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My Brushless 8ight Project
Finally after 4+ months I have most of gear now to start building my 1st brushless 1/8 project. Ended up deciding on the Losi 8ight as have owned 4 other Losi vehicles in the past and parts for Losi are really easy to get. The Losi 8ight I got was the Roller version which had most of the chassis built which made life abit easier and quicker :whistle: I started looking around for Brushless kits and got talked into getting the RCPD kit. That took around 2 1/2 - 3 months to arrive on my doorstep which was abit of a pain as I couldn't start working on it until those parts arrived. It took me a while to decide on what motor to go with but ended up deciding on the Neu 1512 2.5D/F 2050kv and running it off 5S which works out to be 37925rpm. I ordered a MMM which has been sitting on my computer desk for 3 weeks now still in the packet as still waiting on other parts and free time. I went to order 2 x Maxamps 5S 5000mah but the day I went to order was the day that my discount went from 15% back to 10% which I ended up changing my mind on. Deciding on a battery probably took the longest and eventually ordered 3 x Protek 5S 4000mah (4000mah is the highest they make) . It takes usually 2 weeks to get goods from US to Australia and by the time the batteries arrived a few MMM's had died and rumor was going around that it was because of the batteries. The Protek batteries are 20C Cont. and 30C burst for 3 seconds so after more deciding I ended up sending them back to Amain and purchasing 2 x Thunder Power V2 Extreme 5S 5000mah 25C/50C which only arrived yesterday. So finally the building has started today. The RCPD kit is all installed and I cut down the radio tray with a small hacksaw. Probably paint them down the track but for now just get it all together and going. Radio gear will be my old JR XS3 Radio and JR RS300 RX running a Airtronics 94358Z Steering Servo. The RS300 is a real tight fit in the RX box which will have to get changed down the track. The 5S lipo battery is fairly tall and does manage to hit the body but doesn't make the body sit up.
This was also my 2nd body I have painted. http://www.geocities.com/athowells_r...cm/001_sml.jpg Body painted and fitted http://www.geocities.com/athowells_r...cm/002_sml.jpg Some of the parts http://www.geocities.com/athowells_rckaos/rcm/004.jpg RCPD installed http://www.geocities.com/athowells_r...cm/005_sml.jpg Size difference of the Neu 1512 compared to a 540 Silvercan http://www.geocities.com/athowells_r..._motor_sml.jpg |
That looks fantastic! You got the new RC Product Designs kit with the ultimate battery tray and beefed up top plate/mount. That's the latest and definitely worth the wait. The setup sounds perfect. The only suggestion I would make would be to have a Mamba Max and BEC handy. It would suck to wait all that time and do all that work, just to have it sit for another month or so while your Monster is being fixed/replaced.
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I got a BEC handy which I might use for the 1st few runs, don't have the MM anymore, sold it to fund for this project, if the MMM fails and they haven't gotten the bugs worked out yet will try out a MM
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HaaaaYYYYyyy it's finally moving along!!!:party: All rite!! :yipi: Looks great Drift Buggy!!! You’ll have to report back on your motor (I’m thinking of getting the same one!) I would value your input / experience with that and those Thunder Power V2 Extreme 5S 5000mah 25C/50C Lipo’s.. :yes:
The painting turned out great!.. I wish I could half that good.. Do you know how much it weighs?. What is your gearing setup?. I looked at the RCPD kits and inquired about them for the Xray, I was informed that they haven’t even started the 808, the XB8 would be complete in two months. Again thanks for sharing your latest BAD BOY!.. Well done...:yes: Sir.. |
man that thing needs some dirt on it! lol. body looks awesome. and holy cells! three 5s's waiting to be used! you will be able to run forever!
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Nice looking buggy! im waiting on my Losi 8 to arrive, i have to compare it to my MBX5 prospec..... there can be only one *lol*
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Well, was hoping to get most of it complete today but only managed to get the esc and motor together and get servo in. Working bee on tomorrow at local track and race day on next day so probably won't get much time then either :tongue: Might have to be a late night tomorrow night. Have also decided on running a external BEC (Castle) and also have a Novak fan coming incase in the standard one dies
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Well got the ESC all wired up and got the deans plugs on the batteries and charger. The battery was taller than I thought, might actually try to cut inside the battery tray down lower so the battery can sit lower as it does make the left side of the body sit up abit. Also used a dremel and made the flat spot longer on the Neu Motor. All that is really left now is to mount it all in and charge the battery and hopefully it will go.
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Well this is what it looked like at the start of today
http://www.geocities.com/athowells_rckaos/rcm/006.jpg Here is a pic that you can see the front motor cover that I cut out to cover the holes. Will see how it goes, might look at putting mesh or something in front instead but will depend on the temps. http://www.geocities.com/athowells_rckaos/rcm/007.jpg Currently this is how it looks like. Just got to connect up all the wires and clean them up. http://www.geocities.com/athowells_rckaos/rcm/008.jpg |
can i just say, that that wing looks awesome :)
cant wait to see how it goes. |
It's going, had it running for around 10 minutes with no problems about from the toe being out on the front tyres. Also, when connecting the battery the connectors do a little spark which would probably be from the ext. bec being on, not sure if there is a way around this.
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briang has a calulator and instructions to install caps to prevent this. it happens when the caps in the esc charge up. hope this helps :)
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Well had it going for 15 minutes out the front of my house playing around with it, no issues at all, MMM working fine and so is the fan. Running 14T Pinion and 46T Spur temps looked pretty good.
Motor: 94F ESC: 92F Battery: 84F Air: 73F But that was with the body off |
Awesome!! Looking real good..
Question, that’s not a RC monster battery try is it? do you know what your total height is from the chassis to the top of the lipo?, I'm just curious to see how much room you have vrs my 808, my total height is 44.38mm (battery tray and 5s 3700mAH lipo. Great build, now lets see it get dirty!.. Have a great one.. |
No, its not a RCM Tray, its a RC Product Design Tray. Sorry, i'll have to measure it later on but the tray is thick, thinking of maybe trying to cut it down somehow so the battery can sit lower to the chassis. The battery makes the body sit up a little bit. I weighed the buggy with lipo and everything on and it is 3.7kg but will work on that later
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Back to work tomorrow so hopefully I will be able to use it at the track in 3 days :party: unless I got picked for Jury Duty :diablo: which probably will happen :whip:
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Lets us now how it goes at the track!, I hope you have a better experinace than my last one...:yes::lol::lol:
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Well finally got to give it a test at my local track.
Ran for 24 minutes until the Motor got up to 155F and shut it off. Battery was 95F and the ESC was 110F. Fan still works on the MMM and had to problems with it at all. After it cooled down went out for another 5 minutes on the same battery but the battery holder (gorilla) snapped :diablo: which sent my lipo flying & flipping accross the ground and ending my day :whip: Heard of alot of guys having trouble with the straps snapping but would of thought it would of last longer than 29 minutes. |
Here is a shot of the esc settings I had it at. Just measured the battery voltage and battery still had 19.12V left (3.824V per cell)
http://www.geocities.com/athowells_r...ngs_190608.jpg |
some heavy duty velcro on both the battery and battery tray works great.....sometimes its even hard to get the battery out fo the tray if you use heavy duty velcro...i buy mine at home depot:yes:
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The Neu motor did get up to 162F at one stage and I was reading in the FAQ section that generally a hot motor and cool RX/ESC usually means it is undergeared. I am running a 14T/46T which makes it geared for 44mph and I really don't need any faster for the track, I was flat out getting up to top speed as it was. Might have to work out how to get some air flow to the motor, I don't really have room to put a fan on the motor.
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Worked out what I am going to try out with the battery strap. It snapped on the small end with the buckle so I am going to
A) Put strong velcro on the bottom of the battery tray and on the battery B) Use canvas on the short side with the buckle Will try that out and see how it goes http://www.geocities.com/athowells_r...illa_strap.jpg |
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What oil weight did you use for your center diff??. I used 30K Thanks for your time DB.. Have a great Friday / Weekend.. Shaun. |
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Just finished making the new battery strap/hold down. I got heavy duty velcro from my garage from when I use to work at a Car Entertainment Installation shop. I used canvas (2 layer) on the buckle side of the strap and made in longer than the standard Gorilla strap since I am running a tall/large battery
http://www.geocities.com/athowells_r...m/100_3630.jpg http://www.geocities.com/athowells_r...m/100_3631.jpg |
Got to have more fun with it today in my backyard and in my street. Just jumping around on a little jump and flying around the backyard then going out the front and doing some speed runs. Ran for about 30 minutes (battery still had power) but was starting to get really cold and dark. Motor temp was 110F and ESC 90F Battery 85F with same gearing as the track
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Very clean conversion! Nice job! :yes: Is that the RC Product designs battery tray?
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i ran my conversion today at the track, my mm is f'd up, keeps losing signal! got one i can have there drift? lol
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Well I got to do back the track today. I ended up first using that same battery that I was playing around with yesterday first up (didn't recharge after yesterday). I managed to get 35 minutes of run time on it which totally shocked me considering I was playing around in the back yard with it yesterday. Motor temps were between 145F - 160F, ESC 100F and Batt 95F. I then went out and got lunch and returned to the track to use my other battery which was charged up a few days ago and got 33 minutes on it but had to stop as one of my tyres unglued itself off the rim. Temps were Motor 150F - 160F, ESC 112F and Batt. 107F and I was going full out racing (midday to). This is unreal, will never go back to nitro again. No problems at all with the MMM ESC and even the standard fan is running great. Can't wait to get back out to the track
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2 More Pics - 1st one is in the pits and the 2nd one is my 17 month year old boy thinking he is helping out
http://www.geocities.com/athowells_r...m/action13.jpg http://www.geocities.com/athowells_r...toby220608.jpg |
Really nice work on your car. I like the painting job! The rcpd battery tray looks nice. Whats the "RTR" weight?
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