Really High Empty Weight?

John, Hank,

Chuck and I were aware of the wet versus dry paint/dope issue.

I did look through my files and cannot find my old data.

I recall that a wing was 5 pounds heavier after doping through color and the total was in the 75-77lbs range.

But I can't prove it until the spring when I do another wing.

Dave