Search found 31 matches

by roland2001
Mon Feb 26, 2024 11:58 pm
Forum: Ramjet forum
Topic: Ryan's Marquardt Firebrand drone
Replies: 1
Views: 602

Ryan's Marquardt Firebrand drone

No, not a German Focke-Wulf Ta 283, but the Ryan Aeronautical Firebrand ramjet powered drone.
There is some film on YouTube re the development.
Literature search says Marquardt was largely responsible for the ramjet engines mounted on the ends/tips of the horizontal stabilizer.
by roland2001
Mon Feb 26, 2024 11:00 pm
Forum: Pressure jet forum
Topic: Ryan Aeronautical Gluhareff drone
Replies: 0
Views: 565

Ryan Aeronautical Gluhareff drone

I don't know where I found this, but I guess Ryan was happy enough with the thrust from the Gluie 130 that they used one/them as (a) sustainer(s) for their drone aircraft.
Note the intake scoop below the fuselage.
by roland2001
Mon Feb 26, 2024 4:22 am
Forum: Pressure jet forum
Topic: Building a Stram axial pressure jet engine
Replies: 2
Views: 346

Re: Building a Stram axial pressure jet engine

Flameholder for the Stram type engine.
by roland2001
Sat Feb 24, 2024 5:03 am
Forum: Pressure jet forum
Topic: Building a Stram axial pressure jet engine
Replies: 2
Views: 346

Re: Building a Stram axial pressure jet engine

OK here is the 1/4 scale sketch of what might be considered the Stram configuration
by roland2001
Sat Feb 24, 2024 4:47 am
Forum: Pressure jet forum
Topic: Building a Stram axial pressure jet engine
Replies: 2
Views: 346

Building a Stram axial pressure jet engine

Without going into a great deal of commentary I'm posting the 1/4 scale sketch of what I came up with. The total combustion volume, jetting, nozzle, number of coils all remain unchanged. What is different: The combustion chamber is ~ 5/8" longer. This change has been made because it is assumed there...
by roland2001
Fri Feb 23, 2024 3:58 am
Forum: Pressure jet forum
Topic: Plans for my axial Gluie 130R engine
Replies: 2
Views: 735

Re: Plans for my axial Gluie 130R engine

Addendum to the above: To start with I'd use a #54 0.055" drill bit for the metering jet...and a #32 0.116" drill bit for the hot nozzle. This works out well because upsizing the jet and nozzle only requires upsizing to the drill bits noted above. The SFC for this engine is ~ 1lb.fuel/1lb.thrust/hr....
by roland2001
Thu Feb 22, 2024 2:51 am
Forum: Pressure jet forum
Topic: Plans for my axial Gluie 130R engine
Replies: 2
Views: 735

Plans for my axial Gluie 130R engine

<t>I finally got a chance to draw my modified version of the Gluie 130R engine and provide all the specs for a complete engine build. ***Please note that increasing the diameters of the 2nd and 1 stages of this mostly scale 130R engine has NOT resulted in complete suppression of combustion gases at ...
by roland2001
Sat Jan 20, 2024 2:15 pm
Forum: Valved pulsejet forum
Topic: Original Schmidt Tube
Replies: 11
Views: 15227

Re: Original Schmidt Tube

Screenshot_20231021-201300~2.png
Screenshot_20231021-200625~2.png
by roland2001
Thu Dec 22, 2022 7:58 am
Forum: Ramjet forum
Topic: The Great Ramjet Challenge!!!
Replies: 313
Views: 276123

Re: The Great Ramjet Challenge!!!

Michael, hoping to have something pretty cool for this page in 2023! roland2001
by roland2001
Fri Jan 07, 2022 12:38 am
Forum: Ramjet forum
Topic: Diffuser data
Replies: 2
Views: 6193

Re: Diffuser data

Doesn't apply to straight ....the added "curvatures however are "supposed to" mitigate for the flow problems.
by roland2001
Fri Jan 07, 2022 12:33 am
Forum: Ramjet forum
Topic: Formulas from the Decker paper
Replies: 3
Views: 6105

Re: Formulas from the Decker paper

You have area and diameter reversed on your spreadsheet
by roland2001
Wed Jan 05, 2022 4:53 am
Forum: Valveless pulsejet forum
Topic: LOCKWOOD HILLER TIPJET?
Replies: 1
Views: 1526

LOCKWOOD HILLER TIPJET?

Never would have thought that someone would try this. Hats off to the creative mind! To consider for a moment that these U-shaped babies would be used for rotary aircraft "tipjets," well to quote Vizzini ," is inconceivable!" Looked through this entire section and couldn't see that anyone had posted...
by roland2001
Sun May 31, 2020 1:39 am
Forum: Pressure jet forum
Topic: Axial (inline Gluey pressure jet engine)
Replies: 3
Views: 7029

Axial (inline Gluey pressure jet engine)

https://youtu.be/m65aLgQrwXA Test table started to move with the thrust augmenter attached Roland2001
by roland2001
Wed Sep 26, 2018 3:03 am
Forum: Pressure jet forum
Topic: Fixing the 130R
Replies: 1
Views: 6280

Re: Fixing the 130R

re the theory about the changes to the intake: 1) first, re the lengths....the fundamental wave created by the 2nd stage intake tube (the longest) is reflected back from the far wall of the combustion chamber "CC" and is the inverse (opposite) of the incoming wave. This situation sets up the appropr...
by roland2001
Sat Sep 22, 2018 6:26 pm
Forum: Pressure jet forum
Topic: Fixing the 130R
Replies: 1
Views: 6280

Fixing the 130R

Gluefixes.jpg Without going into allot of theory these are the charges I recommend: 1) Diameters of the "intake" tubes: starting with the second tube/intake: increase the INSIDE diameter to 3.5625" (3 and 9/16".) Decrease the minimum diameter INSIDE to 4.09375" (4 and 3/32"). or 4.0625" (4 and 1/16...