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-   -   Here's an idea, a Brushless HPI Baja SS! (https://www.rc-monster.com/forum/showthread.php?t=9544)

bigandy 01.14.2008 05:07 PM

Here's an idea, a Brushless HPI Baja SS!
 
Evening folks.

I have just spent a couple of hours working on building my HPI BajaSS kit together, and I am at the stage where I am ready to start bolting the engine in. In light of my brushless CRT.5 conversion I have also started, it got me thinking (You can guess what is coming next right?!).

Has anyone tried building an electric Baja?

It would solve a lot of my problems, in that it would open up a LOT more sites for bashing (many ideal sites are limited due to noise issues). It would also be a very impressive demonstration of my liking of all things electric!

I'm going to crunch some numbers at work tomorrow, to see what sort of motor would be required/fit with the minimum number of modifications, and the sort of power requirements such a conversion would dictate. If anyone has any ideas, I'd love to hear them!

Cheers
Andy

_paralyzed_ 01.14.2008 05:21 PM

finedesignrc.com does one with an 8hp 3040 lehner motor on 10s(37 volts!)

wallot 01.14.2008 05:56 PM

what about a big outrunner as RPM of the gas engines are quite low. something that gets half the baja weight acrobatic plane moving

lutach 01.14.2008 07:18 PM

I've seen somehwere a guy in Germany had a bid outrunner in his 1/5 scale car. He was using the Schulze 40.160 and I think 10S lipos. Plettenberg made the Bolido specially for 1/5 scale and the motor's shaft is made to fit the 1/5 scale pinion gears. I was thinking of doing one of those 1/5 scale 4WD cars, but the company in Asia that makes a copy of the MCD still didn't say if they will send me the kit.

squeeforever 01.14.2008 08:27 PM

I would go with the Bolido personally...

BL_RV0 01.14.2008 09:44 PM

check out this stuff
https://www.unitedhobbies.com/UNITED...idProduct=5139
https://www.unitedhobbies.com/UNITED...idProduct=4691
2 of these
https://www.unitedhobbies.com/UNITED...idProduct=4289
thatll get ya movin.

BP-Revo 01.14.2008 10:59 PM

I'm not sure about that ESC and those batteries. That motor looks like it can do the job though....7000w! The Bolido is rated at 5000w.

Personally I'd go with a CC Pheonix HV110 for ESC duties and power it with FlightPower 4500mah 30C packs...

If you do decide to do a Lehner 30 series, I'd go with a 3060 rather than a 3040...just because lol...

t-maxxracer32 01.14.2008 11:27 PM

ya those seem really crappy bl_rvo. then again thats why they are so cheap.

BL_RV0 01.15.2008 12:04 AM

well to get ya started..... yno...

aqwut 01.15.2008 01:12 AM

Quote:

Originally Posted by t-maxxracer32 (Post 141132)
ya those seem really crappy bl_rvo. then again thats why they are so cheap.

Actually, they're not crappy at all... I don't know about their 7000 Watt ratings... but I guess we'll see how well they perform on 12S Lipo (Firehammer M/T) and 14S2P A123 (BlackJack 55").. I'm sure the Bolido is a much better motor... but that cheap $150 motor won't be shy on performance.... :rofl:

nl12 01.15.2008 11:01 AM

First decision to be made is motor brakes or mechanical brakes, then you can narrow down your avalable controlers, then decide what batterys you are going to use (I think this is the most important decision) then based on battery selection you can further narrow your controler options, then you are left with a motor choice. I would choose between the big Neu, Lehner 30 series, and possibly the Bolido. I would use no less than 10s lipo.

austinmaxx 01.15.2008 12:34 PM

just saw this i had asked in question eariler about my baja... will the electric setup match my 6-7hp 29.5 fully ported reed modified motor? Seems the batteries might cost a fortune...

lutach 01.15.2008 12:53 PM

Initial investment is high, but it does pay off in the long term. A good motor like the Lehner 30 series or Plettenberg Bolido will make what ever modified gas engine look weak. Keep in mind electric motor is more efficient then a gas motor. Electric motor have instant power, makes more torque and some can spin up to 50000rpm. Run 2 6S packs ranging from 4500mAh to 5000mAh+ in capacity and your BL Baja will be really fast.

austinmaxx 01.15.2008 04:38 PM

wow the big neu's are 995 ouch...

lutach 01.15.2008 04:43 PM

The 2215 seems good and Neu might drop the prices after they decided not to have a distributor.

aqwut 01.15.2008 05:32 PM

the LMT 2280 on 12S is able to push it without a problem... I had a 26cc Sikk City modified to 7.5 HP... and for brushless... to match the power/speed of a Gas 7.5HP you probably only need 3000-4000 Watts....

Just for the heck of it... I'm gonna put a KB45 on 12S 25C 3700mAh into my Firehammer and see how well it performs... I'm only say this because my 12XL is able to push an 18Lb Monster truck without a problem.. and the baja is about 21 Lbs... my Firehammer is 21Lbs as well..

Do you guys have any idea what pitch the 1/5 scale uses?...

tashpop 01.15.2008 08:58 PM

you know i seen some rtr brushless 1/5 scales the other day. i think carson or carlson or something like that was building them. cheap too. ?$800 or somewhere close to that. they had a buggy and a onroad car. anyway, i'm posting this because they may have your pinion you need.

cembom 01.15.2008 09:16 PM

Why not take a smaller car and use the elecs? Like a 1:7 4wd. Alot cheaper and more fun lol. So aqwut are you actually saying you have that big outrunner in a firehammer?

lutach 01.15.2008 09:23 PM

I waited until this link was working: http://www.megamotorsusa.com/Brushle...-50.htm?id=642

What a work of art. I might just go for it.

nl12 01.15.2008 09:40 PM

How much does a baja weigh without the engine and gas tank

zeropointbug 01.15.2008 10:30 PM

Personally, I have recently calculated the approx. cost (not including little odds and sods) to built a Baja buggy with enough reliability, runtime, and power... the cost came to over $3000. This is using such components as a Neu 2230, a decently sized A123 pack that would have at least 7000watts capability, i can't remember which controller I priced in, but expensive none-the-less.

In time, I might attempt one of these... and when I have more 'surplus' budget.

It would be a sight for sure! :yes:

aqwut 01.16.2008 10:17 PM

Quote:

Originally Posted by cembom (Post 141297)
Why not take a smaller car and use the elecs? Like a 1:7 4wd. Alot cheaper and more fun lol. So aqwut are you actually saying you have that big outrunner in a firehammer?

It's in the process of going into the firehammer... I need to build a special mount for both ends of the outrunner shaft to compensate for the vibration and bounce when jumping....

rhylsadar 01.17.2008 04:33 AM

hi

i have thought of converting one of my large scale models too for some times.
personally i had thought of a 3040 lehner or the bolido with the big schulze and a small watercooling system. in contrast to the nitro models the cheap gasoline for the largescale makes it harder to convince onself that it such a great idea to go electric. furthermore one of the features i like most with the big models is their runtime of 40min with one tank. so i guess i would want the electric car also have runtimes around 30min. that takes quite some batteries.
however i have abandoned the idea so far. but who knows. to see my fg mt going as agressive as a bl savage or stampede would sure be awesome though.....:whistle:

bye
rhylsadar


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