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mongoose brushless - 7/3/2008 6:41:47 PM   
fasterrcs


 

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From: denham springs, LA, USA
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has anyone tried one yet i see there out at tower but so far it is only the 6000k i love speed so i waiting for the 9000k to be released. i seen a vid on youtube from novak that said it is 3 cell lipo compatible. does any one have a info on how fast the 9000k will be on 11.1v or if the 9000k will be able to run the higher voltage. i plan to put it in my recoil since the mamba can only run a short time before it gets a little hot to run
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RE: mongoose brushless - 7/3/2008 8:40:33 PM   
Jailbird1818


 

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I have the 9k but I haven't run it yet. I'll probably put it in my 18t this weekend. I'll post back with results.

-JB

_____________________________

I know aluminum is heavier than plastic. If I wanted top speed, I would have gone with a nitro.

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RE: mongoose brushless - 7/3/2008 9:00:31 PM   
dr_kabuboo


 

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I have 3 of the 10.5 systems (7300) and have tried them in my Recoil. The Mongoose doesn't seem to suit the Recoil unless you can find a long boss .5 mod pinion because the .5 mod pinions from Novak combined with the very short shaft on the Mongoose motor means the pinion doesn't reach the spur gear. I have so far been unable to track down pinions that would work anywhere on the planet.

11.1v on a 9000kv motor - are you serious!? Do you know about maximum RPM's etc. on motors? At those kinds of RPM's you tear the motor apart. People usually use high KV motors in low voltage applications such as 4 cell.

The 7300 is very fast with the right gearing in any car. Fast enough for any kind of racing your heart can desire. Unfortunately it seems we won't be able to use them in Recoils unless Novak releases a longer shaft optional motor or someone produces long boss pinions.

(in reply to Jailbird1818)
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RE: mongoose brushless - 7/3/2008 9:01:24 PM   
Jailbird1818


 

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Here's a few pics.







-JB

_____________________________

I know aluminum is heavier than plastic. If I wanted top speed, I would have gone with a nitro.

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RE: mongoose brushless - 7/4/2008 2:46:49 AM   
fasterrcs


 

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already got the motor mount solved so it should fit in great in my recoil. notice the problem when i tried to install the mamba. you just need to be a little inventive and not rely on others to solve your problems [in other words fix it your self] . as you can see i put a 18t motor mount in and also moved the spur gear in front of the bulkhead and locked it . i used a spur gear out of a mini t and installed the ball diffs im ready to go. novak vid on youtube said it is 3 cell lipo ready so i guess it will work fine unless they dont know what there talking about but i bet they do mister dr_kabuboo

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< Message edited by fasterrcs -- 7/4/2008 3:24:14 AM >

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RE: mongoose brushless - 7/4/2008 2:52:11 AM   
fasterrcs


 

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lol to you. all my cars have problem solving mods of some kind

< Message edited by fasterrcs -- 7/4/2008 3:26:06 AM >

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RE: mongoose brushless - 7/4/2008 9:44:23 AM   
dr_kabuboo


 

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quote:

ORIGINAL: fasterrcs

lol to you. all my cars have problem solving mods of some kind


Wow, that makes you super cool in my book.

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RE: mongoose brushless - 7/4/2008 9:46:29 AM   
dr_kabuboo


 

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I dare you to put a 3 cell lipo in your bodged Recoil on a 9000kv Mongoose and do us a 5 min video on Youtube.

< Message edited by dr_kabuboo -- 7/4/2008 9:47:21 AM >

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RE: mongoose brushless - 7/4/2008 5:08:23 PM   
fasterrcs


 

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here is a vid on youtube of the car with a c49200 the most i could get out of it was about 62. the car is for 10 second speed passes. and the goal it to beat a friends tc3 with a o.s. 18 tz hitting almost 80. i will risk burning the mongoose up to show him electric in faster . novak has said it can run on 11.1v so i will try it. and dont GET BLOODY mad you need others to come up with ides to fix your cars sooner or later a fix will come out. you will just have to wait

http://www.youtube.com/watch?v=Q12p5ujuGNo

< Message edited by fasterrcs -- 7/4/2008 5:15:22 PM >

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RE: mongoose brushless - 7/4/2008 5:50:15 PM   
dr_kabuboo


 

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Where did I ask anyone to fix anything? I also didn't say it's impossible to modify your car enough to make it work. Anything is possible. The advice I have given is based on first hand experience - I own a Recoil and I own 3 Mongoose systems which are fitted in various other cars. It's not only that the Mongoose shaft is too short, there also seems to be no pinions available to make it work. The Mongoose is also a 26mm can size motor, its so fat that you have to cut the Recoil chassis to even have any chance of getting it in there. That put's it out of contention for most people who do not want to go and bolt things on or cut things up. So why don't you put your money where your mouth is, buy one, make it fit and prove it can be done and stop being a big mouth about things you don't have first hand experience of?

Just because the ESC is capable of working with 11.1v doesn't mean it's a good combination or that it will last longer than 5 mins. All brushless motors have a maximum RPM rating. As voltage directly effects RPM in brushless systems the more volts you put in the faster the motor rotor will spin. At some point the magnets will break up and kill your motor and ESC at the same time. That worse case scenario - you will also not be able to gear the car to the correct gearing to keep the system cool so if you take a bit of time and read all the stuff already available on the net you will realise that Charlie from Novak has already commented on people killing the 13.5 motor on 3 cell with stock gearing on their first run. Blown ESC's.

When people write recommendations for other people on the web you would hope they would use their brains (obviously not in your case) and think about the advice they give. It's not as simple as 'will it work'. Will it work for what, a 10 second speed pass. Great. If that is what you are after you might just be lucky enough to get away with it, once. Why do you want to risk killing a brand new Mongoose system for a 10sec speed pass when you can buy much cheaper sensorless motors (such as a C4 9200kv) and do exactly the same thing?

You might be surprised that some of us actually use our systems to go racing with. Part of racing is looking after your equipment, setting it up so that it's reliable and then finishing races by which we improve our abilities. Cutting a car to pieces, bolting on alloy bits which affect the handling and then blowing a brand new system is not what I would imagine most people really want to do. Just a select few elite cool dudes like yourself.

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RE: mongoose brushless - 7/4/2008 8:28:15 PM   
purplefish


 

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Hello all,
my first post, and new to RC. I bought a Mongoose brushless system for my Tamiya Mini Fox and foolishly didn't realize it does not come with a battery connector. I have 2 batteries and a charger with the standard mini-connector. I don't have a soldering Iron, but I guess will have to get one. What is the easiest thing for me to do? Can I solder on a mini connector(the esc batt leads look pretty thick), or will I have use a deans or some other connector, and if so what battery/charger can I use? Thanks a lot.

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RE: mongoose brushless - 7/4/2008 8:52:16 PM   
dr_kabuboo


 

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Go with Deans. It's a 40amp system and the stock mini connectors are not up to the job. They get extremely warm and just don't let enough juice through. Deans also has the added benefit that you cannot connect them the wrong way around in a hurry.

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RE: mongoose brushless - 7/5/2008 2:01:10 AM   
calvino


 

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man thats a killer than Novak didn't "think things through" with the mongoose, sounds like a smoking system (i agree, from the pics it looks like a short shaft on a to wide motor )

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RC18T 6800 Sidewinder Micro 2s lipo, 1980 Goldpan (needs electronics), ST-1, Slow Stick $15 outrunner combo 3s lipo †

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RE: mongoose brushless - 7/5/2008 4:31:21 PM   
NovakTwo


 

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It's not so much that we didn't think things through, it's that the potential solution to the problem comes with it's own issues. A longer shaft can create more stresses for the rotor, with the pinion gear further down on the shaft.

I discussed this with our motor designer and he said that there are two ways to potentially deal with the problem. One would be to have our rotor vendor make some (optional) rotors with a longer shaft and the other would be to tool up special, longer, pinion gear(s). No decisions have been made. If any of you Recoil owners have suggestions, let us know. I understand that the Recoil is a 1/14 scale-I believe that we have one on order to do some testing.

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Affiliated with Novak

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RE: mongoose brushless - 7/6/2008 8:25:34 PM   
dr_kabuboo


 

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Awesome news. Personally I believe the motor shaft could be a bit longer without too much hassle, especially considering the oversize front bearing. You only need to add a few mm. Most 3.2mm shaft motors have rotors that are longer than the Mongoose's and they seem to do fine and last as long as any motor. I have an Align 430XL which had a motor shaft so long I had to cut quite a bit off to make it fit in my Vendetta ST.

I have contacted someone about some longer boss pinions in the meantime too but have not had a response yet.

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