Search found 503 matches

by racketmotorman
Wed Feb 29, 2012 8:22 am
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 49687

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

Hi

Nice job guys .................thats one sweet machine :-)

Thanks for the english subtitles .

Cheers
John
by racketmotorman
Wed Jan 25, 2012 10:10 pm
Forum: Gas turbine forum
Topic: TV94 TurboFan Build
Replies: 59
Views: 73980

Re: TV94 TurboFan Build

Hi Ash

Good to see the dream is still alive :-)

Cheers
John
by racketmotorman
Mon Dec 19, 2011 8:52 pm
Forum: Gas turbine forum
Topic: gas turbine as heater system for a hall
Replies: 7
Views: 5220

Re: gas turbine as heater system for a hall

Hi The inducer is that part of the compressor wheel where the air goes in , the exducer is where the air exits the comp wheel . A 2" INducer according to Jetspecs will produce an engine giving a bit over 20 lbs of thrust ...............................I helped in the construction of Jetspecs, its no...
by racketmotorman
Sun Dec 18, 2011 9:27 pm
Forum: Gas turbine forum
Topic: gas turbine as heater system for a hall
Replies: 7
Views: 5220

Re: gas turbine as heater system for a hall

Hi I'd be looking at using something with a 2"-50mm inducer rather than the smaller size , this will allow some buffer for HX losses etc etc .... you'll also be able to use one of the cheaper turbos off Ebay that don't cope well with high rpm/pressure ratios or temperatures, but will/should be OK if...
by racketmotorman
Sat Dec 17, 2011 8:20 am
Forum: Gas turbine forum
Topic: gas turbine as heater system for a hall
Replies: 7
Views: 5220

Re: gas turbine as heater system for a hall

Hi Yeh , you need to run a TOT of ~400 deg C just to get the engine to operate , that requires an fuel/air ratio of ~0.01 :1 ( 100 :1 A/F) , you're looking at a fuel burn rate of 6 LPH or 10.5 lbs/hr , allowing for less than perfect combustion you'll need ~1,000 lbs of air per hour or ~16 lbs/min , ...
by racketmotorman
Sat Dec 17, 2011 4:30 am
Forum: Gas turbine forum
Topic: gas turbine as heater system for a hall
Replies: 7
Views: 5220

Re: gas turbine as heater system for a hall

Hi

You'll need a turbo with a 1.5 - 2 inch diameter compressor inducer

Cheers
John
by racketmotorman
Sat Dec 10, 2011 10:11 pm
Forum: Gas turbine forum
Topic: Oil Pump Help Needed!
Replies: 4
Views: 3815

Re: Oil Pump Help Needed!

Hi Don't get the cheaper one , its seals will be affected by the lube , its designed for "water" , get the one with buna seals , that is a reasonable price . Relief valves are generally a spring over a moving "plug" that uncovers the dump/drain when pressure exceeds the setting http://www.pyronics.c...
by racketmotorman
Fri Dec 09, 2011 11:03 pm
Forum: Gas turbine forum
Topic: Oil Pump Help Needed!
Replies: 4
Views: 3815

Re: Oil Pump Help Needed!

Hi Shurflo pump , Model 8000- 643-236 with buna seals , you will need to have some sort of pressure relief valve to vent excess flow back to the oil tank unless you incorperate some sort of accumulator in the lube system so that the inbuilt electrical pressure switch can be used .......................
by racketmotorman
Wed Dec 07, 2011 10:17 pm
Forum: Gas turbine forum
Topic: Been a while - new project, T04 Gas Turbine.
Replies: 215
Views: 156683

Re: Been a while - new project, T04 Gas Turbine.

Hi Mike

Some good build Threads in the DIY Section http://jetandturbineowners.proboards.co ... diygeneral ;-)

Cheers
John
by racketmotorman
Sun Dec 04, 2011 8:44 pm
Forum: Gas turbine forum
Topic: Been a while - new project, T04 Gas Turbine.
Replies: 215
Views: 156683

Re: Been a while - new project, T04 Gas Turbine.

Hi Mike

http://jetandturbineowners.proboards.com/ ....................worth a look :-)

Cheers
John
by racketmotorman
Wed Nov 30, 2011 4:12 am
Forum: Gas turbine forum
Topic: Been a while - new project, T04 Gas Turbine.
Replies: 215
Views: 156683

Re: Been a while - new project, T04 Gas Turbine.

Hi Ash

Thats great news on the TV94 turboshaft build :-)

I noticed recently that you've been on JATO Site , good one , theres some nice build Threads ;-)

Cheers
John
by racketmotorman
Mon Nov 14, 2011 3:26 am
Forum: Gas turbine forum
Topic: Turbo jet plans
Replies: 17
Views: 12362

Re: Turbo jet plans

Hi Mike

Yeh , we need to do a bit of maths in the beginning to see if we're in the ballpark with a design and don't have a major mismatch of components, thankfully theres now plenty of info available to do that :-)

Cheers
John
by racketmotorman
Sun Nov 13, 2011 10:37 pm
Forum: Gas turbine forum
Topic: Turbo jet plans
Replies: 17
Views: 12362

Re: Turbo jet plans

Hi Our DIY engines make acceptable thrust , the one in my bike video produced ~110 lbs of thrust as a pure jet , but with a freepower turbine downstream , I used a third stage Allison C20 heli engine turbine wheel , produced 115 rear wheel horsepower on the dyno . http://www.youtube.com/watch?v=Cpln...
by racketmotorman
Sat Nov 12, 2011 9:35 pm
Forum: Gas turbine forum
Topic: Turbo jet plans
Replies: 17
Views: 12362

Re: Turbo jet plans

Hi Heres a Link to my bikes construction http://www.ivcity.com/john/index.html , when a freepower turbine is used downstream of the gas producer there isn't a need for a clutch and/or multi speed gearbox as the freepower wheel acts as a torque convertor with gases as the driving "fluid" . Thread bui...
by racketmotorman
Sat Nov 12, 2011 1:03 am
Forum: Gas turbine forum
Topic: Turbo jet plans
Replies: 17
Views: 12362

Re: Turbo jet plans

Hi Heres Links to some of my creations http://www.youtube.com/watch?v=q_MRUxWEOZ0 http://www.youtube.com/watch?v=F-fci_AlNMU http://www.youtube.com/watch?v=VX5U8DlBzzk http://www.youtube.com/watch?v=8Y8jpaDTkEY http://www.youtube.com/watch?v=NR0rsTbkOS4 http://www.youtube.com/watch?v=WfWztBRW8W4 If ...