Landracing Forum Home
November 23, 2017, 09:33:02 AM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News:
BACK TO LANDRACING.COM HOMEPAGE
 
   Home   Help Search Calendar Login Register  


(Note: Donations are not tax deductible)







Live Audio Streaming and Archives of Past Events
Next Live Event: TBD
Pages: 1 ... 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 [110] 111 112 113 114 115 116 117   Go Down
  Print  
Author Topic: APS/Ω Gas turbine bike build  (Read 395571 times)
0 Members and 1 Guest are viewing this topic.
Mobacken Racing
Sr. Member
****
Offline Offline

Age: 36
Location: Östersund - Sweden
Posts: 808


Turbine junkie


WWW

Ignore
« Reply #1635 on: April 02, 2017, 03:43:31 PM »

While waiting for some parts for the turbofan build I continue with the JU-02 project, the time has come to construct the test rig!



This time I plan to use a load cell to measure the thrust correctly, the "frame tubes" onto which the engine will be clamped have a sliding fit in the test rig so they can transfer the thrust to the load cell.



Four engine mounts have been made from stainless angle iron and nylon feets have been milled that will sit on top of the frame tubes.



Time to weld the engine mounts in place!



I didn´t weld more than needed to avoid heat distortion of the engine cover.



The finished test rig (except for the load cell) with the engine cover fitted, I am planning to mount it to the large fan I will build a motorcycle dyno bench from later. It weighs close to a ton so the engine won´t move it. Smiley



Before calling it a night I wire locked the flame tube screws, no risk that they will fall out now.



Cheers!
/Anders
Logged
Mobacken Racing
Sr. Member
****
Offline Offline

Age: 36
Location: Östersund - Sweden
Posts: 808


Turbine junkie


WWW

Ignore
« Reply #1636 on: April 04, 2017, 03:03:18 PM »

I did a test with the bike today but ran out of air in the scuba tank before I had figured out the idle throttle setting, I´ll give it another go once I have had the scuba tanks filled.



Cheers!
/Anders
Logged
Mobacken Racing
Sr. Member
****
Offline Offline

Age: 36
Location: Östersund - Sweden
Posts: 808


Turbine junkie


WWW

Ignore
« Reply #1637 on: April 09, 2017, 12:56:13 PM »

I tried the bike again today with newly filled scuba tanks, but no go. The engine won´t increase in revs when the fuel is applied, it just sends billowing flames out the exhaust pipe.

After some consideration I measured the inner diameter of the syringe injectors, both the new ones and the ones I used before. Small wonder the engine didn´t run, the new green size syringes have an inner diameter of slightly over 0.5mm while the old ones was a snug 0.4mm ID. The flow areas are 0.23mm2 compared to 0.125mm2, in other words almost twice the flow area.

Looking at some syringe charts found with Google there seems to be some kind of confusion with the color markings, for example Black can be both 0.305mm OD and 0.7mm OD depending on where on what chart you look at...



I´ve just ordered a set of 0.7mm OD Black syringes which should be of the same size as the old ones that apparently worked just fine, they choked at around 2.5bar P2 but with water injection I think I should get some decent speed out of the bike anyway. Good thing I found this out now and not a week before the One Mile race. smiley

Cheers!
/Anders
Logged
Mobacken Racing
Sr. Member
****
Offline Offline

Age: 36
Location: Östersund - Sweden
Posts: 808


Turbine junkie


WWW

Ignore
« Reply #1638 on: April 09, 2017, 03:03:16 PM »

A pic from before the test, I have some video as well but it is pretty much worthless since the bike didn´t start.



Engine removed from the bike and uncovered in 5 minutes.



15 minutes later it looked like this.



Now I just have to wait for the syringes to arrive... smiley

Cheers!
/Anders
Logged
Mobacken Racing
Sr. Member
****
Offline Offline

Age: 36
Location: Östersund - Sweden
Posts: 808


Turbine junkie


WWW

Ignore
« Reply #1639 on: April 09, 2017, 03:38:08 PM »

With JU-01 taken out of the bike chassis I had the opportunity to test fit JU-02 to see if the feet are spaced apart properly and how close to the fuel tank the oil return fitting will sit. And of course to see what it will look like. smiley

Old JU-01 engine installed:



New JU-02 test fitted, it sure fills out the chassis better.



Oh yes. smiley



Other side:



To sum this up I can´t wait until I can install JU-02 in the bike and feel what 250+ gas turbine horses feels like! cool

Cheers!
/Anders
Logged
Peter Jack
Hero Member
*****
Offline Offline

Age: 74
Location: Calgary, Alberta
Posts: 3444





Ignore
« Reply #1640 on: April 09, 2017, 05:26:48 PM »

Awesome Anders!!!  cheers cheers cheers

Pete
Logged
grumm441
Hero Member
*****
Offline Offline

Location: Wazavudu Bellytank Spirit of Sunshine Bellytank
Posts: 1401

HK 327




Ignore
« Reply #1641 on: April 10, 2017, 04:18:42 AM »

Nice
It almost looks like there's room for both of them
G
Logged

Chief Motorcycle Steward Dry Lakes Racers Australia Inc
Now with stars
I build it, Goggles tries his hardest to break it
krusty
Full Member
***
Offline Offline

Posts: 245





Ignore
« Reply #1642 on: April 10, 2017, 05:30:54 AM »

Don't go giving him ideas, Grumm!  grin

vic
Logged
bbarn
Sr. Member
****
Offline Offline

Age: 47
Location: Harmony, PA
Posts: 615





Ignore
« Reply #1643 on: April 10, 2017, 07:15:38 AM »

Not vouching for these guys or their product, just passing along a quick google search. Maybe you can get more consistent materials from one of these guys (or someone else)?


http://fsgsbxg.com/1mmStainlessSteelTube/ss_4mm.htm
Logged

I almost never wake up cranky, I usually just let her sleep in.
Mobacken Racing
Sr. Member
****
Offline Offline

Age: 36
Location: Östersund - Sweden
Posts: 808


Turbine junkie


WWW

Ignore
« Reply #1644 on: April 19, 2017, 03:04:02 PM »

A twin engine bike would be a sight to behold... Smiley

The syringe needles are on their way so I´ll try them first, it is really not that sensitive so as long as the flow is in the ball park and consistent between all 18 injectors it is good to go.

After a great Easter weekend with the family I managed to get some work done on the JU-02 test stand, I borrowed a magnet drill from work to drill bolt holes in the someday-to-be fan dyno stand.



Here the test stand is bolted in place.



I need to add a rear bracket but I can do that later, I drilled a bolt hole for it while I had the magnet drill at home.



Cheers!
/Anders
Logged
Mobacken Racing
Sr. Member
****
Offline Offline

Age: 36
Location: Östersund - Sweden
Posts: 808


Turbine junkie


WWW

Ignore
« Reply #1645 on: April 21, 2017, 04:52:02 PM »

The new 0.7mm syringes arrived yesterday!



Needless to say Friday night was workshop night, here I am removing the old syringe injectors from the fuel plenum.



I am glad I have small hands and kept from drinking overly much coffee... Smiley



With all of the 18 injectors silver soldered and bent into shape I could test flow them with propane, all had the same flame height so they are good to go.



Before I called it a night I assembled most of the JU-01, so there is not much work left before I can do another test start! Smiley



Cheers!
/Anders
Logged
WOODY@DDLLC
Hero Member
*****
Offline Offline

Age: 72
Location: Cincinnati
Posts: 1132


It's GONE ......... the Ohio Mile! :-(


WWW

Ignore
« Reply #1646 on: April 21, 2017, 06:03:43 PM »

Anders, aren't the number of candles supposed to match your age?  shocked grin
Seriously - looking good - as usual!  cheers cheers
Logged

All models are wrong, but some are useful! G.E. Box (1967) www.designdreams.biz
Seldom Seen Slim
Administrator
Hero Member
***
Offline Offline

Age: 69
Location: Skandia, Michigan
Posts: 11814


Nancy -- 201.913 mph record on a production ZX15!


WWW
« Reply #1647 on: April 21, 2017, 06:17:23 PM »

And - you bent all 18 of those syringe/injectors from straight to the flared-over end -- free hand?

Unh, guys, I think we've found us a true magician. rolleyes
Logged

Jon E. Wennerberg
 a/k/a Seldom Seen Slim
 Skandia, Michigan
 (that's way up north)
2 Club member x2
Owner of landracing.com
Mobacken Racing
Sr. Member
****
Offline Offline

Age: 36
Location: Östersund - Sweden
Posts: 808


Turbine junkie


WWW

Ignore
« Reply #1648 on: April 22, 2017, 01:06:04 AM »

Anders, aren't the number of candles supposed to match your age?  shocked grin
Seriously - looking good - as usual!  cheers cheers

Not far from, the main difference from when I was 18 is the amount of nose hair and how far I can Plymouth. grin

And - you bent all 18 of those syringe/injectors from straight to the flared-over end -- free hand?

Unh, guys, I think we've found us a true magician. rolleyes

The syringes are stiff as piano wire but if you heat them with the propane torch and quickly cool them down by blowing at them they become very easy to bend around a finger tip without folding.
Logged
grumm441
Hero Member
*****
Offline Offline

Location: Wazavudu Bellytank Spirit of Sunshine Bellytank
Posts: 1401

HK 327




Ignore
« Reply #1649 on: April 22, 2017, 05:11:40 AM »

The new 0.7mm syringes arrived yesterday!

I am glad I have small hands and kept from drinking overly much coffee... Smiley




Cheers!
/Anders

I know I've had enough coffee when I can thread the needle on a sewing machine, when it's running
G
Logged

Chief Motorcycle Steward Dry Lakes Racers Australia Inc
Now with stars
I build it, Goggles tries his hardest to break it
Pages: 1 ... 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 [110] 111 112 113 114 115 116 117   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!


Google visited last this page November 10, 2017, 07:39:38 AM