Help with building a tree sprayer

I am looking to build a sprayer that can reach up to about 35 feet into the trees to spray for bagworms. I currently have a good 8hp B&S engine, and am looking at this gun at Northern Tool to use to build a small size (30-50 gallon) tow behind sprayer.

My problem is figuring out what pump to use, and how to plumb it together. I have searched all over the net, and can find no plans or info that will help me at all. I would also like the ability to use the same sprayer with a smallish )15 foot) boom for ground spraying. I went to the farm store, and they have multiple pumps, but I have no idea how to figure what pump I need etc etc.

Does anyone know of a source for info like that? I have the capability to build this darn thing, just no knowledge!

Thanks,

Darren

The following publication from Virginia Cooperative Extension should help. Plumbing Systems for Ag Sprayers>Link

If>Link you can find the gallons per minute output for the gun at different pressure settings then you can select a pump to meet your needs. Spraying Systems Co. also has much information on sprayer systems including parts and output charts. You need to be in the 60+ psi range to get good coverage on the trees. The gun you are looking at is rated for much more pressure but that would require a very expensive pump. Unless you are spraying commercially this would be overkill.

Thanks for the link.. that has a lot of good information. I found a bunch of info on the site for Hypro Pumps, and I am now shooting for this layout:

8 hp B&S engine coupled via belt and pulleys to a 540 rpm / 580 psi diaphragm pump, using a long distance adjustable spray gun and a 55 gallon spray tank. I should be able to get 40 - 50 feet of spray distance without having to overburden the engine at all.

Now off to spend $$ :)

Thanks,

Darren