Search found 503 matches

by racketmotorman
Wed Mar 19, 2014 9:14 pm
Forum: Gas turbine forum
Topic: Jet Snowmobile Project/Team
Replies: 35
Views: 10718

Re: Jet Snowmobile Project/Team

Hi Luc LOL., ...........I must have written "the book" a hundred times with the thousands of replies I've contributed to http://groups.yahoo.com/group/DIYGasTurbines/ .......and the http://jetandturbineowners.proboards.com/ I think the "brass vs roller" preference is like Ford vs GM preference , its...
by racketmotorman
Thu Mar 13, 2014 8:39 am
Forum: Unconventional, Multi-Mode and Hybrid Jets
Topic: Turbo cylinder?
Replies: 10
Views: 8755

Re: Turbo cylinder?

It won't work :-( The radial compressor wheel is a constant supply device , making it intermittent will probably send it into surge , wrecking the turbo . Also having a "perfect" air/fuel ratio for combustion to occur in the "cylinder" will produce a temperature too high for the turbine to survive. ...
by racketmotorman
Fri Mar 07, 2014 12:22 am
Forum: Gas turbine forum
Topic: Jet Snowmobile Project/Team
Replies: 35
Views: 10718

Re: Jet Snowmobile Project/Team

Hi Luc I'll have to disagree about roller bearings being better , the GT6041 is used on a lot of BIG CAT diesel engines of >2,000 hp that vibrate like hell for thousands of hours on end ................the oil damping effects increase life of a turbo , all the huge ABB ship turbos run brass bushes f...
by racketmotorman
Thu Mar 06, 2014 5:03 am
Forum: Gas turbine forum
Topic: Jet Snowmobile Project/Team
Replies: 35
Views: 10718

Re: Jet Snowmobile Project/Team

Hi Luc Theres a build Thread on JATO for my GT6041 kart that might be of interest to you ...............http://jetandturbineowners.proboards.com/thread/78/garrett-gt6041-powered-kart . One potential "problem" with GT55 range is the turbine flow , even the GT6041 has to have the larger 1.47 A/R turb ...
by racketmotorman
Wed Mar 05, 2014 9:39 pm
Forum: Gas turbine forum
Topic: Jet Snowmobile Project/Team
Replies: 35
Views: 10718

Re: Jet Snowmobile Project/Team

Hi Luc Nope , that won't work :-( By splitting the hot gases exiting the flametube into 6 parts , there won't be enough energy going to the one turbine wheel spinning its compressor wheel and attempting to supply air to the combustor , you'd need to blank off the other 5 turbine stages as well as th...
by racketmotorman
Wed Mar 05, 2014 8:27 am
Forum: Gas turbine forum
Topic: Jet Snowmobile Project/Team
Replies: 35
Views: 10718

Re: Jet Snowmobile Project/Team

Hi Luc LOL........good to see you getting back into burning kero :-) To answer your questions about Sals design ...... 1 ...........theoretically , yes. 2 ..........no , all turbos will need to be spooled up together , with only one turbo being spooled up the air from its compressor will enter the s...
by racketmotorman
Sat Jan 18, 2014 10:24 pm
Forum: Gas turbine forum
Topic: TV94 TurboFan Build
Replies: 59
Views: 73954

Re: TV94 TurboFan Build

Hi

This Thread has been continued on the JATO Site http://jetandturbineowners.proboards.co ... ft-project

Cheers
John
by racketmotorman
Sun Oct 28, 2012 4:10 am
Forum: Off topic forum
Topic: Almost forgot how fun flying was ...
Replies: 35
Views: 11150

Re: Almost forgot how fun flying was ...

Hi Luc Going good down here , hopefully my new workshop is being erected this week , and I can get back into the turbine fun again . It certainly helps to have a non threatening examiner when doing your flight test , its stressful enough without them adding an extra layer ..................heh heh ,...
by racketmotorman
Fri Oct 26, 2012 11:51 pm
Forum: Off topic forum
Topic: Almost forgot how fun flying was ...
Replies: 35
Views: 11150

Re: Almost forgot how fun flying was ...

Hi Luc

Congratulations on getting your "Wings" :-)

Cheers
John
by racketmotorman
Mon Jun 11, 2012 10:56 pm
Forum: Off topic forum
Topic: Almost forgot how fun flying was ...
Replies: 35
Views: 11150

Re: Almost forgot how fun flying was ...

Hi Luc Alls well here , just in the process of moving house , 2 weeks to go . LOL...............that first solo nav will be fun ............I can still remember mine after >30 years , fine crisp morning , not a breath of wind , engine sounding sweet and not a care in the world ...........sadly the f...
by racketmotorman
Sun Jun 10, 2012 10:52 pm
Forum: Off topic forum
Topic: Almost forgot how fun flying was ...
Replies: 35
Views: 11150

Re: Almost forgot how fun flying was ...

Hi Luc

Good to hear the flight training is going well ....................how many hours to go ??

Cheers
John
by racketmotorman
Sun Jun 10, 2012 10:38 am
Forum: Gas turbine forum
Topic: New to jet building, not new to jets. :D
Replies: 12
Views: 5142

Re: New to jet building, not new to jets. :D

Hi Brady

A 15 inch diameter swing will allow construction of 12 inch diameter cased engines without too many problems , I've even turned up the 14 inch dia wooden pattern for the front cover over a Garrett TPE 331 comp wheel thats ~10 inch diameter :-)

Cheers
John
by racketmotorman
Sun Jun 10, 2012 6:57 am
Forum: Gas turbine forum
Topic: New to jet building, not new to jets. :D
Replies: 12
Views: 5142

Re: New to jet building, not new to jets. :D

Hi Brady For turbine work we need a large diametric swing on our lathes for machining flanges etc , we don't need large centre distances , 900mm is adequate , I've found the 15 inch -375mm swing on my lathe is big enough for what I've been making Theres some very good lathes available at very reason...
by racketmotorman
Sun Jun 10, 2012 2:55 am
Forum: Gas turbine forum
Topic: New to jet building, not new to jets. :D
Replies: 12
Views: 5142

Re: New to jet building, not new to jets. :D

Hi Brady

I just sent you a PM about us Aussie builders ................all the best with your project :-)

We'll help out where we can

Cheers
John
by racketmotorman
Tue Mar 13, 2012 3:04 am
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 49676

Re: Planing for next years speed weekend, (1/2 scale Argus)

You guys have done an amazing job getting such a massive engine up and running , theres always going to be some teething problems when a new engine is first started , just so many things that can go wrong , ..................but ,the basics are now working well , she starts nicely and throttles up a...