(-:AD:-) Posted August 12, 2014 Share Posted August 12, 2014 Something I was wondering but forgot to ask, what's that like pack of 10 black tube things? Looks like small beer cans some capacitors Looking good Quote Link to comment Share on other sites More sharing options...
Oh How Original Posted August 12, 2014 Share Posted August 12, 2014 Never seen anything that big before lol (cue Noj quote...) What do they do exactly? Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted August 12, 2014 Author Share Posted August 12, 2014 No problem with the questions, I will do my best to answer them all for you Whats the limit for the esc and motor? The ESC has a 400A constant and a 500A burst rating. The motor will pull between 270A and 350A under full load. Going by the above figures I assume the motor is 2240kv? I believe the motor works out at a 2466kv rating What lipos will you be using to hopefully hit your 150mph goal? I'm just using some old nanotech 5000mAh 65-130c, Once I manage to sell some stuff I will buy something a bit more beefy To answer Oho's question: That collection "beer cans" is my cap bank. The purpose of which is to reduce as much as possible the ripple current to the ESC. When using long wires >15cm its really important to make sure you are feeding a steady flow of power to the controller to make sure it doesn't effectively trip over its self. Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted August 12, 2014 Author Share Posted August 12, 2014 Some good progress made today Jobs completed: - Fit and tune axle and wheels front and rear - Test fit body It didn't help that I had misplaced a pack of shims that took over 2 hours to find lol ....... I'm also having OCD issues with front half of the rear of the car (if that makes sense) as I should have made it a lot sturdier. What I have will do, but I will try and redesign and print the parts again before she need to run 2 Quote Link to comment Share on other sites More sharing options...
Alex97 Posted August 12, 2014 Share Posted August 12, 2014 whats in the tv to the left? Quote Link to comment Share on other sites More sharing options...
DazzaClio Posted August 12, 2014 Share Posted August 12, 2014 No problem with the questions, I will do my best to answer them all for you Whats the limit for the esc and motor? The ESC has a 400A constant and a 500A burst rating. The motor will pull between 270A and 350A under full load. Going by the above figures I assume the motor is 2240kv? I believe the motor works out at a 2466kv rating What lipos will you be using to hopefully hit your 150mph goal? I'm just using some old nanotech 5000mAh 65-130c, Once I manage to sell some stuff I will buy something a bit more beefy Thanks once again, what voltage will you be running it on? whats in the tv to the left? Desktop 3D printer. Thanks. Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted August 12, 2014 Author Share Posted August 12, 2014 TV? you mean the 3D printer? Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted August 12, 2014 Author Share Posted August 12, 2014 Currently its setup to run 8cells Dazza. If I want to run higher voltage (I can run up to 63V which around 16s) I would need a lower KV motor 1 Quote Link to comment Share on other sites More sharing options...
Alex97 Posted August 12, 2014 Share Posted August 12, 2014 TV? you mean the 3D printer?all I could see was a tv frame, not many people I know has a 3d printer in a tv!have you got any pictures of it? Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted August 12, 2014 Author Share Posted August 12, 2014 all I could see was a tv frame, not many people I know has a 3d printer in a tv! have you got any pictures of it? 1 Quote Link to comment Share on other sites More sharing options...
Oh How Original Posted August 12, 2014 Share Posted August 12, 2014 Dude that looks absolutely amazing!! That body looks seriously top notch! Quote Link to comment Share on other sites More sharing options...
DazzaClio Posted August 14, 2014 Share Posted August 14, 2014 How's the progress now that we are creeping up closely to the event? Thanks. Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted August 14, 2014 Author Share Posted August 14, 2014 How's the progress now that we are creeping up closely to the event? Thanks. Not too bad, I Had a busy day yesterday tweeking parts, soldering etc. I had it all connected up and programmed the MGM yesterday so I can now say; ITS ALIVE muhahahahahahaha Just a new bits to print and she is ready for some runs 1 Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted August 17, 2014 Author Share Posted August 17, 2014 Just got back from the event, and the car performed very well considering it was assembled in a week and it was an entirely untested platform. So the end result from this outing was 133Mph on 80% throttle, which was enough (by 3mph) to win the UK ROSSA championship for 2014 I picked up a interesting large but very brief spike which was causing the ESC to run in reduced power mode (I think). We thought It might have been the lipos, so we connected 2 lots of 8s in parallel ........ it was defiantly a crazy sight: I'm hoping I can tune the glitches out and hopefully attempt a 150mph in October (weather gods permitting). 1 Quote Link to comment Share on other sites More sharing options...
Carpmart Posted August 18, 2014 Share Posted August 18, 2014 Well done Bez! Looking forward to a more detailed write up when you've caught your breath! Quote Link to comment Share on other sites More sharing options...
leongordon234 Posted August 18, 2014 Share Posted August 18, 2014 video video video Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted August 18, 2014 Author Share Posted August 18, 2014 there is a great video, but i'm waiting on porl_hopkins to upload it 1 Quote Link to comment Share on other sites More sharing options...
Oh How Original Posted August 18, 2014 Share Posted August 18, 2014 Well done fella, UK champion for '13 and '14. Some nice going there! Quote Link to comment Share on other sites More sharing options...
chewbacca Posted August 20, 2014 Share Posted August 20, 2014 Epic. Quote Link to comment Share on other sites More sharing options...
Colicab Posted August 20, 2014 Share Posted August 20, 2014 Gratz Bez, bet your well chuffed with the result Quote Link to comment Share on other sites More sharing options...
DazzaClio Posted August 21, 2014 Share Posted August 21, 2014 Well done the pictures look good. That is still a good figure which you got and im sure you will reach your 150mph goal soon . Keep up the good work. Thanks. Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted April 24, 2015 Author Share Posted April 24, 2015 So its a new year and time for a update on the project. The last outing at the end of last year was bad for speed but good for fault finding. I have discovered that the rear wheels are flexing to the point of looking like jelly at 75% throttle which goes a far way to explain some of the issues I have been suffereing recently. Also a uber rare front wheel fell off and was never found and a pot hole pretty much smashed the body to peices. So I have come up with a few solutions: Front wheels have been replaced with modified front GT10 foams cut down to about 10mm Rear wheels are being re designed and Im going to test a printed wheel (using colorfabbs carbon laced filament) Body has been reprinted and is nice and shiney I have some nice fresh pics so I will share some of those too: I also have decided I need to some how fit some form of mechanical brake to the rear axle, Im still trying to design something clever so more to come on that in the future All going well I should be looking to run again at the end of May at RAF Cosford, as shakespear raceway just doesnt seem to have enough space for what I need. But I dont think It will be any serious speeds as I need to test the new wheel designs out and see how they hold up, but you never know I might have a brave/mad moment lol 1 Quote Link to comment Share on other sites More sharing options...
turok007 Posted April 24, 2015 Share Posted April 24, 2015 how about just fitting some sort of wheel disk on the rear to stop distortion. Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted April 24, 2015 Author Share Posted April 24, 2015 Good idea, however it flexes all the way to the hub, its the material of the wheel that's the issue unfortunately. The simple approach is printing some wheels which are of a ridged design, however I'm not sure how well a printed part will stand up to the abuse, one way to find out. The more complex approach is to design a split rim, Alloy rim bolted to a 3mm prepreg carbon disk. This is likely to be the end result but its not going to be cheap lol Quote Link to comment Share on other sites More sharing options...
turok007 Posted April 24, 2015 Share Posted April 24, 2015 will be good to see how strong the 3D wheel is though Quote Link to comment Share on other sites More sharing options...
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