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MSc Shobaki

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Everything posted by MSc Shobaki

  1. MSc Shobaki
    Thanks! The car is currently undergoing a massive rebuild of the front suspension in order to carry the LPE due its weight and space. The rear suspension works good as of now, if I rebuild it: it will only be for better dampening. For shock absorbers in the front suspension, I'm using big pneumatic cylinders which I took apart and then inserted a spring from the 9.5L shock absorber. This does not only make the suspension stiffer but also to give it a dampening effect like a real car. As I'm currently reworking the front suspension, it has now the most important properties: Ackermann Steering Some 5-10 degrees of caster angle (haven't measured) Camber angle of 2-5 degrees (same as above) Full Mac Pherson-setup The plan is to try replace the modules of Sheepos car with my setups but to keep the frame as it is. More pics coming soon!
  2. MSc Shobaki
    Hey all! After starting building Sheepos Shelby GT500, I remembered that I had just finished building an LPE-I3 which I thought would be perfect to implement into the upcoming car. As I got closer to finish the chassis, I removed the fake engine and the PF-motors and replaced them with my I3. In order to achieve a nice compact, sequential gearbox which would fit good between the engine and the rear axle, I chose to use Sariels 4-speed gearbox but with a few modifications only to make it stiffer. Here are a few shots of the WIP: https://www.flickr.c.../132369452@N07/
  3. MSc Shobaki
    Remember this as well: Each time you gear up or down, the speed will either increase or decrease resulting in opposite effect on the torque. Higher gear= Lower torque But most importantly, you also need to consider efficiency as well where each stage of gearing results in 95% of the actual torque (power)/speed in that stage's output. E.g. A motor connected to a 3:1 gearbox with input speed at 180 rpm. Basic math would give an output speed of 60 rpm, however due to power loss in the gearing, the actual output speed would be around 57 rpm. This efficiency should be considered at every down/up-gear stage as it will affect the total output in both speed and torque and the latter in power.
  4. MSc Shobaki
    @LeocornoProductions: I have a Masters' degree in Machine design, so I'm sure about it. Dont you mean 0.16 HP? If you have a look at my calculations, I'm talking about a single cylinder LPE peaking at 2400 rpm at 8 bars ;) so in theory, it sure is true. However, in reality it would differ due to friction, gearing, and vibrations :)
  5. MSc Shobaki
    Assuming that you only have a one-cylinder LPE, with 1 stud as a turning radius, then Torque= Force x Radius E.g: M= 106.2 x 0.0078 = 0.8 Nm Assuming angular velocity in RPM: 2400 Ang V in rads/s: 251.3 Power= Torque x Ang v = 0.8 x 251.3 = 208 watts
  6. MSc Shobaki
    @nicjasno: Simple. Force=Pressure x Area (piston) Assuming piston diameter D=13 mm Then piston area becomes 1.3*10^-5 m2 Pressure in Pa= 800 000 at 8bar Total force= 106.2 N per cylinder. In order to calculate the total force and torque of the engine, a dynamic analysis has to be made
  7. MSc Shobaki
    I think you move in Z-axis using the scroll on your mouse. I have LDD, but somehow I do CAD-models in SR3D. That is at least how you do it in SR3D :D
  8. MSc Shobaki
    Allright!! Now I'm impressed. You got my vote, respect and a mighty applause. You sure lived up to your teasers. Great work
  9. MSc Shobaki
    I'm not being rude or anything, but I just have high expectations of your moc due to the amount of teasers you put up :) so in that case, I hope it will be rocking!
  10. MSc Shobaki
    It better be good...
  11. MSc Shobaki
    I'm hoping for a small, 2 stud thick cylinder. It would be a dream come true to buy a few of them and modify them in order to build a compact LPE. What do you think about that Nicjasno? :D
  12. MSc Shobaki
    I would say that I'm very interested in working with you. I have a Masters degree in Mechanical Engineering and Advanced Machine Design. Currently, I work at Scania in transmission development and I have high knowledge about cars
  13. MSc Shobaki
    Oh Come on!!! :D It is a Saab Rally 900-series, modular built by Ikea (in the comic). Pew pew= Boost function maybe... Hmm maybe using the two M-motors along with L-motor to make up an adder/subtractor. Let's say it runs on two M-motors and more torque is needed, *PEW* L-motors kicks in for a second (Turbo Boost function) hahahaha
  14. MSc Shobaki
    If you read his first post, he clearly states it has a manual gearbox ;)
  15. MSc Shobaki
    I think he is building a Saab rally car of model 900 2.0T. Manual transmission, L-motor for drive, servo motor for steering. M-motors for some extra functions
  16. MSc Shobaki
    I vote for 4x L-motors if you can pack them in and brace nicely. As for the suspension lift, I'd go with M-motor with worm gearbox. Good luck!
  17. MSc Shobaki
    It may be stronger with studded parts, but you sure can build a studless car very strong if you brace sections in all directions. Plus, it is way more challenging to build studless. @nicjasno: Excellent! It sounds very interesting that you will try to use panels. And that you will see what to do with the 2L bars, as they are modified, it is better if you could eliminate such parts
  18. MSc Shobaki
    @nicjasno: Why dont you build it fully studless? It would be cooler to have it like that. And also, is there a way to rebuild the rear suspension without the 2L bars that you use?
  19. MSc Shobaki
    My other hobbies beside Lego is drawing mechanical drawings and coming up with new innovations. I did compose music for six years digitaly, where I spent two years teaching myself how to play the piano.
  20. MSc Shobaki
    Here is a link to my solution, prepared with M-motor for RC-control. Feel free to comment! https://www.dropbox.com/sh/zkvp9a2tj3447os/AACc-ffpXP16P-lY06Y450Hea
  21. MSc Shobaki
    Hey, very interesting topic! Long ago, I built a throttle control for my LPE-engine which was compact and manually operated. The this is that my concept differs heavily from yours as I do not use any valve whatsoever. It is a mechanism which squeezes the input tube and can be easily motorized. Here is a link of my throttle control in action: http://youtu.be/MX-M5fc3nsM If you would like, I can quickly model you a CAD-model of it which is powered by an M-motor.
  22. MSc Shobaki
    It turned out to be perfect just by replacing the M-motors with L-motors which are on their side! Will post images soon
  23. MSc Shobaki
    Hey!! That's a nice idea to look into! Will look into it tomorrow and tell you about the results
  24. MSc Shobaki
    My problem as it is now is that the transmission output shaft collides with the bottom part of one of the L-motors. To solve that problem in order for the model to feature dual L-motors, I need to re-route the system
  25. MSc Shobaki
    I have three IR-recievers available; 2x V1 and 1x V2. Could the V1 handle two M-motors? Just so that I know for future projects. It seems that you believe more in the L-motors rather than the M-motors, so I should probably re-design the transmission to make room for L-motors.
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