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RE: Can i use a heli esc for mini
1/18th scale you'll probably need a 20A ESC or better on 3s lipo. Heli ESCs can be used with a programmable Tx but rarely have reverse or a variable break and a 0(neutral or a brake setting only)-100%(full power) throttle/stick, where as a car ESC is 0%(100 brake or reveres)-50%(neutral)-100%(full throttle). Briefly as I am late. You can use a heli ESC to get by (I did initially) but you will probably miss the extra features of a proper car/truck ESC.
Posted on: 10/14/2009 2:37 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=9171849
RE: Mamba 25
Either not sending a neutral point to arm ESC, or not sending 100% throttle(reversed?) or ESC in wrong Rx channel or Tx not bound/crystal miss match. The ESC will arm at 50% throttle stick (where 0%stick=full break, 50%=neutral, 100%=full throttle), give the trim a nudge around the neutral point to arm and get beeps. To enter programming mode, hold 100% throttle then power on the ESC and hold for a ~5 seconds. Otherwise, be careful and try reversing the Tx throttle and make sure the ESC is in the correct Rx channel and the TX throttle end points are opened up (if your using a programmable computer Tx)
Posted on: 10/9/2009 11:54 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=9159166
RE: Xray M18T and M18MT RTRs!
M18MT has large wheel/tires, so I run an [url=http://www.horizonhobby.com/Products/Default.aspx?ProdID=HPI72480]8T metal pinion (2mm ID, 0.5 mod roughly 48pitch )[/url] on the stock plastic 54T spur, makes more noise but it allows me to gear low enough for fast garden bashing on 3s with the little 5400Kv mamba. Probably max out around low 20s mph (at nominal voltage), flips and wheelies on demand in grass or street surfaces or spins like a demon on the loose stuff (it's a basher for sure [:D]). The metal spurs is even more noise (a few left on the shelf as spares) and the plastic spurs last so long, even using metal pinions as long as the mesh is pretty close. The problem with my aged M18MT is that the top deck and chassis can twist under power causing the pinion to skip, this eventually takes a tooth out and isn't long to a spur replacement. With the battered frame I just have to suffer a bit more noise with a slightly closer mesh. Note that I used to regularly power/torque flip upright from a roof tumble, now a days I don't do that so much. [i]module = 25.4 / pitch 48 pitch = 0.529 module[/i]
Posted on: 9/1/2009 1:27 PM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=9061869
RE: Very strange...Mamba 25 will not allow binding...Rx non-responsive??
You need to send a mid stick 50% throttle from the Tx to arm the ESC. Try recalibrating the ESC end points to your Tx by entering programming mode powering up at 100% throttle (disengage the pinion from the spur just in case). Locate Castle Creation PDFs http://www.castlecreations.com/products/mamba.html
Posted on: 8/10/2009 12:20 PM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=9004849
RE: Xray M18T and M18MT RTRs!
Depends on what the intended driving and surface is going to be. My M18MT (Hummer) basher is running a small Mamba 5400Kv motor on 3s 11.1v lipo 54T/9T, either 8T low speed to 12T for smoother road speed (way faster than the large wheels with higher centre of gravity and battered loose suspension/steering can handle, 25mph to may be 35mph max) plastic or metal pinion. Then drop down if the weather is warmer or take breaks and avoid too much hard braking. The Mamba's I've had all cook because I gear them to high on 3s and they are only really a cheap n cheerful option. They are probably not that efficient inrunners, when they get hot (+80ºC can temp, may be hot cup of tea like) I think the magnetic core starts to degrade it's strength and the Kv goes up slightly but becoming less efficient as the heat output increases and so on until the motor is always pretty hot after less and less action. Only tried similar quality/types of inrunner and the longer the can the better the peak power seems, not really useful power in my truck given it's size, weight and poor condition [sm=50_50.gif].
Posted on: 8/9/2009 3:26 PM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=9002429
RE: Xray M18T and M18MT RTRs!
Nice one filzemail ;). I haven't had much truck time for a while now but will still hang on to what I have. Last month I had an long version E-flite 4200Kv 68g motor magnetic core break apart and is now trash, back on the little Mamba 5400Kv which works but cooks (probably previously heat damaged already). > quesiton about the X ray micro servo... Does sound like it's assembled the gears wrong, they use a potentiometer arrangement to seek desired heading. The 'pot' isn't being driven on your assembly. The stock Xray m18t metal geared servo's are pretty tough if water is avoided. I belive they are HS-M81 MG rebadged (HS-M82 MG metal geared are newer), cheap and tough enough replacements ;). There are reports of centering problems on the HS-8x and I had one go bad after a year of use, guess that could happen at anytime though.
Posted on: 8/9/2009 3:58 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=9001409
RE: Xray M18T and M18MT RTRs!
[url=http://www.rcmart.com/catalog/rc-m18t-m18mt-xray-alum-drive-shaft-385301-p-20518.html]Xray Ali $30 (for 2)[/url] [url=http://www.rcmart.com/catalog/rc-m18t-m18mt-atomic-drive-shaft-stengthened-xray-xrt7-p-15967.html]Copies Ali $10.5 (for 2)[/url], get 6, on fronts the copies can break up eventually.
Posted on: 7/20/2009 12:28 PM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8948822
RE: Xray M18T and M18MT RTRs!
Yes it happens from time to time on impacts. Either add a spacer to lengthen the stopper from the hub suspension block or remove the stopper to prevent it from jamming on the lower suspension arm. The reason the stoppers are used is to stop the front wheels from turning to a high angle and reduce CVD (UJ drive shafts) from powering at steep angles which could damage them. Expect the stopper are less important for the m18t Pro steel CVDs, where as the original stock plastic CVDs probably wouldn't have bee happy for long, hence the stoppers were useful. I've ran without the stopper posts and not noticed any ill effects on the Pro but I have broken plenty of the weaker cheap blue Atomic CVDs. EDIT: Just checked one of my Pro's and they don't have any stoppers fitted but still jam on full lock occasionally in a front impact, a quick reverse/forward and or wiggle the steering normally sorts it out.[;)]
Posted on: 7/18/2009 5:31 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8943000
RE: cheapest mini, that will handle mamba 5400 3s
http://www.rcxray.com/xray-cars-kits/ http://www.superfastrc.com/xray-m18tm.html Dig around to make sure they are for you (or maybe try an RC18b plus ali). Some RCU threads: [url=http://www.rcuniverse.com/forum/fb.asp?m=6612331]Xray M18T and M18MT RTRs![/url] [url=http://www.rcuniverse.com/forum/fb.asp?m=7300017]Just sharing - M18T - best 1/18 car I've ever bought!!! [/url] [url=http://www.rcuniverse.com/forum/fb.asp?m=7862629]Xray M18T_Pro Thread[/url] [url=http://www.rcuniverse.com/forum/fb.asp?m=6889234] Xray M18T_Pro ... I'm in love[/url]
Posted on: 6/16/2009 3:51 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8855778
RE: cheapest mini, that will handle mamba 5400 3s
Depends on the lipo physical size... Xray m18t Pro (not the cheapest) or m18t/M18MT RTRs (plus 4x ali CVDs and 4x ali hub blocks, atomic blues or genuine Xray) Very very difficult to break the drive train with a 3s Mamba5400Kv combo (keep ball diffs moderately tight enough to wheelie). Gear range is 20 on 8T pinion to 45mph(+14T on smooth surfaces) but that motor will get very warm geared over 35mph (throttle management dependant).
Posted on: 6/15/2009 2:05 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8852739
RE: FTX Fury
see my opinions by following the [url=http://www.rcuniverse.com/forum/fb.asp?m=7949325]links in this RCU post[/url];). I even managed to break the [url=http://www.rcuniverse.com/forum/fb.asp?m=8813705]Himax motor shaft[/url], the best thing on the vehicle.
Posted on: 6/7/2009 2:17 PM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8832842
RE: what would you choose???
The extra ali and hop ups in the m18t Pro are essencial and well worthwhile for the cost but you have to build the kit and spray the body shell.You can always buy a set on M18MT wheels and tires later, plus the hardwearing stock M18MT chevron tires are pretty useless on street, thraxbig block/pin are much better. I'm not familiar with the other options on the market today but look around anyway ;). Check flee-bay for some cheap second hand deals. > can the m18mt handle brushless+3s lipo??? Yes if you get 4x ali CVDs. More likely to break plastic suspension hub blocks in tumbles/crashes as the power levels increase, the pro comes with ali as standard.
Posted on: 5/31/2009 2:37 PM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8813848
RE: Xray M18T and M18MT RTRs!
Just to let ya know... that after a year or so I managed to snap the 2mm shaft on a Himax 2025 5400Kv motor whilst torque flipping upright (a mentioned in [url=http://www.rcuniverse.com/forum/fb.asp?m=7951056]this post[/url]). Between me and a friend we have broken 3 Himax inrunner motor shafts because the 2025s come with a 'D' shaped 2mm pinion seat, a weak point that seems to fracture under high loads (100% throttle 100% break cycles with tight diffs). I guess that it does high light the relative strength of the rest of the drive train with ali CVDs (universal jointed axel drive shafts).
Posted on: 5/31/2009 1:05 PM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8813705
RE: 2s vs 3s / mah / runtime ?????? In my b/l vendetta
If you [b]reduce the pinion gear to compensate the extra voltage[/b] to produce the same top speed at 100% throttle then you would see about a 30% increase in runtime using a 3s instead of a 2s at the same mAh capacity. You have to allow for carrying the extra weight of the cell and may be balanced against the efficiency gained when running a higher voltage and pulling less Amps to produce the same power (P=IxR). Have a play here: http://dhrc.rchomepage.com/RolloutCalc.htm Remember Amps are an estimate, if a setups top speed increases then the current draw increases but this simple calc can't model such things but it should give you an idea of ball park figures.
Posted on: 5/11/2009 1:42 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8758585
RE: Brushless Motor KV: Power vs. Speed
Have a play here http://dhrc.rchomepage.com/RolloutCalc.htm and check the info/links to other online resources ;).
Posted on: 4/23/2009 1:57 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8707635
RE: Xray M18T and M18MT RTRs!
Found a couple of recent youtube vids (modified setups) messing about: http://www.youtube.com/watch?v=IvtusAJRU2s http://www.youtube.com/watch?v=rEvkHTApdng http://www.youtube.com/watch?v=AnCg1MQ62sk
Posted on: 4/19/2009 8:11 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8695039
RE: Xray M18T Question
Yes, taller wheels giving a higher ride height and too much grip makes the trucks roll/tip over far too easy.
Posted on: 4/13/2009 7:14 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8676099
RE: Xray M18T Question
I've only used the m18t (stock on-road tires) and larger M18MT (Chevrons better on Thrax pin block) so never tried the 1/10 wheel adapters. There is better selection of tires available now.
Posted on: 4/11/2009 3:23 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8669901
RE: I'm not sure what car to get
Also look at the [url=http://www.rcuniverse.com/forum/m_7676565/tm.htm]Mini Buyers Guide[/url] might help ;). It's a sticky thread at the top of this fourm. Pro Pulse might be a suitable cheap starter.
Posted on: 4/8/2009 12:51 PM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8661386
RE: Xray M18T Question
The 2 gap shock absorber pistons are quite resistant and the stock springs are quite weak which are normally replaced with N18T black or pack with cable ties for higher ride height. The problem is exaggerated by grit in the suspension ball joints causing a little bit extra friction or drag on the suspension recoil. The pro version has better nickel balls and less prone to wear or wearing the ball sockets on the suspension arms. No biggy but annoying. Check the info and links in the [url=http://www.rcuniverse.com/forum/fb.asp?m=7051854]Xray M-18T and M-18MT RTRs![/url] thread ;).
Posted on: 4/8/2009 2:05 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8660208
RE: 4s in a mamba 25
Well, as long as any braking/accelerating doesn't exceed ~300w sustained (300w /14.8v = 20A for a safe margin) then the ESC should be ok. Electrical current measured in Amps causes heat in the ESC and too much may result in component failure (placement for natural cooling and air temp dependant).
Posted on: 4/6/2009 2:35 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8653168
RE: Castle Micro Pro
> the following Mamba Micro Pro settings can be changed with the transmitter: The instructions should explain that at power up with the correct sequence of full throttle, neutral and break from the Tx you can enter a limited programming mode and answer yes or no to thos options as they step through waiting your answers via the Tx.
Posted on: 4/5/2009 3:38 PM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8651206
RE: 4s in a mamba 25
I think the Mamba25's are similar to the old CC Phoenix10 and P25 ESCs, which will run 4s as long as you use a separate 5v BEC. This is because the old style regulator BECs normally step down from a max of 12.6v (3s charged) down to a usable 5v BEC rail, wasting the excess difference as heat. On 4s the Mamba25 BEC must not be used to power the servo's and Rx, so disconnect the centre servo wire from the ESC and run a separate BEC that will handle 4s voltages (or more). The newer more efficient BECs use switching technology instead of the old regulator method. The [url=http://www.dimensionengineering.com/ParkBEC.htm]Parkflyer Switch-mode BEC $19[/url] used to be a popular external BEC for 4s heli's or get an ESC that is 4s ready. Then as long as the ESC stays in spec for Amp draw it should perform just fine ;).
Posted on: 4/5/2009 1:59 PM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8650991
RE: 48 mph rc18t * new record 2s lipo
That's fast enough at this scale ;). I've noticed in those tuned up Vendetta St video's that the front lifts up at speed. Would probably be more stable without the the rear wing pushing down behind the rear axle in higher airspeeds, of course punching more power in will contribute to wheelies.[8D]
Posted on: 4/5/2009 3:28 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8649972
RE: Mamba ESC runs brushed & brushless both?
Yes you can run a brushed motor on the Mamba25 ESC but it has limitations. Read my info [url=http://www.rcuniverse.com/forum/fb.asp?m=8173181]in 2 post here in this thread[/url]. [i] I tried the Mamba25 wired for brushed motors... wouldn't bother unless it's a last resort (unless I missed a trick) as the ESC throttle behaved more like a switch (on or off) and only gives forward, no reverse. Seems to loose power above 50% throttle. Didn't seem right anyways. [/i]
Posted on: 3/25/2009 3:19 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8614124
RE: mamba brushless in a vendetta
Agreed, the 48g Mamba 5400Kv might put out up to ~120 useful Watts before they start to cook, which is fine for a simple solution in a light moderate setup. Otherwise get something bigger ;).
Posted on: 3/24/2009 3:29 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8610428
RE: 41 mph rc18t
Nice one! [8D] Looks about right compared to this [url=http://dhrc.rchomepage.com/RolloutCalc.htm?kv=8000&voltage=7.4&pinion=18&gearTeeth=60&drag=.85&dia=65&mah=910&AUW=600&s=15.00&packv=7.40&time=3.64&transRatio=2.5&redButton=B-Xray1&LastItem=amps&]RC18t calculator estimate[/url]. [;)]
Posted on: 3/20/2009 4:06 PM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8598031
RE: Xray M18T and M18MT RTRs!
If they are not to worn then a washer will do for quite a while but eventually they get so sloppy the straight line steering becomes difficult (after prolonged bashing in dirty streets etc.). Then you really need to replace the arms and balls (3 per arm). Not sure if it's economic to get nickel balls, might as well get a Pro kit and get lots of hop ups in one purchase ;) (15mm longer). I managed to scavenge enough to change all the arms and balls on my Hummer basher this week (from last year's action damage) but I have a pretty large amount of spares and bits to draw on.
Posted on: 3/20/2009 3:56 PM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8597998
RE: Mamba 25 Programming Help
> do i say no on the controller twice by applying full brake then apply full throttle for yes to choose value 3) ? yes that is correct. I run option 1 for street bashing ;). > what amp should i discharge the the lipo battery and what amp should i charge at ? 11.1v 1350mAh 25C Please read up on [b]lithium cell safety[/b] before you make any mistakes. 1C (1.3A in your case) is the recommended charge rate with a dedicated lithium cell charger that has the right characteristics for lithium cells (different to the old NiMh stuff). 25C indicates that 25x1350 = ~30A is the max safe continuous Amp draw (if you believe the pack claim) which you will struggle to pull in that setup for more than an instant anyway. A 3s pack is considered flat and requires a recharge at 9v under load (when you feel the Mamba25 starts clipping the power on hard throttle starts). After that, going below the 3v/cell loaded threshold will probably damage the cells.
Posted on: 3/13/2009 3:25 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8573022
RE: MAMBA 25 help
Can't remember exactly. When you power up the ESC you get a little tune. Then when the ESC see's the programmed 0% throttle from the Rx you get the tune again played twice indicating the ESC is armed and ready to go. The tunes/notes are actually emitted from the motor coils by frequency pulsing. Hope that helps a little ;).
Posted on: 3/1/2009 4:34 AM by Author "DarkHorse"
in the forum "1/16th, 1/18th, Mini & Micro RC Cars"
http://www.rcuniverse.com/forum/fb.asp?m=8530621
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