Search found 539 matches

by skyfrog
Wed Mar 05, 2008 11:50 am
Forum: Gas turbine forum
Topic: H150A turbojet test run
Replies: 1
Views: 1665

H150A turbojet test run

Hi,

Tought you guys might be interested, as our H150A (formerly X150) turbojet engine is finally put to test. Here are videos uploaded on youtube :

Starter motor test
http://www.youtube.com/watch?v=squdF5l5p4o

Propane Ignition test
http://www.youtube.com/watch?v=O-niRYb1tDo
by skyfrog
Thu Mar 08, 2007 9:11 am
Forum: Gas turbine forum
Topic: Jetbeetle X-150 nearing completion!
Replies: 10
Views: 7427

CRS program - new user interface is done.

Hi All, The new user interface for our CRS program is done ! 1. It is based on Windows so is very user friendly. 2. It has a convenient file i/o utility so you could store the analysis cases for later run. Some sample input files are included in the installation file (zip file actually :-) unzip and...
by skyfrog
Mon Mar 05, 2007 5:22 am
Forum: Gas turbine forum
Topic: KJ-66 model build project
Replies: 42
Views: 31526

oh my

That's well above amatuer level, my opinion that's very professional piece of work, Rossco !

Well done and congratulation for such good job.
by skyfrog
Sat Feb 24, 2007 8:57 pm
Forum: Gas turbine forum
Topic: WASP test run
Replies: 0
Views: 2195

WASP test run

Hi all, After spending almost a year experimenting on the new tooling method for making WASP turbine wheel, experienced 7 design changes, now we finally got the new wasp wheel running nicely ! Here's a video clip of wasp, recording a test run that was done a year ago. Powered by the old turbine whee...
by skyfrog
Sun Feb 11, 2007 2:00 pm
Forum: Gas turbine forum
Topic: Mw54
Replies: 3
Views: 2985

Mw54

Hi,

I have some used small compressors, some of them are suitable for building Mw54, I can offer you one in the shipping parcel, free of charge.
by skyfrog
Thu Feb 08, 2007 5:02 pm
Forum: Gas turbine forum
Topic: Mw54
Replies: 3
Views: 2985

Re : MW54

Hi I have turbine wheels and NGVs 100% compatible for building MW54, in fact they are improved version of Mw54.

My products are listed on USA eBay, please search on eBay using these keywords "55mm turbine wheel" and you'll find me.
by skyfrog
Sun Feb 04, 2007 2:16 pm
Forum: Off topic forum
Topic: GLC & Luc & Viv vanished?
Replies: 5
Views: 2134

survival is uneasy

Global temperature is warming up, yet the jet engine business is cooling down. Survival is uneasy, but will survive !
by skyfrog
Fri Feb 02, 2007 3:40 pm
Forum: Gas turbine forum
Topic: an introduction
Replies: 10
Views: 4712

Re: Lincoln

last i heard from Phill the other day he said his wife Anna was taking him on holiday....women eh! heh heh. Phill asked me if there was some industrial units up near me and i looked around and found some, the rental price is so much cheaper here in Lincolnshire so i guess that was one of the factor...
by skyfrog
Thu Feb 01, 2007 2:21 pm
Forum: Gas turbine forum
Topic: an introduction
Replies: 10
Views: 4712

Re: Lincoln

Lincoln is exactly 100miles north of Duxford air museum if that gives you any idea of distance. basically go north on the A1 and you'll see signs for Lincoln when you reach Newark. Phill's new workshop is in a small village called Metheringham, he's got an excellent workshop with loads of space plu...
by skyfrog
Thu Feb 01, 2007 2:00 am
Forum: Gas turbine forum
Topic: an introduction
Replies: 10
Views: 4712

Lincoln

Hi Paul,

I know you, I've been to your old website.

One question please, I have no idea of where Lincoln is located, How far away is Lincoln from Cambridge ? I might visit Phill Heward, for some business talks.
by skyfrog
Tue Jan 23, 2007 12:28 pm
Forum: Gas turbine forum
Topic: Jetbeetle X-150 nearing completion!
Replies: 10
Views: 7427

KJ66 shaft analyzed

I got critical rotational speed for KJ66 shaft. My program shows 127k rpm and the max rpm set was 117k rpm, quite reasonable right ?
by skyfrog
Mon Jan 22, 2007 9:27 am
Forum: Rocket forum
Topic: A working rocket
Replies: 9
Views: 5731

Re: re: A working rocket

Quick question, why are they ejected/mortar'd before the main rocket is fired? Because if it launches under full rocket power it chars the crew standing by. There are ways round this such as having the launcher and controller separated but accuracy goes down as the guidance has to compensate for a ...
by skyfrog
Sun Jan 21, 2007 1:11 pm
Forum: Gas turbine forum
Topic: Jetbeetle X-150 nearing completion!
Replies: 10
Views: 7427

Re: Analysing critical rotational speed of shafts

Fricke wrote: Hi Horace!

Is the results correct?

You have 136k RPM for a, 12,5k RPM for b and 10,5k RPM for c!
Oops, typo I've corrected, sorry for that.
by skyfrog
Sun Jan 21, 2007 12:13 pm
Forum: Gas turbine forum
Topic: Jetbeetle X-150 nearing completion!
Replies: 10
Views: 7427

Analysing critical rotational speed of shafts

Case 1. Kamps shaft (illustrated in book Model jet engines 2nd edition, page 66) D1 = 0.007 (m), diamter of shaft segment 1 D2 = 0.014 (m), diamter of shaft segment 2 D3 = 0.007 (m), diamter of shaft segment 3 L1 = 0.016 (m), length of shaft segment 1 (bearing to c.g. of compressor) L2 = 0.096 (m), ...
by skyfrog
Fri Jan 19, 2007 4:08 pm
Forum: Gas turbine forum
Topic: Jetbeetle X-150 nearing completion!
Replies: 10
Views: 7427

critical rotational speed (CRS) program

Hi John, thanks for your support too. I have developed a finite element method based program called CRS (critical rotational speed), for analysing the natural frequencies of micro gas turbine's shaft. I am comparing the program output using benchmarks such as P66 in Kamps' book, and it shows consist...