Honza
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Posts posted by Honza
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4 hours ago, DTSCB said:
How did you build this? In the Japanese blog, the slipper plates weren't tamiya and had round holes (vs the oblong shaft hole in the XV-02 one). Wouldn't that mean the slipper plates will just spin on the slipper shaft and the only thing linking rotational force is the spring?
I didn't build it, I just found the blog. 😃 The slipper pads do have flats, they are just not as pronounced as on Tamiya parts.
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All the red parts (except for stock uprights) were needed to make somehow decent chassis. Of course front CVDs and some modifications to improve turn radius, ball bearings and oil shocks are necessary upgrade.
The issues I had and solved:
- The rear was too heavy especially with short lipo. The new motor position is also considerably lower.
- gearing taken from TL-01 didn't really fit M-chassis - the longest stock gear ratio is slower than slowest M-05. And the speed tuned gear set doesn't engage entire teeth.
- it's nice that it supports square lipol without need for option parts, however, the holders don't work well and keep battery exposed. On a narrow rally chassis... It's worse with short packs, which cannot be even secured with stock holders.
- I just couldn't find spring combination that would work well with stock front axle and had to use water-like oil to get soft dampong.. I had to redesign front arms, which helped, but I'm still not happy with it.
- this is not exclusive to MF-01, but the front "bumper" is a joke.
In the end, it cost$ about the same as XM-01. And although I have some criticisms towards XM, as a rally chassis it's the better option.
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Looks awesome!
30 minutes ago, ChrisRx718 said:This chassis is screaming out for carbon fibre shock towers, the profile is incredibly similar to those on the XV-02. I did check, but you lose the rear body post mounting on XV-02 carbon shock towers - although the profile looks like the front one would fit. C'mon Tamiya, hurry up and release them so I can plough further unnecessary money into this thing!
Until now, I didn't even realize that XV-02 uses bodyposts in the bumper.
Looks like the RS Pro shock towers are closer in geometry to the XM ones. Of course they are only sold in pairs, so you'd end up with two unused towers, if you wanted to use rear tower for front axle.
30 minutes ago, ChrisRx718 said:The universal driveshafts were strange too - they used retaining spring clips in lieu of the more familiar grub-screw arrangement of the old M-03 universal driveshafts. Not sure whether that's an advantage or a cost saving? Who knows. Certainly makes them a bigger PITA to build vs. the grub-screw versions.
These have been in use since TRF417 - in fact, XM-01 uses the same wheel axles (hint for DCJs 😁)
I prefer them over grub-screws since there's no risk of the grub screw becoming loose. Never had problem with them, just make sure that the spring clips are oriented properly, with the loose end pointing opposite to the direction of rotation.
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1 hour ago, vodka said:
If you can't tighten the spring with the nut, it's pretty useless.
You can - there's a tube that goes through the bearing, which transmits force from the nut to the spring. It's quite limited range, but you could increase tension by adding inserts between the spring and tube.
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9 hours ago, jsven008 said:
and an optional slipper clutch.
Found out, that TT-02B can have a slipper as well. I wonder why there isn't an official Tamiya part, seems like XV-02 slipper would fit after couple of modifications to the spur shaft...
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24 minutes ago, jsven008 said:
-02B Total Cost:
$115 for kit on Amazon.
+$135 for similar hop-ups.
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$250 Total
For that price, you can get TT-02BR, which comes with sealed diffs, CVDs, aluminium shocks and other hopups. At that point, I'd say it's better car than DF-03, plus it has better parts availability.
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On 6/14/2024 at 3:57 PM, skom25 said:
Is it good car park basher? Ride height is more or less like TT-02 or typical track race cars?
It is more track focused car, but the long arms allow for some extra ride height after some modifications, plus you can get uprights from XM-01 for extra ride height setting.
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On 6/13/2024 at 11:52 PM, jsven008 said:
and with very limited steering. Sure you can remove the steering bump-stops, by why are they there to begin with?
It was the same with DB-01. The limiters are there, because the base version ships with dogbones, which have quite limited steering anglem. Once you get CVDs, you can remove them. Or play with them as a setup feature.
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I released some magic smoke today
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Great, it'll be nice to see a full option variant 😁
17 hours ago, ChrisRx718 said:There's no part# yet for a set of alloy servo mounts, but they're very similar in profile to those for the TD2 / TD4 (#22030). This isn't listed as an official part however.
I'd guess they'll be same as XV-02, as most of the other parts.. but it is weird that they're not listed as an option (and that it came stock with XV-02)
17 hours ago, ChrisRx718 said:I have a front one-way (intended for a TT01, not sure if it will fit)
It should fit, it fits to TT-02, but the short outdrives might become an issue.
17 hours ago, ChrisRx718 said:also fitted the front and rear lower arms at this point; the kit contains a lot of plastic spacers
which you cut from sprues. I measured these and used the equivalent 3mm alloy spacers instead.
This is something I hate about Tamiya.. You lose a spacer, look up the manual and description says just "A15", because it comes from a plastic tree.
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On 5/25/2024 at 10:05 PM, JimBear said:
Does anyone know if the re-re Fiat Abarth body would fit on the M-06 chassis?
Just saw this in a Facebook group:
And found some older photos from build:
As expected, some cuts have to be done.. but they can be masked by the engine model.
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From the series "why Tamiya haven't thought of that?", I finally tried whether I can run a single propshaft for multiple wheelbases, since my design allows for the propshaft to stick out of the bevel housing - this is an L propshaft on M wheelbase. In the same way, M-propshaft could be used for the shortest wheelbase.
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11 hours ago, Wystan Withers said:
34mm... so methinks a TRF416 M-Four just slotted itself into my To-Do list this summer
I'm afraid that's still a bit too wide, if XM mounts are 32mm, you'll need around 24mm to fit between the arms (assuming the arm end is 8mm in diameter). XV-01 gearbox, which is designed around those mounts, is 20mm wide.
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8 hours ago, Wystan Withers said:
Anyone bored enough to measure the distance between the suspension pins for me? Got a whackadootle idea in my head...
I cannot measure, but if this guide is still correct, for XV type blocks, the widths are as follows:
XJ (all except the inner rear) - 34,75mm
XM (inner rear) - 32,5mm
XH (the adjustable option) - 36,25mm with center blocks, each position changes width by 0,75mm, narrowest setting being XJ equivalent.
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3 hours ago, chris.alex said:
The XM-01 Pro manual is now available for download on the Tamiya Germany website. You can find it in the download area further down the page:
Awesome, and it's a vector file, that'll be useful
2 hours ago, Alex97 said:I've been playing around with a few different mud guard designs to offer more protection and be a little bit more robust.
It looks nice, but does it have enough space above the wheel when it's compressed? It looks lower than the stock guard. Also, it might be good idea to keep it more open on the rear, to reduce build-up.
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15 hours ago, Mad Ax said:
Or does anyone know what model the flat D type came on?
M-05 came with flat D type differentials and outdrives, using same plastic gears as M-03. The 54477 TT-02 outdrives should fit as well.
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Not my favourite shop, but I ordered there once and they were quick and I had no issues. This looks like GLS goof.
That being said, I looked through reviews on their FB page.. and the lack of communication is quite common theme. The e-shop is side hustle of large PSA/Toyota/Hyundai dealership's owner, so it probably doesn't have high priority in terms of man power and customer support.
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3 hours ago, Alex97 said:
They've also listed the M07 hubs and compatible @Honza!
Cool, thanks for the info! Now I wonder who's gonna make the first M-07/8Ra? 😁
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We hit a big milestone today, with prototype of functional belt drivetrain on a full-scale XV-01 chassis.
It wasn't build by me, but by a friend, who had parts lying around and was kind to send me these pictures for sharing.
He has been interested in mid-motor conversion for some time, which actually gave me the idea for this whole project. I got some feedback on the model, luckily only minor tweaks were needed to get it working.
I was happy to see that the stock motor plate fits perfectly. I just need to model a spur cover.
Using stock tensioner assembly with 630 bearings, belt is quite close to the motor, but it doesn't rub even with loose belt. In the case where vibrations would cause contact with the motor, larger bearings can be fitted to keep the belt further away from the motor.
Now I need to get TD-4 bevels and counter shaft for the shaft driven drivetrain
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Thanks, I'll check them out.
1 hour ago, Alex97 said:Carten also offer another M chassis rally tire however they are hard to get in the UK.
I've seen those, but I think they are more for dirty asphalt, than dirt track
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5 minutes ago, Alex97 said:
They are half the price of the Tamiya ones and hook up pretty well. I used them on my micro buggy when racing on astro and they provided very good grip.
Thanks! Did you compare them to standard or soft Tamiyas?
There were rallyblock clones a few years back that were even softer and gripped extremely well, but they disappeared and I'm looking for a replacement since then... Tamiya soft blocks are pretty close, but something softer would be even better.
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@Alex97 I'm glad I'm not the only one who finds Tamiyas 60D tires less than adequate. 😁 I made similar tires out of old worn out rallyblocks, but they are still superior.
What tires are those? They look like they have same thread as Tamiya, but different sidewall?
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13 hours ago, Trini2DBone said:
Okay thanks again! Will pick up a set of the TA02 arms then, or if I can get a used chassis reasonably cheap, I’ll probably go that route as it should have everything I need including the shocks and axles.
I'm not sure if TA-02 arms can be flipped around, I remember reading something about collision with motor.
Tamiya did make a 251mm WB option, but that was TA-02 chassis with TA01 rear arms swept backwards.
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22 hours ago, ThunderDragonCy said:
That's a real mashup! It is a top force carbon chassis, which uses same gearboxes as the TA02, but it has had M chassis arms grafted on so it's super narrow. You could pretty easily build a carbon chassis TA01. You will need the TA02 arms sprue, but just mount the rear arms swept forward, and some 39mm universals or driveshafts and dog bones all round.
Those shocks look dubious too so maybe a set of CVA super mini shocks as well?
Those aren't M-chassis arms, the shape looks similar to the standard TA01 arms, they just have more material on them, which makes them look shorter.
The main difference here are uprights and very thick hexes. I guess wheel axles are quite long and will need replacement aswell.
Talk to me about the MF01X Please!
in General discussions
Posted
One positive thing I forgot to mention about MF-01X is its flexibility. The simple shaft and range of chassis inserts allows you to set up any wheelbase from 170mm to infinity and beyond 😃 and I'm not exaggerating (a photo I found on Facebook)
Its compatibility with old stile Tamiyas adds range of compatible suspension widths from M-chassis to buggy, which makes it a great platform for non-standard bodies.