|
Post by Johansson on Jun 11, 2015 23:03:59 GMT -5
LOL Love the way how at 2 minutes 40 you have a group of big tough guys looking on and as soon as you have the first after burner pop they are all ducking for cover.... We have made a sport of spotting those tough guys in the public before the pulsejet starts, mostly they are middle aged, slightly fat and tatooed. They stand in the front row without hearing protection and their arms crossed just like they are the directors of the show. You should see their reaction when the engine starts and invisible sledgehammers of air starts pounding the inside of their skulls 60 times per second... *LOL* Hi Anders Nice :-) Cheers John Indeed! I wish you could be with us at one of the race events, I think you would love it. We laugh and run jet engines all weekend long with not a care in the world. Hi Johansson, I read somewhere in this thread that for the oil delivery you are using a Flojet pump, but i cant get the model information. Is that a special pump which can be used with hot oil(i guess those pumps are normally for water pumping) Cheers, Patty I used a Flojet membrane pump for the first tests, but I changed it to a gear pump later to be on the safe side. I´ll go check the pumps tonight and get you a couple of pics. Cheers guys!
|
|
|
Post by enginewhisperer on Jun 12, 2015 0:05:09 GMT -5
is there anything jet related in Sweden in early September? Looks like I might be there for work
|
|
|
Post by Johansson on Jun 12, 2015 0:29:54 GMT -5
You are in luck, the One Mile race I will be attenting with the turbine bike is 5th September in Färila at the nowadays closed Föne military air base! www.hitta.se/kartan?s=e2d9e8f5Coordinates X 6864619, Y 1496018 Cheers! /Anders
|
|
|
Post by Johansson on Jun 12, 2015 15:19:50 GMT -5
It was about time to get the summer tyres on the bike. The wheels lost roughly 50% of their weight without the spikes in the tyres, I am very eager to find out how much faster it will be on a summer track! Since I don´t have time to look at the P4 gauge I decided to remove the pitot tube in the insterstage duct, hopefully the loss of it will decrease the back pressure for the gas producer a little and lower the temps marginally. A guy at Landracing.com told me that there is a class for "turbine wheel driven motorcycles" at Pendine Sands Speed Week, the current class record is 140,81mph for a standing start mile. That isn´t at all impossible to break since I reached speeds over 124mph in just 1000 meters with the draggy spiked tyres on! straightliners-events.co.uk/event/events/pendine-sands-speed-week.htmlDepending on how the bike runs at the One Mile race at Föne Air base this summer I might start planning for a road trip to the UK next summer. By the way, here are the pics I promised you Patty. Unfortunately the label on the Flojet pumps is worn out so I can´t see the last digits in the serial number. I hope you can make something out of it anyway. The Marco pump is what I use now, it wasn´t cheap but I rather be safe than sorry. Wrecking gas turbines because of a lack of oil isn´t exactly cheap either... Cheers! /Anders
|
|
|
Post by madpatty on Jun 12, 2015 22:07:02 GMT -5
Hi Johansson, Thanks for the pics.
The Marco pump shows max pressure of 3 Bar.... The pressure is already at the verge of what is required for a turbo..
Is the pump able to hold the pressure when oil gets heated up?
Cheers, Patty
|
|
|
Post by Johansson on Jun 12, 2015 22:50:07 GMT -5
I´ve adjusted the oil pressure regulator to 4 bar with warm oil, with hot oil the pressure is a bar or so higher but I am not sure if this difference is related to the home made regulator or the pump.
It works great for me at least, and I am bleeding off oil for the gearbox lubrication as well so it flows a lot of oil.
|
|
|
Post by enginewhisperer on Jun 13, 2015 6:20:25 GMT -5
The 5th of September might be doable! I will certainly try to be there if possible
|
|
|
Post by Johansson on Jun 13, 2015 15:09:28 GMT -5
The 5th of September might be doable! I will certainly try to be there if possible Great!
|
|
|
Post by Johansson on Jun 14, 2015 16:01:25 GMT -5
One of my major concerns with the bike fairings is how to properly fit the front fender, only using the holes in the glass fiber fender makes the whole thing rather rattly so I wouldn´t trust it to stay in place at >300km/h speeds. To solve this I cut a strip of 3mm steel today and make a supporting structure for the front end of the fender. With the foam glued to it the fit is very snug and precise, the whole fender is much more stable now so I am more than pleased with myself at the moment. My uncle Hasse dropped by today with a gift for the jet racing team, very kind of him but I can´t understand why he thinks I will need a fire blanket and a bag full of burn cooling gel... Cheers! /Anders
|
|
|
Post by smithy1 on Jun 14, 2015 16:27:37 GMT -5
Maybe he watched your last engine start video Anders....where you nearly lost your ar$e...! Cheers, Smithy.
|
|
metiz
Senior Member
Joined: April 2011
Posts: 297
|
Post by metiz on Jun 14, 2015 17:11:38 GMT -5
Hmmm didn't know there was such a thing as burngel...might come in handy
|
|
|
Post by Johansson on Jun 15, 2015 4:40:49 GMT -5
Maybe he watched your last engine start video Anders....where you nearly lost your ar$e...! Cheers, Smithy. Might be... Hmmm didn't know there was such a thing as burngel...might come in handy If we had it when Olov toasted his leg on a hole in the afterburner 4 years ago he would probably have been able to walk properly the following summer.
|
|
|
Post by Johansson on Jun 26, 2015 7:12:12 GMT -5
With the arrival of some kind of summer I am quite busy building sheds and casting a concrete floor in the cold section of the workshop, luckily I haven´t got all that much stuff to do on the bike before One Mile in Färila in September. One of the things I need to do is a tachometer for the gas producer, Olov has promised to help me out with the electrical stuff so this week I drew a display housing in Inventor and 3D-printed it in PLA plastic. I also had to change the gearing a bit to allow for a higher top speed now that I run on regular street tyres without draggy spikes, some calculations gave a list of top speeds for different gearings at 30.000rpm power turbine speed. I like a bit of safety margin before the centrifugal force starts stretching the blade roots. I fitted a 20 tooth sprocket which gives the bike a top speed of 320km/h, I don´t think I´ll reach it in a mile but it is easy do change sprockets at the race. To get rid of the nasty steering wobble I changed the cheap Ebay steering damper to a genuine BMW S1000RR damper, since it hasn´t got the same shape as the China damper I had to make a custom bracket for it. Here I´ve just cut the bracket out for test fitting, later I´ll make it a bit more pleasing to the eye. It turned out pretty well I think, I would prefer to have the steering damper travel a little bit longer but the fairings and air box was in the way so it ended up in this position. Cheers! /Anders
|
|
|
Post by Johansson on Jun 28, 2015 12:24:26 GMT -5
Here is a summer greeting for you guys, finally the summer arrived to Sweden! Cheers! /Anders
|
|
|
Post by smithy1 on Jun 28, 2015 15:06:41 GMT -5
Looking really good Anders....will be interesting to see how fast it will go over the mile....there's plenty of torque available so I think you might be surprised at how well it accelerates...
Cheers, Smithy.
|
|