Search found 22 matches

by airrocket
Sat Jan 09, 2010 5:30 am
Forum: Ramjet forum
Topic: Ducted Ramjet that is meant to fly.
Replies: 35
Views: 24689

Re: Ducted Ramjet that is meant to fly.

special epoxy...what type of epoxy?
by airrocket
Thu Oct 09, 2008 12:41 am
Forum: Ramjet forum
Topic: Flight SFRJ Paraffin Development
Replies: 9
Views: 4469

Re: Flight SFRJ Paraffin Development

CP/CG is overly stable still (tube fin effect helps)flies great straight as an arrow. Just don't try it with low thrust ejector motor.
Better sober up before ya build...these things can hurt ya!
by airrocket
Wed Oct 08, 2008 3:40 pm
Forum: Ramjet forum
Topic: Flight SFRJ Paraffin Development
Replies: 9
Views: 4469

Re: Flight SFRJ Paraffin Development

Ready for early ejector only flight test.
Aries-1Test 004.JPG
Graphite nozzle, ejector ignitor leads
Aries-1Test 006.JPG
Spike intake cowl
Aries-1Test 007.JPG
Arse nozzle, ejector, view
Aries-1Test 009.JPG
Aries preped and ready to fly
by airrocket
Wed Sep 24, 2008 4:35 am
Forum: Ramjet forum
Topic: Flight SFRJ Paraffin Development
Replies: 9
Views: 4469

Re: Flight SFRJ Paraffin Development

Just received my nozzles today. Busy tomorrow will post pics Thursday/Friday. Nozzles are thin - graphite CNC turned from my CAD files. I'll be coating the tube ID with ceramic paint and gluing nozzles in with ceramic glue Thurs and Friday. Static test first flight (ejector test) this weekend. Dual ...
by airrocket
Sat Sep 20, 2008 1:42 pm
Forum: Ramjet forum
Topic: Flight SFRJ Paraffin Development
Replies: 9
Views: 4469

Re: Flight SFRJ Paraffin Development

Thanks James, :oops:

Sorry about that. :)
by airrocket
Sat Sep 20, 2008 1:23 pm
Forum: Ramjet forum
Topic: Flight SFRJ Paraffin Development
Replies: 9
Views: 4469

Re: Flight SFRJ Paraffin Development

Thanks Jerry, Impressive air-breathing projects going on down under. Been following University of Queensland projects for years. What a coincidence you should mention sorbitol. I've been cooking with it lately....sorbitol, paraffin, carbon black. Hope to light my candles next year. I plan to post a ...
by airrocket
Sat Sep 20, 2008 1:07 am
Forum: Ramjet forum
Topic: Flight SFRJ Paraffin Development
Replies: 9
Views: 4469

Flight SFRJ Paraffin Development

Starting small with ducted rocket testing ejector augmentation. Waiting to install graphite nozzle.
ARIES 1.jpg
CAD
Aries1 Spike Recovery Bay.JPG
Parachute recovery bay
Aries1 Nozzle End (no nozzle yet).JPG
Waiting to install graphite nozzle
by airrocket
Sat Sep 13, 2008 11:29 pm
Forum: Ramjet forum
Topic: Ducted Ramjet that is meant to fly.
Replies: 35
Views: 24689

Re: Ducted Ramjet that is meant to fly.

Fill it with a water based saline solution allowing for evaporation cooling through small holes in the inlet spike. Providing it is hollow or drilled out interior.
by airrocket
Wed Sep 10, 2008 11:29 pm
Forum: Ramjet forum
Topic: WII German Pabst ramjets Information
Replies: 1
Views: 2834

WII German Pabst ramjets Information

Searching for information on German Pabst ramjets used on Focke-Wulf Ta283. These would have been subsonic.
by airrocket
Wed Sep 03, 2008 3:51 am
Forum: Ramjet forum
Topic: Bomarc ramjet replica going on a rocket
Replies: 5
Views: 3672

Re: Bomarc ramjet replica going on a rocket

James,

Please keep me informed on progress. I'm very interested in seeing how this project develops and flies.

Doug
by airrocket
Mon Sep 01, 2008 9:01 pm
Forum: Ramjet forum
Topic: Bomarc ramjet replica going on a rocket
Replies: 5
Views: 3672

Re: Bomarc ramjet replica going on a rocket

SCRAM tech would be well beyond hobbyist capability. Ramjet is alone challenging at mach plus velocities. One would need to obtain a velocity great enough to carry model into space after engine burnout. Altitude depends on burn time and velocity obtained during that burn time. For a ramjet flying a ...
by airrocket
Mon Sep 01, 2008 6:05 pm
Forum: Ramjet forum
Topic: Bomarc ramjet replica going on a rocket
Replies: 5
Views: 3672

Re: Bomarc ramjet replica going on a rocket

Sounds awesome would like to see some pics? Unable to access video, So what size is this ramjet diameter? Have you flown it yet?
by airrocket
Wed Apr 02, 2008 5:09 am
Forum: Ramjet forum
Topic: Basic Diffuser Design Assistance
Replies: 1
Views: 2643

Basic Diffuser Design Assistance

Are there some basic KISS ratios, calculations, or formula's to aid in estimating the relationship between diffuser expansion (inlet to outlet CS area ratio) and degree, percent or ratio of pressure (density) rise, temp rise, velocity decrease, across the diffuser section? I've searched the internet...
by airrocket
Sat Mar 29, 2008 3:43 pm
Forum: Ramjet forum
Topic: ramjet vehicle performance estimation tool
Replies: 17
Views: 12173

Thanks for the advice and information. I will play around with it and see what develops.
by airrocket
Sat Mar 29, 2008 12:56 pm
Forum: Ramjet forum
Topic: Ducted Ejector Ram Rocket Solid Fuel
Replies: 7
Views: 6710

Decided to eat this elephant one bite at a time. First project will be an air augmented rocket utilizing fanno flow (flow through a constant duct). Similar to the old Estes Augie II only scaled up and tweak some. The larger diameter duct tube will be longer with only a few inches of a conical cone c...