Wind Tunnel Fabrication (Part 3)

OK, just to rough-in the numbers....

5280ft = 1 mile

60 mph = 1 mile per minute

....so roughly for each square foot of your moving column of air you need to move 5280 cubic feet per minute.

A circle between 7 and 8 ft in diameter could be 50 square feet. 264000 cfm for in mph and about about 430k cfm for 100mph and 50 square feet of coullumn.

on my phone, and in my head, but i think it is all square.

Benbenben

!!!

I can hardly believe I forgot my original intent of mentioning SKYVENTURE wind tunnels to you. I have spent a good amount of time in the Orlando tunnel (130 ~ 175 MPH). It is one of the best things to do in Orlando, (and reasonably priced).

Anyway, Skyventure lists on their corporate website the power plants and 'average KW use' for various wind tunnels ranging from 10ft dia. to 16.4ft dia.

SkyVenture designs, builds and operates Vertical Wind Tunnels in the United States and around the world. We currently offer 8 different models ranging in size from 10 to 16 feet in flight chamber diameter and in speed from 130 to 175+ mph. Our product line follows:

0.746 KW = 1 HP so.. 299KW = 400HP (10ft) ...... up to 604KW = 810HP (16.4ft)

Benbenben

p.s. so classically me to initially do the figures correctly in my head (comment #1), then misinterperet a comment (comment#2) as showing I miscalculated, then erroneously 'correct' my original (comment #3).... only to later be shown (comment #5 i think) .. and feel the need to confess the whole ordeal.... this comment.

Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure, or nothing. - Helen Keller

Ben...,

Do you sell just the fan blades and if so how much?

do you want to talk privatly? if so send me a message thru my CR4 membership.

Spacecannon

Spacecannon

I do not sell fan blades (I sell money or buy debt...well, lease it actually).

I have been in the Skyventures wind tunnel in Orlando, and thought the site might be useful to you.

Check out some of the patents (on google patent) in the field of recirculating wind tunnels for ideas on attaining your wind tunnel goals with the least HP....

Benbenben

Ben...,

Do you do IPOs? Angel financing? or anything related to financing ideas?

Spacecannon

He looks right to me. I think you used diameter instead of radius.

100mph → 147fps

A = 3.5²Π=38sf

Volume Required = 147(38)60=335160CFM

You are right....I goofed on the square footage of a 7 to 8 foot diameter.... I should have said it could be 40 square feet..... Which whould bring calculations in line with yours......

The dangers of email via phone and no scratch pad....

Benbenben

Passing..., you are right, I used Dia. instead of Rad., thx for helping me catch this error.

Thx to everyone. subject concluded.

Spacecannon

8 ft dia circle ~ 50 sq ft.

100 mph = 8800 fpm

8800 X 50 = 440,000 cfm

Seven foot wind tunnel? That's huge! Find somebody who already has one, NASA has one at Langley AFB near Yorktown Va. Maybe some college may have one. Villanova U. in Pa. has one, but it's only about a meter square, cost a pretty penny. Can't you do with a smaller one and model your project? A good wind tunnel has a lot of expensive sensor stuff, too. And it has to be calibrated for the results to be accepted.

Aw, shucks, you're at the Mohave Desert. Get a Porsche and a strain gauge. After the test you'll still have a Porsche. Cost will be the same. Accept no substitute.

Mike K thx for the suggestions, Been through this before see part 1 and 2, Every wind tunnel Ive priced is at least $800-$1,000/hr, and I need a big one for modeling Blimps, and wind turbines,...model need to be 2'h x 3'w x 9'L scaling problem with size, much smaller and I start to loose continuit of the relationship, (I'm told by experts).

I see your Avatar, is a LTA ship, any knoledg of the subject?

My avatar is the ZMC-2 metalclad. It flew sucessfully for a dozen years, way back in the Hindenburg days. A group and I are working on a new ship, it's a real fun challenge. I want to use petg-uv plastic, want the ship to be tough as nails. We haven't decided on shape or construction yet. I'm hoping to make a 1:10 model to test my ideas. If nothing else, it will make a cool rc model.

Ok, mike, we should talk privatley. I'll email you with my email. spacecannon