Sweetenough
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Post by Sweetenough on Feb 24, 2021 2:29:44 GMT -5
I love the professional looking instrument cluster with the pen marks for 0-100 π Haha, they have been "temporary" for 4 years now. Was aiming to put something directly on the handlebar instead but I have not got so far
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Sweetenough
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Posts: 121
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Post by Sweetenough on Feb 24, 2021 2:30:13 GMT -5
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Sweetenough
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Posts: 121
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Post by Sweetenough on Mar 10, 2021 2:48:12 GMT -5
A quite windy "test and tune" event is over. Only one run with the jetoped on saturday, then a friend that was testing my water rocket kick crashed and hurt his shoulder. The afternoon/evening was spent at the hospital with him (on prime time beer drinking hour). The engine preformed well with current settings, more AB fuel is needed and maybe increase turbine inlet/outlet temperature. After some rest I will continue to develop a new PWM module operating from 24VDC. Video from the run: www.youtube.com/watch?v=XtqY2ngtUmgGusty headwind from the side made it an interesting driver experience Did not reach 100km/h this year either but came close, 97km/h Without the headwind I think I would have made it. One year of preparation until next attempt Kind regards Thomas
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Post by racket on Mar 10, 2021 3:13:43 GMT -5
Hi Thomas
Thats a rough ride ,..................LOL, I thought ice was smooth ;-)
Nice instrumentation , readouts
Cheers John
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Sweetenough
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Posts: 121
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Post by Sweetenough on Mar 10, 2021 4:00:56 GMT -5
Hi Thomas Thats a rough ride ,..................LOL, I thought ice was smooth ;-) Nice instrumentation , readouts Cheers John Hi John, Also thought that the ice was a smooth surface when I started buildning the jetoped The gusty wind was the main problem this time, almost cut the run short... But to reduce engine power I have to let go with one hand of the handle bars So if it becomes scary you do not really want to do that.... Need to make a solution to control the power with both hands on the handle bars Kind regards Thomas
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Post by racket on Mar 10, 2021 16:21:00 GMT -5
Hi Thomas
Motorcycle twist grips required , maybe "brake/clutch" levers to activate some things ....................keep those hands firmly attached with "white knuckles" :-)
Cheers John
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Sweetenough
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Post by Sweetenough on Mar 11, 2021 2:52:36 GMT -5
Hi John, Yes, something like that would be a hughe improvment. Have an idea about a push button that will take the engine from about 65-70% speed with AB lit on "idle" to max rpm and max AB fuel. Push the button for maximum thrust, release and the engine will ramp down to some kind of low thrust but still with AB on. Then if something happens during the run, release button. If things seem good again, push for maximum thrust.
Kind Regards Thomas
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Post by racket on Mar 11, 2021 3:09:59 GMT -5
Hi Thomas
Yep , that sounds like a "safe" way of doing it :-)
Cheers John
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slittlewing
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Joined: November 2017
Posts: 458
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Post by slittlewing on Mar 11, 2021 18:48:56 GMT -5
Awesome updates Thomas, sorry have not logged on in a while to congratulate you!! The dash is really nice and itβs great that you had reliable performance after all the upgrades πππ
Looking forward to more!
Cheers Scott
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Sweetenough
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Post by Sweetenough on Mar 12, 2021 5:56:00 GMT -5
Awesome updates Thomas, sorry have not logged on in a while to congratulate you!! The dash is really nice and itβs great that you had reliable performance after all the upgrades πππ Looking forward to more! Cheers Scott Thanks Scott! It was nice to finally make a run on the ice, compared to just test engine at home. Looking forward to your updates as well Kind Regards Thomas
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slittlewing
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Post by slittlewing on Mar 12, 2021 8:41:44 GMT -5
No worries, It certainly proves your testing at home worthwhile! The extra electronics are great too, its looking very professional inside your sled!
In terms of your handlebar problem (have to remove hands to change engine/AB settings) so far on my jetbike I am using a single twist throttle, and a push button for AB (my thumb can reach it). This relies on an assumption that the AB fuelling is always proportional to the engine fuelling (which might not be true, I need more testing to find out!)
So far I could only set this ratio once before starting my engine, which made it very difficult to tune the AB. But going forwards I will use a separate pot to change this ratio as the engine is running (thats the plan anyway!)
Cheers
Scott
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Sweetenough
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Post by Sweetenough on Mar 16, 2021 6:37:00 GMT -5
Thanks Scott, Have a couple of different electrical bicyle twist grips that I was aiming to use. I but ended up just using 2 potentiometers one for engine speed set point and one for AB set point. A separate potentiometer for AB fuelsounds like good idea for testing! Also need to do some more testing before making it "fully automtic". Have the one push button start up left to do as well, should be possible with the current setup. Kind Regards Thomas
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Sweetenough
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Posts: 121
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Post by Sweetenough on Oct 12, 2021 2:56:28 GMT -5
Hi, Not much have been going on for a while now, time to start the preparations for speedweekend 2022 Bought a new toy early this summer Have installed it and got my first CAD/CAM experiments done. A lot to learn in this area but it will for sure be a handy machine in the workshop. Rolled a new AB yesterday evening, the individual parts is just tacked together right now. Next step will be to design the fuel injection. Also got help from a friend to construct a PWM circuit that can handle 24VDC, need to increase the AB pump flow and aim to do so with higher voltage. Still in testing, works fine with light bulbs will try it with a fuel pump and see if it could be released for PCB design. Kind Regards Thomas
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Sweetenough
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Joined: April 2016
Posts: 121
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Post by Sweetenough on Nov 24, 2021 7:02:20 GMT -5
A couple of days ago the PCB's arrived from China, fabricated and delivered to Sweden in 8 days. Really impressed in both the delivery time and the look and feel of the cards. Need start to filling them with components. Have devided the controls into one control module and separete PWM power modules, picture shows cards with 2 control modules and cards with 4 PWM modules. Just gone build one "unit" now to control the 2 fuelpumps. (one control module and 2 PWM modules) Control module is going to have an ESP32 controller that will connect and send logg data through wifi to the same influx db/grafana where the rest of the engine data is stored/presented. The turbine controller will still be in the ABB AC70 controller and the new module will only follow the setpoint from there. But instead of having the setpoint in PWM % I intend to have the setpoint in volts to the motor,not have to take changing battery voltage into consideration. Will be an internal control loop in the ESP32 with an voltage PI controller. Lets see what happens when starting to testing if it is an improvement or only excessively complicated Luckily a friend is helping me out with most of the electronics, I kind of get stuck if you can not apply Ohms law Also in the process of making new "dollys" the be able move the jetoped more easy in the workshop. Beginning to be subzero temperatures where I live, hoping for a good ice year Kind Regards Thomas
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slittlewing
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Joined: November 2017
Posts: 458
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Post by slittlewing on Nov 24, 2021 17:44:30 GMT -5
Great work Thomas, I think your plan of separating the control and PWM modules out is excellent. Saves replacing the whole board if things blow up or you want to upgrade!! Did you go for the same mosfet and diode we talked about a long time ago?
I had not researched ESP32 before but it looks very powerful and cost effective ππ
Also The trolley is very professional - did you cnc this on your new equipment!! π
Cheers Scott
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