|
|
Post by andym on Mar 2, 2023 4:58:43 GMT -5
Hello Andy Thank you VERY much, i finally was able to download this program to my PC Interesting thing to play with ,seem VERY Difficult to reach my goal with this engine build which was to give 50+ kg in thrust.. it just about touched 50kgs at around 650 degrees Celsius. Buggerbugger!!! Hi, thanks  happy to help.... its on a few sites, but not easy to find....thank you for kind words on my projet.... hoping to get video done soon, well when weather warms up... my hands dont work so good in the cold these days..... heating the shed with the electric fan...  but again thank you.... good news is. cnc machine should be free next week .... |
|
|
|
Post by stoffe64 on Mar 8, 2023 6:23:11 GMT -5
YES,electricity,a page for itself these days...a real disgrace i Think!
Anyway it was a huge happiness to get That jetspecs downloaded.
Been looking at that now,my estimated thrust numbers for this engine is around 50kgish....I thought it would be a bit higher
|
|
|
|
Post by racket on Mar 8, 2023 15:57:29 GMT -5
Hi Stephan
LOL ..........we all wish it was a bit bigger , Jetspecs assumes modest temps and pressures , if you wish to "extend the envelope " the thrust will improve .
Cheers
John
|
|
|
|
Post by stoffe64 on Mar 8, 2023 17:19:02 GMT -5
Hi Stephan LOL ..........we all wish it was a bit bigger , Jetspecs assumes modest temps and pressures , if you wish to "extend the envelope " the thrust will improve . Cheers John Yeahh,i understand that if i push it ,it also get more thrust, but how high temp can i go in egt? 750 degrees Celsius? How high boost can i get out of this one? Apparently this turbo has a non superback compressor wheel=non high boost but it has a cast iron compressor housing Interesting! |
|
|
|
Post by racket on Mar 8, 2023 18:40:55 GMT -5
Yep , without superback you'll need to keep below 3:1 PR
750C should be OK for a TOT at 3:1
|
|
|
|
Post by stoffe64 on Mar 9, 2023 2:22:33 GMT -5
Yep , without superback you'll need to keep below 3:1 PR 750C should be OK for a TOT at 3:1 At what speed would that be? Around 70000ish or so? |
|
|
|
Post by racket on Mar 9, 2023 3:08:37 GMT -5
Probably 60,000 or a bit less
|
|
|
|
Post by stoffe64 on Mar 9, 2023 6:19:49 GMT -5
Probably 60,000 or a bit less Now i understand why it has such big turbine housing of 41cm because of the low boost,i wonder why the use of a cast iron compressor housing then..hmm Interesting this!! |
|
|
|
Post by racket on Mar 9, 2023 16:50:21 GMT -5
Industrial turbos often have cast iron housings , weight isn't an issue .
Also without a superback there more of a chance the comp would fail and require containment
|
|
|
|
Post by stoffe64 on Mar 10, 2023 3:13:06 GMT -5
Industrial turbos often have cast iron housings , weight isn't an issue . Also without a superback there more of a chance the comp would fail and require containment Ohhh,great....I purchased a piece of junk Ahh well i have what i have...never going to be a world record engine anyway! Just to build a turbojet engine out of a turbo just because it is possible and fun,then i also guess it is BEST NOT to build a afterburner for it....to NOT stress the engine with that extra load? |
|
|
|
Post by racket on Mar 10, 2023 3:26:00 GMT -5
The afterburner doesn't/shouldn't add any extra load than a normal jet nozzle
You're looking at mass flow not pressure with your engine , but it'll still produce some decent thrust :-)
|
|
|
|
Post by stoffe64 on Mar 10, 2023 4:13:03 GMT -5
The afterburner doesn't/shouldn't add any extra load than a normal jet nozzle You're looking at mass flow not pressure with your engine , but it'll still produce some decent thrust :-) Yeahh,it is THAT i am hoping for, ill be VERY happy to reach 50kg in thrust AND then maybe to put on a afterburner....to maybe reach 75kg thrust? I also found a brand New replacement compressor wheel on ebay 100mm inducer/152mm exducer non superback Together with a overhaul kit. |
|
|
|
Post by turbinenjoe on Mar 10, 2023 11:52:24 GMT -5
Hi,
there are billet superback wheels (100/152.04mm) 8+8 on ebay for ~ 300€.
I know it is a lot of money and it has to be checked if they fit first.
Regards.
Matthias
|
|
|
|
Post by stoffe64 on Mar 10, 2023 15:49:39 GMT -5
Hi, there are billet superback wheels (100/152.04mm) 8+8 on ebay for ~ 300€. I know it is a lot of money and it has to be checked if they fit first. Regards. Matthias Hello Mathias, thank you for the tip but superback wheel dont fit my turbo because it is Another turbine shaft(which is a bit longer),oil slinger and compressor back plate but i have a brand new wheel coming in the mail so it Will have a better chance surviving as a turbojet |
|
|
|
Post by stoffe64 on Mar 19, 2023 6:20:35 GMT -5
 This is the data i got when i entered my HX82 wheel sizes etc,how do i know that it is 3:1 pressure ratio?...That is obviously my limit for this engine |
|
