Project Mulligan

hi neil/all...funny you should say that cause i was just reading up about bevel gears before i turned on my laptop, talking to redshift reminded me to look up various types of cuts to bevel gears and so far ive not found any type that looks like a traxxas diff pinion (im shure this is why they fail so easy-along with being mounted in plastic).

well to cut a gear i would need it with the teeth on so no good sending it to me worn with a few teeth missing. need to find the module of the cog and a good external diameter measurement also helps. so how small are we talking? have you got a diameter?

bevel gears are a little more tricky and time consuming to make. also may have to purchase a cutter (depending on module and how many teeth this gear has), are yours diecast? there will be a visible line around half the gear if so, horibble grey soft shite. probly wont put up with brushless on 5s mate

and whats all this talk of fish n chips and angel delight, is bad enough having to look at all those shiny new bits. if i want the munchies neil, ill watch the cooking channel

[suicideneil]

Yeah, diecast for sure- I know they wont last too long, but it'll be a blast while they do

As for size, I dont have an exact measurement, but there is a good picture on page 7 of the manual:

http://www.tamiya.com/english/rc/rcmanual/txt1.pdf

Just to make things harder, they are splined on the inside, so a new shaft with maybe a cross pin to hold the gear in place would be needed- I can foresee that getting rather expensive and complicated with all the tooling and setup required..

I think I'd be inclinded to go with rc4wd.com Kyosho Madforce axles, then get some insides from donar axles/ spare parts etc.

I would have thought though that Tamiya woudl have released a TXT-2 by now- been a long time without a big, straight axle truck from them...

[doo540]

Neil
I just had to post some pics of my TXT-1 with the MMM installed and running. I just hope the MMM can keep up with 2 (2s 5000 30c) in parallel lipos and 2 540 brushed motors. lol I hope you find some stronger axle gears because I have Neu 1527 1.5d (1500kv) that needs a good home. BTW this is one of two TXT-1 that I own, same setup on both trucks. If you look close you will notice that I'm running the truck backwards (lipos in front). Still testing to see if I like that way. Truck has some nasty body lean/roll without the sway bars installed too. I hope to get my extra frame on the CMM machine this week or early next to start designing a longer frame for a extended wheelbase truck.

yes, so i see...well the pin idea is possible as id have to fabricate cutters to do a spline which would get expensive, plus i dont have access to a shaper (just to add insult to injury), which is a machine that is really good for cutting internal splines.
both cogs are different sizes too , it gets worse .
shame a few savage diff gears or 8th scale buggy diff gears would not work see how you go with the brushless mate...

its not 5.43 in the morning, im not that sad. its 10.44 lol.

[suicideneil]

Hmm, I actually wonder if 1/8 diff gubbins might work- it all thats required are a couple new shafts that are cross drilled for a pin, then it might be worth exploring- the other main gears would be much easier to do... much much easier.... hmmmmmmmmmm.....

Well, anyways, I got the slipper parts from modelsport in today, just gonna send another email to Bizzare hobbies to get an update on my missing axle guard thingies.

hi all/neil...silver steel is ground stock (to a fine finnish) nice and straight and has a bit of carbon content so it can be hardened when machining is complete. it's available in 4,5,6,8 mm etc and its 8.00mm dead on so bearings fit sweet hmmm...

[suicideneil]

On that vain/note, I looked up the bevel gears- they are 15 & 18 tooth, probably Mod 1 though no real way of confirming that at present (might be able to compare it to a mod 1 pinion gear from my old emaxx tranny- the 1st gear pinion on the input shaft). Now, if I do some digging I might turn up something suitable, so who knows, might be able to bullet proof the TXT-1 drivetrain just like the savy and maxx...

On a seperate note, I have my Kershaw, hobbycity and ebay (tranny parts) orders inbound; the fecking Turnigy servo that was out of stock when I ordered just came back in stock- 2 days after I decided to go ahead and order anyway. Nay bother, I'll get it next month, just annoying really...

hi all/neil...well its like this if the 18t gear is around 20mm daim (at the large end) then its p.c.d will be around 18mm, p.c.d is around halfway between the top and bottom of the tooth, so to find the mod we divide the number of teeth by the p.c.d, so no prizes for coming up with the answer of 1 .

would be good to bullet proof the diffs but i have seen others who have mm combo in there txt-1 so must be ok as long as you're not landing big air jumps with the throttle open.

[suicideneil]

Alrighty then, pictures:



Thats the Hobbycity Flightmax 5000mah 40c 5s lipos, and a butt load of the EC5 connectors. Im liking the connectors so far- quite stiff, but a nice positive action to push them together & then pull them apart. Also easy to solder & assemble. So far the lipos have only been charged & balanced, no runtime yet, but we'll see what happens in the next ~3 weeks I have off (may rig up and adaptor so I can use them on the Gmaxx).













XTM Mammoth 1/8 shell. Based on the F350, looks the mutts nuts, and fits like a glove over the extended TXT-1. For $35, its a bargain too.





In case you're wondering about size, the XTM shell swallows the t-maxx shell and TXT-1 shell whole, its rather quite massive and looks silly even on my Gmaxx; definately only for BIG trucks...

[Krawlin]

It's huge! (That's what she said....)

Looks great though. Ever consider using some wider axles, something like Kyosho Twin Force axles (I think those are wider)? Might be better for your servos so they wouldn't have to swing those heavy tires with them so far from the knuckle's pivot point.

[redshift]

Thank you Neil, for not posting pictures of the following:

The tracking # on your monitor.

The mail truck arriving.

The postman walking to your doorstep.

The box itself (at least 3 angles).

Opening the box.

Just want you to know, this doesn't go unnoticed, and thank you.

Looks BEEFCAKE!

Weight Gain 4000 is helpin'me bulk up

[MetalMan]

Ah that Mammoth body is nice - I've got one or two laying around for my Savage. But as you may have noticed it is quite thin, so when it's mounted make sure to use body washers! Otherwise it tears easily...

shoo-goo and drywall tape!

[suicideneil]

Not man-goo then?

I have concidered wider axles yes- RC4WD.com sell aluminum Madforce axles that I've been eyeing up for a long time- they are about 14" wide I think, so they would give me roughly the same width I have now, only without having to use 2 sets of widers. $99 an axle which isnt that bad really, just have to find some donar original axles to get the diffs/ dogbones/ knuckles from- or buy new parts from the re-released Madforce..

I have noticed the shell is a bit thin yeah, I have drywall tape actually, will just need to pickup some shoe-goo or something similar; just thinking about a paint job at the moment, really have no idea what to do besides a chrome grill & bumper areas.

In the mean time, I've hashed out a plan for mounting the tranny- its so small compared to the 3906 version that the normal method of using L shaped brackets would look a bit messy, like having a shelf sat inside the chassis rails. Instead, gonna do something much like this:

**insert picture here if I can ever find it again**

The tranny is mounted to the centre skid using 4 standoffs, like its on stilts essentially. What I will do is use a sheet of metal or lexan between the centre skid and underside of the chassis ( to replace those little plastic spacers ), then mount the standoffs to that- saves hacking about my lovely NewEra centre skid.

hi all...neil that body looks good and well in proportion to the wheel arches and the front width, just cant help noticing the bad front body mounting.
just a small hill for you to climb.....looks great neil.