Popular Post -BEZ- Posted August 29, 2012 Popular Post Share Posted August 29, 2012 (edited) It has been a while since my last build/project thread so here is a brand new fresh project to rape my wallet and hopefully get the end result of some insane speeds.Project Summary The Project started off as many do with a roller as the basic platform, In this case a HN/Ofna DM1e. The Aim of this project is to attempt to go as fast as possible, With the aim to attempt to get 150Mph ...... but that isnt going to be easy at all and wont happen over night. Im predicting speeds over 100Mph this year at ROSSA (22-23rd September at long marsden airport), But to go faster Im going to be constantly tweeking the design till i get as close to my target as physically possible. As long as it wee's all over a Traxxas X0-1 I will be happy lol, but as things are going currently its not going to be much cheaper lol ...... through this build thread you will find out why -Update 15-09-12- Im Proud to announce the Prompt RC and Sirius motors will be sponsoring this project. Now all i have to do is find the warp speed button The Project Begins ........ The Chassis Being a complete Hong Nor fan boy I set about my piles of HN spare to see what stock parts fitted over std items. I discovered the CR X1 alloy chassis braces were a straight swap, and the Rear dogbones (as standard) were replaced with CR CVDs again a straight swap. I wanted to give the front end a bit more strength so I invested in a CNC shock support. The end result was: The stock setup runs dog bones in the center, I have currently found a kyosho CVD that fits the rear, but unfortunately the front CVD option is currently evading me atm. There are a few things that I have learnt from doing speed runs with 1:8 Buggys which i really want to apply on this build, mainly being aerodynamics and taking into consideration of all the forces at play when pushing a RC well beyond its original design. My first hurdle to over come is to make a smooth chassis to fill as much of the body on the car as possible, the main purpose of this is to reduce the amount of air that can get trapped under the body shell and to try and use some ground effects to keep it planted to the tarmac. As a prototype chassis I invested in some 4mm thick alloy sheet its not light at just under 2kg, but If the design works this year and the car proves to be stable V2.0 will be made from carbon fibre and alot lighter lolStep 1 - OverlayStep 2 - Marking outStep 3 - Cutting out, As im pretty crap at cutting straight lines and the Diff areas need milling I asked candyman ( The god of fabrication ) if he wouldnt mind lending me his skills to cut my design out. A sum of money crossed hands, and I got a cut out chassis in return.Step 4 - Assembly of parts onto the uber chassis what it looks like from the underside with body shell fitted: I decided to drop the Standard DM1 leccy motor mount in favor for the New RC Monster mount, one of the nice things about the new mount is its more designed for 4mm motor mounting points in mind which is good when you plan to use a large motor like the 1717. So with the prototype chassis installed, It time to consider the electronics No doubt there will be more updates on the chassis after ROSSA this year and Once the new saddle layout is finished I will be posting finished layout pictures up -Update 13-09-2012- Thanks to Andy from fast-rc.co.uk I now have sourced the second lipo tray, mounted them up and the layout is starting to look like a RC at last lol-Update 15-09-12- Finally finished soldering lipos and ESC etc, running wires and fitted a mock motor untill my Sirius 1717 arrives pic shows 8s setup The driving force behind the kitAs a few of you may already be aware During testing at ROSSA this year i had not one but 2 Tekin Rx8s fail on me while running my CR speed project, Which to be honest ws a really big letdown as I expected more from the kit. But hey ho these things happen. It did however lead me to strat thinking I'm going to need the mother of all ESCs to run this beast. So after some research and some questions to Nick at Prompt RC i settled on a MGM, this one infact http://www.modelspor...products/368719 . The fiddly bit came once I had the ESC there not the slap any where kid of ECS due to wires entering and exiting the ESC from front and back. So i had to have a little re think about the general layout of the chassis. In the end I decided to mount the ESC central on the chassis and rather than run one lipo tray to run 2 trays in saddle format (pics to follow once i eventually get my second tekno rc V3 tray from the US). Motor wise i will be running a 1717 Sirius and I will be testing it to its full potential up to a juicy 8s ( Power will be supplied by 2 x 3s 5000mAh 65-130 Nano tech packs then growing to 2 x 4s 5000mAh 65-130 Nano tech packs) Gearing on the Project has been all custom made thanks to Neil at RW Racing, I have a few options to run on this chassis starting with 36:30 and a insane 41:25, thankfully due to the standard design of the DM1 using a spool It was just the case of getting 8mm mod1 pinions to fit to the shaft. Steering servo was a dead easy selection for me, a faithful savox 1256Tg, I use alot of these servos and i am yet to have one fail on me Radio gear wise Im using a Spectrum DX3R Pro and running a DSM2 receiver in the case of the DM1 im using the marine MR3000 which isnt cheap but its tiny,waterproof and duel channel (meaning it will be easier to setup a mechanical break) It also has the added benefit of twin ariels so I can get the car extreamly far away and still have full control of it. When I first ran this Rx i had it installed in my CR the range was awesome, as a quick example: At the ROSSA site I can go as far as my eyes can see, so I have no complaints with range issues lol More updates to follow in this section once I have everything mounted up The Body With The kit I got a maclarren shell, but after getting it pro painted by Outlaw graphics I feel reluctant to run it. sooooo, Its going to be a shelf queen shell for when the car isnt run the other 360 days of the year lol ......... That lead me to picking up a cheap protoform shell and doing the signature bez paint job: Now to make the most out of this shell the rear wheels wont be cut out, just the fronts, Also I will be trimming the hole of the rear of the shell off to stop any parachuting effects, the knock on effect of this is i will be needing to reinforce the the top of the shell with some L shape peices of lexan to stop the air pressure forcing the shell inwards. I might even benefit from some ground effects The wing will Be chopped down, but leaving a small flap (a gerneyflap to try and keep the airflow as clean as possible) I will also be making some Huge side dams to keep it stable as possible at high speed as Ive found spinning out at 80+Mph isnt much fun lol. More pics to follow once I have found time to do these mods. - Update 9-9-12 - Well I have finally done something productive and modded the body shell for high speed:Wheels and Tyres (as pictured left to right - Ofna Onroad tyres, GRP M01 Rally A compound - my favorite, Schumacher buggy foams)To me this has to be one of the most important and over time costly parts of any RC build. What you need to be aware of when building a fast RC is the forces at play on the wheels/tyres. I have found from experience brands such as Ansmann/Fastrax/LRP and kit supplied have a tendency to fail even with moderate force in car park play.For High speed there are only 2 options in my eyes either GRP or Foams. GRP Tyres have an extensive history in RC tyre production and make a stonking tyre. I say this from experience they warm up quickly and provide a good amount of grip, add the fact they are belted in the factory(so they only have a very minimal amount of ballooning) on top of that they are pre mounted its pretty much win win. However lots of people prefer to run foams due to the reduced weight and lack of tyre deformation at high RPM. Ive used my foams a bit but untreated. Upon testing i discovered its hard to find traction from >75% throttle causing spin outs. But I am currently looking into some super sticky additives to sort that problem out. One piece of knowledge I have picked off other people running high speed is ideally you want a shore rating of 45 or greater (lower the shore the softer/more traction the foam, higher the rating the harder/less traction the foam) This is due to softer foams suffering alot of damage at high speed.Another good pointer is to balance them, so I can reduce as much as possible any excess vibration coming from the wheel. Its a simple but time consuming job but well worth the effort. You can buy special balancing rigs or DIY solutions. The Finished Project v1.0 Depending on how the runs go at ROSSA I have a future plans for a carbon fibre chassis, a bigger motor and maybe a larger ESC This post will be constantly updated and expanded, so watch this space Edited August 24, 2013 by -BEZ- 12 Quote Link to comment Share on other sites More sharing options...
snchris1 Posted August 29, 2012 Share Posted August 29, 2012 very nice Quote Link to comment Share on other sites More sharing options...
jony nitro Posted August 29, 2012 Share Posted August 29, 2012 Very nice Quote Link to comment Share on other sites More sharing options...
Jacksprogis Posted August 29, 2012 Share Posted August 29, 2012 Great bez , You must be mad Quote Link to comment Share on other sites More sharing options...
camstreet Posted August 29, 2012 Share Posted August 29, 2012 looking awesome bez and I know its going to sound stupid but to lighten up the chassis couldnt you of got candyman to mill out areas? like on the hong nor lightened chassis? cant wait to see a video of it Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted August 29, 2012 Author Share Posted August 29, 2012 Thanks for the comments, there is a long way to go and little time, so there will be plenty of updates over the next couple of weeks lol looking awesome bez and I know its going to sound stupid but to lighten up the chassis couldnt you of got candyman to mill out areas? like on the hong nor lightened chassis? cant wait to see a video of it No point Cam, If the chassis design works, Im going carbon fibre Quote Link to comment Share on other sites More sharing options...
camstreet Posted August 29, 2012 Share Posted August 29, 2012 No point Cam, If the chassis design works, Im going carbon fibre that's going to look awesome! Quote Link to comment Share on other sites More sharing options...
revo madnesss Posted August 29, 2012 Share Posted August 29, 2012 amazing project bez, you fail to half arse things! from my experience with the speed cars and such i was advised that making the car as light as possible should not be a priority and weight can be beneficially as it can give you some stability in light winds i hope you reach the 100+mph Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted August 29, 2012 Author Share Posted August 29, 2012 amazing project bez, you fail to half arse things! from my experience with the speed cars and such i was advised that making the car as light as possible should not be a priority and weight can be beneficially as it can give you some stability in light winds i hope you reach the 100+mph lol yeah I cant stand cutting corners, and all my failures and experiences to date have directed me to where i am today lol Yeah less weight is more of an advantage for short run ups, I will be running the CR again at ROSSA this year hopefully that will go alright, but with that project i am expecting a fire of sorts lol Quote Link to comment Share on other sites More sharing options...
DreXeL Posted August 29, 2012 Share Posted August 29, 2012 Once you are travelling at speeds of 60+ weight doesn't really come in to it, it's all about aerodynamics and power to push the thing through the air. Watching with interest Quote Link to comment Share on other sites More sharing options...
revo madnesss Posted August 29, 2012 Share Posted August 29, 2012 lol yeah I cant stand cutting corners, and all my failures and experiences to date have directed me to where i am today Tell me about it, the only downside is when something does manage to go wrong, it hurts much more Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted August 29, 2012 Author Share Posted August 29, 2012 Tell me about it, the only downside is when something does manage to go wrong, it hurts much more True, but some things should never be skimped on. To be fair tho all the kit i run now has been a process of natural RC selection. Ive blown up several ESCs and found cheap radio gear doesnt always work with high end electrical kit. Not to mention the several servos ive killed racing etc. So its not like i haven't tried the cheaper route at one point or another, but lets face it the best way to learn is from trying stuff out for yourself and making the odd mistake Quote Link to comment Share on other sites More sharing options...
TraxxasMaxxUK Posted August 29, 2012 Share Posted August 29, 2012 Thats awsom BEZ im sure you will kick the X0-1's ass! IT LOOKS FAST JUST SITTING THERE! Quote Link to comment Share on other sites More sharing options...
Dom C Posted August 29, 2012 Share Posted August 29, 2012 Bez you nutter! Dam i love Gulf shells! Quote Link to comment Share on other sites More sharing options...
mugen mark Posted August 29, 2012 Share Posted August 29, 2012 the shells look even better in the flesh,than the photos,the gulf epic,i wouldnt want to run that shell either,cant wait till end of sep for ROSSA Quote Link to comment Share on other sites More sharing options...
micksid Posted August 29, 2012 Share Posted August 29, 2012 Def watching this!!!! Quote Link to comment Share on other sites More sharing options...
Badkad Posted August 30, 2012 Share Posted August 30, 2012 This is the mother of all 1/8th scale on road speed projects. Bez, I would send you money to finish it quicker Quote Link to comment Share on other sites More sharing options...
ScottPro8.5 Posted August 30, 2012 Share Posted August 30, 2012 (edited) GO BEZ!!! Edited August 30, 2012 by ScottPro8.5 Quote Link to comment Share on other sites More sharing options...
snchris1 Posted August 30, 2012 Share Posted August 30, 2012 im following Quote Link to comment Share on other sites More sharing options...
cyronn Posted August 30, 2012 Share Posted August 30, 2012 the shells look even better in the flesh,than the photos,the gulf epic,i wouldnt want to run that shell either,cant wait till end of sep for ROSSA +1 on that Gulf shell. This is the mother of all 1/8th scale on road speed projects. Bez, I would send you money to finish it quicker From seeing it, looks bigger than a 1/8th imo. Quote Link to comment Share on other sites More sharing options...
oranjedrol Posted August 31, 2012 Share Posted August 31, 2012 sooon.......... a beast will be born >: Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted September 1, 2012 Author Share Posted September 1, 2012 Just done a little update on the thread, fingers crossed I should be able to make some progress this weekend on the chassis layout (providing my shed building all goes to plan lol ), but alass Im still waiting on a battery tray from america, as the first order got royally screwed up and wasted about 4 week of build time ............ always the way lol Quote Link to comment Share on other sites More sharing options...
.AJ. Posted September 1, 2012 Share Posted September 1, 2012 Great build mate, it looks like if should be doing 100mph+ even standing still Quote Link to comment Share on other sites More sharing options...
-BEZ- Posted September 1, 2012 Author Share Posted September 1, 2012 (edited) Ta fella, Just cant shake that feeling of a 100Mph fire tho Actually that's a lie, my biggest concern is hitting a timing gate at full speed, it almost like trying to thread a needle while drunk. when the RC is traveling at 80Mph+ lol Edited September 1, 2012 by -BEZ- Quote Link to comment Share on other sites More sharing options...
Outlaw Graphics Posted September 1, 2012 Share Posted September 1, 2012 (edited) watching this closely as i'm doing something similar but with my kyosho inferno GT, i was also hoping to get to rossa this year with it but don't think i'll be able to make it Edited September 1, 2012 by Outlaw Graphics Quote Link to comment Share on other sites More sharing options...
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