MY turn to Ask the QUESTIONS

[Serum]

Topic moved to general questions.

[glassdoctor]

Like Brian said the calc program is simple math. You can do the same thing with pencil and paper.

With a known kv of the motor and the voltage of the battery, either measured or estimated realisticly... you can get very close to actual speeds achieved.

The only thing you can't easily account for is the losses in efficiency of the esc and motor. If you assume a 20% total loss that's probably close in most cases.

I'm guessing most of the time that the calculator is off it is due to guessing the voltage drop wrong, or the kv of the motor isn't exactly what it's rated. For example Castles motors are not exaclty as they are labled... 4600 is not 4600kv but it's close to that. And the voltage while at top speed can be tricky to guess...

[jollyjumper]

Originally Posted by crazyjr

The reason i mentioned the diffs so much, is because i got friends who race XXX-T's and with stock (old style)ss5800's, they rebuild their diffs every 5 runs, because from the 6th to the 8th run, the diff will fail

i havent had my diff fail and i have about 25 runs with higher power then a 5800ss
i do however have the mf2.
my diff is still silky smooth.

[Gustav]

I love the MF2,a 2wd electric stadium truck is hard to beat for fun,low maintenance and low running costs.i think they're perfect for someone who wants a fun basher but doesn't have a huge amount of time to put into RC,plus they're relatively easy to achieve very high speeds from.And they're pretty hard to break compared to a MT.And they handle so well,a good MF2 is a joy to drive(kit settings are pretty dialed since it's a Losi).

I do need to do regular diff rebuilds though,any mistake adjusting the diff when you're running a lot of power and the diff gear will melt,not just too loose,if it's too tight it will over heat when it diffs out.that said,diff gears cost pennies and it's a very quick job.I have a 7075 hard anodised diff gear for the genII tranny if i can figure out the diff ball size it uses.I always carry a spare complete tranny when i run anyway,and rebuild the other one later.once you get the knack of building the diff and adjusting the diff and slipper they last fairly long though.

here's mine after a winter overhaul, all ready for spring time:024:

If it's a 1/10 4wd there's not too many options(unless you want a buggy) other than the MT2 18SS,which are great but are tight for space,conversions are usually an excercise in packaging.

the schumacher havoc is 2wd 1/8 truck that has a bullet proof ball diff and transmission,i've always thought someone should convert one of those.

[hyperasus]

MF2 good basher? not as hard to break as MT? Low maintenance and running cost?

I don't know about all that. Sure not the experience I've had with my XXX-t trucks. In fact I find it to be the complete opposite. XXX-T are good for racing and racing only. They handle good if you know how to set them up right(hard to do). They are also very fragile and really not all that cheap to maintain compared to pede/rusty.

[squeeforever]

I kinda agree. The XXX's aren't very durable. I think they are rather easy to setup, though that was my first RC so I dunno...I got use to it pretty fast.

[Gustav]

I was talking about 1/10 stadium trucks in general,rustler included,in comparison to MTs,it's just i happen to run that one so i gave it as an example.i find them extremely durable,owing to the fact they weigh next to nothing,they don't have the inertia to hurt themselves very often.drop a spider from a second floor window,then an elephant and see who comes off best.Durability is a prime concern in racing too.As for XXXTs only being good for racing,well i have a blast with mine anyway.I still think a 1/10 stadium truck is cheaper to run than and break less than a MT,and less time consuming,some more than others naturally,like you say the traxxas trucks since they have that bit of flex.having the planetary diff and not a ball diff should make for less maintenance too,can't go wrong with the rustler/pede for lot's of reasons,availability of parts,cost of running,maintenance,durability,fun etc.

[JAM]

Well here's the deal guys.....Mr1st (user name here) is offering me a 06' Rustler with stock TX and a MM 5700 with ESC.....I will not get into the details of the deal. But I think it's a really good deal. It should be a good little test bed and a great way to get the kid into a BL set up. The only thing that worries me is that he isn't responding to my request for his address.

[JAM]

Well after finding out where MR1st is located (Somewhere in the Middle east, he wouldn't be specific) And this has nothing to do with him personnaly it's just that At this time and point I will not ship or receive anything from that region of the world........and the same goes for most carriers. So the deal is off and my search continues.