Air powered SR-71 - Page 2

mbauer · 07-27-2006, 10:57 AM

Hi Commando,

Just want to say thank you for the interest in my models! I hope you have fun experimenting with the bladders, or the CO2 cartridges!

Keep us posted with your results.

For anyone else that might be interested in the bladders, McMaster-Car "http://www.mcmaster.com" has tubing (Natural Latex Rubber Tubing), and some plastic tubing fittings that will work for nozzles (3/8"x3/8" coupler Part No. 5372k516).

I use the 1/4" ID x 3/16" Wall tubing with a Fiberglass nozzle to get the 11 oz of thrust for F104 and SR71.

For the fiberglass tube to make the extended nozzles, use fiberglass pushrod tubes made by Dave Brown Part No. PRDS-5400. These probably are in the LHS on a shelf or hanging on a peg.

The reason the above nozzle material is used, is because they will fit onto a can of computer keyboard cleaning/dusting air. Once the can empties, I cut the plastic assembley up and use the part as an adapter. Slide a basketball/football fill needle inside of it (Cut about 3/8" off of the needle end first) and use Gorrila Glue to glue them solid to make an adapter for bicycle pumps.

You can use any size/type of nozzle that you can get compressed air into the bladder with. I'm experimenting right now with a few different sized nozzles (1/4" I.D. to 1/2" I.D.). It takes 18#psi to expand the bladder on the thicker walled ones. I'm hoping 2-3 lbs of this will be available for thrust with bigger nozzles!

Anybody know of a good wind tunnel for sale? The small classroom size.

Best regards,
Mike Bauer

Best regards,
Mike Bauer

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Rod Powered Antique Oil Field	Fred_M	Scratchin' & Bashin'	32	01-20-2004 10:30 AM
New jet-powered locomotive	digital_signal_	The Real Thing- USA	15	11-03-2002 06:51 AM

07-27-2006, 10:57 AM	#16 (permalink)
mbauer Senior Member Join Date: Jan 2006 Location: Anchorage, Alaska Posts: 122	Hi Commando, Just want to say thank you for the interest in my models! I hope you have fun experimenting with the bladders, or the CO2 cartridges! Keep us posted with your results. For anyone else that might be interested in the bladders, McMaster-Car "http://www.mcmaster.com" has tubing (Natural Latex Rubber Tubing), and some plastic tubing fittings that will work for nozzles (3/8"x3/8" coupler Part No. 5372k516). I use the 1/4" ID x 3/16" Wall tubing with a Fiberglass nozzle to get the 11 oz of thrust for F104 and SR71. For the fiberglass tube to make the extended nozzles, use fiberglass pushrod tubes made by Dave Brown Part No. PRDS-5400. These probably are in the LHS on a shelf or hanging on a peg. The reason the above nozzle material is used, is because they will fit onto a can of computer keyboard cleaning/dusting air. Once the can empties, I cut the plastic assembley up and use the part as an adapter. Slide a basketball/football fill needle inside of it (Cut about 3/8" off of the needle end first) and use Gorrila Glue to glue them solid to make an adapter for bicycle pumps. You can use any size/type of nozzle that you can get compressed air into the bladder with. I'm experimenting right now with a few different sized nozzles (1/4" I.D. to 1/2" I.D.). It takes 18#psi to expand the bladder on the thicker walled ones. I'm hoping 2-3 lbs of this will be available for thrust with bigger nozzles! Anybody know of a good wind tunnel for sale? The small classroom size. Best regards, Mike Bauer Best regards, Mike Bauer