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Honza

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Everything posted by Honza

  1. Honza
    @Kalamity I pointed out battery placement earlier I hope that XV02 won't have differential casings molded in chassis, so it can be modified like the 01 I built similar chassis layout for my TB03, even with overdriven front diff - it handled well
  2. Honza
    There must be always one stupid thing on every Tamiya. This time, it's a high CG battery placement 😀 Otherwise, looks good. Rally chassis, Mid-front weight distribution, Shaft drive, Long dampers, it checks all boxes for me. That spur cover looks like it could house a differential. Optional ofcourse, it's a Tamiya after all 😀
  3. Honza

    TRF420X

    Honza replied to Zealot's topic in General discussions

    I'd say both is true. X4's biggest issue is the upper bulkhead clamp. It's quite thin in the top part and that's where it bends when force is applied through the top arm - in most crashes however, forces go through the bottom arm, which might be reason why they didn't catch that during crash testing. Same thing with the steering links. What I really didn't like was how X-ray handled the situation. They could ignore the problem or face it, both would be fine. But they did something in-between - replacing the problematic part with reinforced spares, without changing teir PN, so old parts won't stay in a warehouse. Also, they announced that there won't be running change to the kit parts, but there was - ofcourse that change was less substantial to reduce costs.. That have me impression that they care more about profit than about their customers, which doesn't go that well with their "premium luxury product" marketing.
  4. Honza
    Yes, they have different L/N parts, the arms and dogbones are about 6mm longer.
  5. Honza
    Yes! I own a Cordoba (although newer, 6L model), so it'd be nice to have the WRC. Also, polycarbonate 257mm 037 and S4 would be nice. Like this one? 😁
  6. Honza
    As a Czech and rally fan, I'd like to see some Škodas. It's brand with long history of rally racing, so there's something for each Tamiya rally chassis: 130RS and LR for the M06 or MF01X (rear engine, 2,4m wheelbase and 1,6m width of the original means almost perfect fit, although standard scale would be nice, too) Favorit and Felicia for the M05Ra Octavia and Fabia for XV01 That's never gonna happen, but one can dream, right?
  7. Honza
    Yes, this was carried over from the Evo. Gear case only had one bearing, if they wanted 3-piece propshaft, they'd need additional support - which they did (and I haven't noticed that until now ), but without the 3-piece prop. Yes, less enclosed, looks lighter but not as fragile as the 05. Perfectly balanced in my opinion
  8. Honza
    I prefer the TB03 - it looks even sleeker and more modern, only downside are the laydown shocks - I prefer normal shock tower of the D variant.
  9. Honza
    @Juhunio thanks Here, people had lot of issues with TB02 in rally races (bumpy track probably made the chassis flex a lot more), I've even seen DIY 3-piece shaft on one car.. it is weird that Tamiya never made this option. Btw, nice build
  10. Honza
    Now looking at this photo, have Tamiya ever released 3-piece driveshaft for the TB02? Looks like the chassis is prepared for that and I know that 1-piece design could be an issue on that soft chassis.
  11. Honza
    TA-series were belt driven since the 03. TB was originally released as a rally chassis, while TA was more focused for track races (especially with 04 and 05, which were low cost variants of the TRF414/5). Then, with TB Evo, TB became second onroad line - shaft drive had an advantage in low power classes, because of lower friction, TB02 was low-cost variant of the Evo3.
  12. Honza
    He has TRF dampers, so it's not quite comparable - TRF dampers have smaller holes and tighter gap between the plate and shock body than CVA, so 250 might feel even thicker.
  13. Honza
    Funny thing, a lot of people here drive rally cars (scale stage race) weighting around 1500g, some even getting close to 2kg. Larger weight seems to affect suspension in a positive way.
  14. Honza
    From your picture, it seems that difference is at least 5mm. The TD4 is compatible with TA06 gear diff, so I guess that ball diff width on bearings is more or less the same. Different shims will make 1mm difference. However, TRF201 has steel outdrives, right? They shouldn't wear that much and rest of the diff should be same or at least compatible.
  15. Honza
    I meant distance of the 1015 bearing from "plate" Pictures are from TD4 and TRF201 manuals (sorry for quality I'm on a phone)
  16. Honza
    It's quite common in higher end kits - here's TRF420 manual for example:
  17. Honza
    Sorry, earlier I read that you bought the TRF diff. Looking in the manual, TD seems to have offset bearing on one of the diff outdrives, so it's quite interesting that it fits, but the gear diff doesn't. Anyway, great project
  18. Honza
    TD4 is designed to fit the TA06 gear diff, so its ball diff will be probably wider, too.
  19. Honza
    These look like the longer variant of reversible arms, are 44mm swing shafts long enough with these?
  20. Honza
    Awesome, TB03 has special place in my hearth, as it was my first proper Tamiya kit. But I never got budget to hop it up like that. I nearly forgot that TB03 originally came with that 2mm screw and tiny lock nut. Terrible design, it never held settings for me. 2,5mm works much better. I also switched to TRF502 gears with 12 balls, it made the differential a bit smoother even with plastic outdrives. I noticed that you didn't use aluminium rear shaft (54053), is it not available anymore?
  21. Honza
    TT0x has a 3-piece driveshaft, with slight axial play - so no force is transmitted between front and rear. Even if it was rigid, it'd probably never cancel out the axial force, because one end typically transmits more power due to weight shift. So you can remove driveshaft without worries However, it'll only work on high grip surface - RWD needs more rear-biased weight distribution.
  22. Honza
    TL-01 was my first rally car, not bad, but it has too short front arms, so front geometry is weird once ride height goes up. It's better with long span suspension. Exposed motor isn't ideal either. Knowing its drawbacks, I built my variant of "TL02", based on MF01X with centre motor. M05 - even worse geometry... TA02 - well, this car won several titles in Czech rally championship (althought heavily modified) so I'd say it's pretty good. TT02 - its suspension isn't good for large travel.. S variant might be better.
  23. Honza
    https://m.youtube.com/watch?v=AmEaNAwFSfI&t=0s I think it's well explained in this video. It doesn't cover all use cases, but I think that for arms and similar parts, 2-3mm wall thickness and minimal infill is best balance between strength and weight/print time. Ofcourse, there are instances where larger area of higher infill will help - especially for compressing/tensional force. Infill pattern will change how it behaves under compression and tension - 3D shapes like cubic or gyroid will have more uniform properties in different directions
  24. Honza
    Congrats on getting a printer I recommend to take a look on CNC kitchen YouTube/webpage for interesting videos about print, materials and post-production methods. He often tests how different settings can change behaviour of prints, for different materials, especially strength in-between layers. One advice - don't waste time and material on 100% infill - in most cases, it's not necessary, as most load is taken by shell anyway (you can see that on lot of Tamiya's designs), also, it makes prints more sensitive to over/underextrusion. I usually just increase perimeters count and play around with modifiers (I use Průša Slicer) to increase layer area with full infill, where needed (there's also setting that does that automatically).
  25. Honza
    Not only in US, their distribution is weird here in CZ, too. They have official distributor here, but lot of parts is unavailable, especially ones for more serious kits. Mid range kits like TB05 or M07 concept, that don't come with body, are not even listed on distributor's site... And no mention that TRF even exists.
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