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Post by racket on Mar 26, 2015 16:32:30 GMT -5
Hi Nick
Yeh , unfortunately you were a bit too early , its really only this last year that these powerful but fast inrunners have been around , there were some "slower" outrunners with plenty of power but they needed gearboxes to get the rpm to the engine up high enough .
The 12 volt automotive starters running on 24 volts worked but were on their limits with regards rpm , these new inrunners are just right for us now with nearly 5Kw of power and 30,000 rpm capability, I'll be using a simplified system like I did with the 10/98 engine where I'll manually push the whole starter motor to engage the coupling before hitting the power .
Theres no problem disengaging as theres very little torque being applied at max starter rpm .
Any new projects on the drawing board :-)
Cheers John
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Post by Johansson on Mar 27, 2015 10:45:48 GMT -5
Was I ahead of my time when I tried electric start on the twin some four years ago?, motors weren't quite up to it at only 1Kw or so. And was asking a lot for journal bearings. Looks like you might have solved it Anders :-) I will say though, I did try three different coupling methods, friction bendix - overheated and 'blued' the compressor nuts. Mating bendix but it just bounced and finally miniature centrifugal clutch; showed promise but needed more motor power. I know you'll figure the sequencing but in my head I'm thinking a very slow turn as the fork pushes out followed by a ramp up in motor speed... :-) Hi Nick! Yup, a slow turning of the starter while engaging the sleeve and then full power. I spent an hour today improving the flow around the starter bracket, a new and smaller solenoid bracket and some grinding made it look a bit less restrictive. I also countersunk the M4 screws so the sleeve won´t hit the heads while retracted. Cheers! /Anders
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Post by Deleted on Mar 29, 2015 3:22:12 GMT -5
Looks good :-) Have you got the controller yet?...as for my projects, in limbo still - got three HT80's sitting here begging to be worked on, plus the patent 'pitot warning' system still plugging away at that, got more meetings this week coming just not getting anywhere fast. Other than that its work as normal. I'm happy watching you guys develop your creations at the moment :-)
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Post by Johansson on Mar 29, 2015 4:37:42 GMT -5
Hi Nick, No controller yet, I ordered it late last week so I expect it to take until next week before the package arrives. Are you planning a triple turbine build to top the earlier twin with? Cheers! /Anders
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Post by Deleted on Mar 30, 2015 2:41:36 GMT -5
These RC devices sure have come a long way with their incredible power handling capabilities. Have you lined up the servo controller to drive the motor controller? If not AndyM has a link to a USB programmable device so you can sequence the motor as you need. There is a plan under way, gathering major parts - while it will be heavy, it will have a better power to weight ratio than the twin and with all the stuff learn't over the years should be fairly quick and painless to put together :-)
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Post by pitciblackscotland on Mar 30, 2015 3:09:50 GMT -5
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Post by Johansson on Mar 31, 2015 16:14:16 GMT -5
It was about time to get rid of the unreliable optical tachometer and try to make something a bit more solid, I´ve bought a Borg Warner eddy current sensor and tonight I fitted it to the engine. My partner in crime Olov is developing an Arduino dashboard/data logger that the tacho sensor will plug into, I will also monitor a handful of pressures and temps in the engine and log everything for later evaluation. My first plan was to buy the Road Rage system but it can only handle four sensors and the seller seems very uninterested in helping me out so we decided to build our own, Olov will use one on the twinturbo jet kick as well. Here you can see the hole where the sensor tip sits, it reads 14 pulses each turn of the compressor wheel in this location. Now I am more or less finished with the engine modifications for this time, as soon as the batteries and motor controller for the starter arrives I can fit them to the bike and start assembling everything for a starter test. Cheers! /Anders
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Post by frankenhealey on Apr 1, 2015 5:51:27 GMT -5
My partner in crime Olov is developing an Arduino dashboard/data logger Cheers! /Anders I'll buy one! Ian
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Post by Johansson on Apr 2, 2015 6:45:04 GMT -5
I talked to Olov about the dashboard/logger yesterday and once the card design and Arduino code has been proven to work he is no stranger to making a batch of them to sell. We´ll put them through the paces in the bike and jet kick first so any hickups can be sorted out first.
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Post by Deleted on Apr 2, 2015 12:12:45 GMT -5
LOL if Nick going to build a triple turbine engine then i may as well build a quad turbine engine I was thinking of making a manifold something like this using ~3mm thick 3 inch steel or stainless steel pipe Cheers, Mark. Working with the awkward angles involved with three is tricky, I might have to get another HT80 and go for four!..much easier to calculate seeing as each will also have a 'toe in' angle to content with as well as the radial seperation.. ;-)
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Post by pitciblackscotland on Apr 2, 2015 14:32:30 GMT -5
Hi Nick, Yep go for a quad setup Cheers, Mark.
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Post by Johansson on Apr 10, 2015 9:31:19 GMT -5
I got the stuff I ordered from Hobbyking earlier this week. I´ve made an aluminum box for the starter electronics and have started to fill it with parts. You can see the Arduino cards and the motor controller fitted as well as a Neutrik Powercon bayonet plug that the battery pack will connect to the box with. Olov has made an ECU for the starter so it will preheat and ramp the motor up to idling speeds automatically. Sweet! For now I will keep the propane bottle and LiPo battery pack externally with quick fittings but later I will use a camping size propane bottle and fit everything to the bike. Then I won´t have to drag any equipment with me for starting the bike. Double sweet! Cheers! /Anders
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Post by racket on Apr 10, 2015 17:51:51 GMT -5
Hi Anders
Some nice goodies there :-)
Cheers John
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Post by pitciblackscotland on Apr 10, 2015 22:09:25 GMT -5
Hi Anders, That's some serious electronics and goodies you have there Cheers, Mark.
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Post by Deleted on Apr 11, 2015 1:30:46 GMT -5
Hi Anders
Looking forward to seeing it all working :-)
All the Best Andy
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