开云体育

They probably already think so hi.

I know they do...hahaha.
I have older photos of some experimental LARGE home made balloons that grabbed a lot of attention more than once.
The site stinks,but free and the list of designs are on the left of this page.Some the size of small automobiles :)
Again,this site is a pain but the best for free.

Lots of laughs.

Yes wax is water repellent but not super repellent (the??of a water droplet exceed 150°) for Carnuba wax 107-123°, plastics around 90°.

I would think a wax coating is heavier.

Jan

Wow...that website sucks....sorry for posting that.Even I can not see much there anymore.

Well I could see your big balloons (hope they didn't scare the horses). Did you have much problem with leakage?

Saw this on wikipedia:?

It has been also suggested that the superhydrophobic surfaces can also repel ice or prevent ice accumulation leading to the phenomenon of?. However, not every superhydrophobic surface is icephobic??and the approach is still under development??In particular, the frost formation over the entire surface is inevitable as a result of undesired inter-droplet freezing wave propagation initiated by the sample edges. Moreover, the frost formation directly results in an increased frost adhesion.

Jan

The horses appeared to be interested and always come close to watch.
Have to look into these coatings.I think the best thing to do is run a test using actual balloons and a garden hose.My only concern would be reaction to balloon film using any product.A real time test would do the trick then look over the materials over time.Maybe even put high pressure into to them to see if they still have the strength to hold gas.
Even with water repellent balloons,the payloads themselves would need to be able to NOT act as a sponge of hold water on the surfaces.
Moisture on the brittle solar cells then freezing could create cracks...end of flight in itself.
If not for solar cells needing to be flat,a ball shape container would be best rather than rectangular.I see these styro balls in local craft supply stores but mounting solar cells may be tricky.Maybe they would need to be mounted like a satellite.
This is what makes the hobby fun,trying new ideas.

I checked with a chemist and physicist I know, he said you would have to test what treatment works (he did not have a formula for the chemicals used in the treatment). The Mylar is already hydrophobic (not super hydrophobic). The physicist in him asked why not use a bigger balloon (I said too expensive).

Jan?

On Tue, Sep 19, 2017 at 12:54 pm, SM7ETW Jan wrote:

The physicist in him asked why not use a bigger balloon (I said too expensive).

You got that right.
But sort of takes the fun out as well.
Check your wallets -

Been searching where to get this particular film.Either they will not sell it to the general public or out of country sales.
Anyone know much about this film?

I just know it is the best stuff to use.

Can't you register a private company NXZ balloon company.
Or find a ham employe.

How do you get the joints gas tight?

The film company said they can not sell to anyone in the USA for security reasons.
Strange,but that is what the guy told me at the USA branch.The company name is VECTOR packaging.
Sealing the film can be done more than one way.Hand sealing using adjustable temperature iron or impulse sealing which would be ideal.
Have a few home brew concepts floating around here.
One is a 36" circular heat element in my garage yet to be modified.