Jump to content

Mad Ax

Members
  • Content Count

    6081
  • Joined

  • Last visited

Community Reputation

5561 Excellent

1 Follower

About Mad Ax

  • Rank
    Advanced Member

Profile Information

  • Location
    Lurking among the gothic shadows of Bath
  • Interests
    Streetfighters, motorbikes, fiction writing

Recent Profile Visitors

8781 profile views
  1. While I was in the process of putting everything back together, I replaced the screws for the rear lower links for a single threaded rod with a spacer in the middle and locknuts on the end. This braces the link mounts together and should make it more rigid. After that, it was time to hook up the driveshafts. I had a bit of fun trying to get the stock shafts to fit, but they weren't inclined to do so, so I opened up another cheap aluminium ZD Racing slider from Banggood. For some reason that is beyond the ken of what humankind is meant to have the what of, ZD Racing put their grub recesses in the wrong place so it is physically impossible to run them in phase. I had to file another flat and drill another recess to fix this problem. Et, voila!
  2. To get at the underside of the diagonal brace to screw the bearing carrier bracket on, I had to remove the links for the rear axle. That gave me an opportunity to do something I've been meaning to do since I started on this project. First, I opened the diff cover and pulled out the half shafts. Then I said a magic word and snapped my fingers And hey-presto! The diff is in the other way around. So, if you have an Element Enduro and you want to run a conventional forward-timed motor, don't fret about the silly backwardsness of the gearbox. Just turn your diffs upside down!
  3. Next, it was necessary to drill some big holes and cut threads in them, so I could screw it into the diagonal brace from beneath. The bearing carrier has M2 threads already cut into it, so all I had to do was drill some 2mm holes for the screws to go through. I had to recess them slightly as the finished bracket needs to fit flush on the chassis brace. This was done by convincing my drill press that it is a milling machine for just long enough to get the holes cut. Note that I only drilled 2 holes - I don't think there's enough meat for the additional 2 holes with recesses. Woop! Remember those blind grub recesses I mentioned earlier? Here's me drilling them out.
  4. After a lot of filing and sanding, far more than I wanted to be doing on such a warm day, I ended up with this. Note the filed out recesses at either end to help locate the bracket into the recess in the diagonal brace. Mocked into place (not bolted): It level
  5. This is a lump of 10x10mm square alu bar that I'd kept from another build. It fits neatly into the diagonal brace. To get the diagonal that I needed, I had to cut down through the bar with a hacksaw. In 33 degree temps, this was something of a challenge. This is what I finished with. It's a bit rough as I had to come at it from the other end when my sawblade started going off line.
  6. Updates! It's been a crazy day in the workshop, up around 33 degrees C all day so a pretty sweaty place to be (at least for us soft Brits who typically don't see much about 26 on a good day). With lots of manual cutting and sanding to do, it's been something of a challenge but it's been worthwhile, as I'm running out of days to the Scaler Nationals in October. This arrived a couple of weeks ago, but I haven't had time to open it until today: It's a Lesu bearing carrier. Cheap and delivered fast from Ebay. There's not much to it really - a small but attractive aluminium body, with some nice details, two 540 bearings and a shaft with some E-clips. Here it is slotted neatly onto the diagonal chassis brace that holes the rear link mounts and middle shock mounts. It's a perfect fit here, but it needs to be horizontal, otherwise the UJs won't work. A point to note for later - this is yet another blind-drilled lug hole. I'll need to drill that out later, then... So, we kind of want the bearing carrier to fit here somewhere. I experimented with mounting it under the diagonal, but there was too much stuff in the way (mostly the rear link mounts).
  7. @Superluminal that's pretty much what all the racers said, nobody takes it seriously and everybody has fun. Last winter they raced in the snow, even making a snow ramp. With low-grip tyres it was almost impossible but everyone had fun. Some people don't like it because the bodies aren't exactly scale - they're too short and wide - and perhaps there's fear of the unknown when entering into the 1:8 world, but as a pure smiles formula it's brilliant. Despite the 3S power and motors the size of soup tins, it's nowhere near as fast or frenetic as boosted touring. The scale really makes sense, especially on a larger track like Mendip.
  8. Round 2 was much better, finishing with 10 laps and a fastest of 22.85, finishing second behind 11 laps and a fastest of 20.89. The fastest drivers in heat 3 were in the 18s, so there's a way to improve yet. I improved my 10-lap time in round 3 and took a heat win, with the round 2 heat winner only managing 7 laps, and in round 4 I broke the 11 lap barrier for the win, although my fastest lap was slower at 21.91. With qualifying over, I had earned pole position in the B final, ahead of 7 other drivers. After a close and energetic race I finished the first final in 2nd, just 3 seconds off the win, and in the 2nd final the roles were reversed, with me winning by just 3 seconds. The overall B-group win would be settled by the final final, and I started well but lost the lead, then caught up to take it back, but then I took a tight line across the gravel and dropped a wheel into a dip. I'd been doing this all day, but when it counted most, the chassis caught up on something and cartwheeled the car. I landed back on my wheels and got straight into playing catch-up, but frustration got the better of my and I put down too much power coming off the ramps and span the car. By then it was all over, I had no answer to the pace, and I had to settle for 2nd, one lap down on the leader. But coming 2nd in the B group on my first day with an unknown car really isn't bad, especially as I don't really consider myself that fast a racer, so I was really pleased with my results. Next step is to figure out if I want to do this more often. I'm pretty stacked out until October, but rallycross runs throughout the winter (they even race in the snow), it's a nice drive to the track across the hills, it's closer than most other outdoor tracks, and it finishes early enough that I can go for a walk along the beach before I go home. It's not cheap - a Hyper GT roller is over £200 and then I need some hardcase 3S LiPos and a big power system to go in it, so it could take a few months to save up for everything I need. Still, the guys tell me these cars are indestructible and almost nothing breaks, so I guess it's a big up-front cost but a cheaper formula by day, especially as I'll spend less on fuel than my usual vintage racing, and there's always the option to camp over and have a curry if I feel like it. Loads more pics in this album: https://tcphotos.net/album/biTa
  9. So, how does this rallycross racing work? Is it just like touring, but with weird-looking cars? Well, no. Here's the key differences I can remember: The Start: In their first heat, drivers choose "front or back." There are two lines drawn across the start/finish straight, one ahead of the other. Drivers who choose front start side-by-side on the forward line, drivers who choose back start on the rearward line. In the next heat, the positions are reversed. In qualifying, cars are released together - there's no second-split release. In this respect, it feels more like a race. Passing and Defending: in qualifiers, you are entitled to defend your line. This is different to regular touring, where etiquette is to move over for faster cars. Only in the finals are you obliged to pull over when being lapped. This also adds to the feeling of racing, and leads to some great battles on track. Joker Lap: once per race, every car must take a joker lap. This involves driving a longer section of the track. You can choose when to do this, leading to some interesting strategy calls. Tyres: the tyre is a control tyre, and it's really not grippy. Even with Sunday's high temperatures, it didn't have much grip. Too much throttle out of the bends and the car spins around. There is also a wet control tyre, but this is only used if race control calls a wet race - in this case, everybody must run the wet tyre. So, how did I get on? There weren't many rallycross entrants, so we were split into 3 heats. As the novice driver, I was car 4 out of 4 in heat 1. The tyres really are slippy - most of my first race was spent spinning out of bends. Completely the opposite to 1:10 touring, where the trick is in tuning the grip out, with 1:8 rallycross the trick is tuning it in without making the car so soft it bottoms out on the jumps or astro sections. Getting out of corners basically means getting full straight before hammering the throttle and using the 3S torque to launch the car down the track. Turn-in under power is impossible, it's necessary to hit the brakes to load up the front before turning in, but once turning the cars are very stable. With a lack of grip, the cars don't roll over like 1:10 touring. This is a revelation for me. I find 1:10 so frustrating, to have to limit how hard I can push based on how hard the car will turn before it flips over and rolls off the track. Rallycross is the opposite - turn as hard as you like, it'll either grip and turn or it'll understeer and go wide, but it won't flip over. The flipside is that it will spin out if I throttle too hard on the exit, but that's easier to manage, for me at least. We were all a bit slow in round 1, but I finished out front with 9 laps and a fastest of 24.01, the fastest lap reported was 22.58 (one car had no transponder, so times may not be representative).
  10. I don't know much about these cars, but they're pretty solid in construction. Way more so than a 1:10 Tamiya, which is just as well, as things can get a bit close out on track. Here's a few pics of some other cars in the pits: And a couple of shots of the track, with tyres, cones and ramps
  11. A week ago today, I set out on a little road trip and racing weekend, beginning with a drive down to the Avalon Marshes in Somerset for a pleasant stroll in the summer sunshine, and then along to Porlock Weir for some fresh sea air, with a stop at a restaurant on the way for a light lunch. Then I made my way back up the coast to Weston-Super-Mare, where I stopped for an hour at Uphill Beach to kick along the sand, before getting back on the road again for the 10 minute drive to Mendip RC Raceway, where I would camp for the night. There's a really good curry house a short walk from the track, where I had a fantastic meal while I worked on the laptop. The real fun began the following morning. I was awake early, but the site was still empty so I had a lazy morning waiting for everyone else to arrive. Note to self: there's enough time to head out for a walk before racing starts at 10am! It was a mixed-media meeting, with a busy schedule of buggy and short course racing taking place on the tight little astro track, and 1:8 rallycross on the tarmac circuit. This actually works really well, because there's two different timing systems running, so one track's racing doesn't hold up the other. That means there's plenty of people on site, but not too much hanging around between heats. Rallycross formula uses 1:8 buggies with 3S power, wearing semi-scale touring bodies and non-grippy control tyres. I don't actually have one of these, but Mendip has a club car that can be hired for just £10 per day, so I figured this was a really good way of trying the formula to see how much I enjoy it before jumping in and buying a new or used car. It was gone 9am when the club car handler arrived and signed it over to me. It was already set up for Mendip's general conditions, so all I had to do was charge the battery and go drive. Fortunately I'd remembered to not be a complete noob and bring my charger, transponder and tools, although I had to borrow an adapter to connect charger to battery. With racing beginning at 10am, there wasn't enough time to get out for practice, but I took a moment to check the track layout. The tarmac circuit is big (it was originally made for 1:8 touring), but for rallycross racing several cut-throughs and astro sections are utilised, along with some ramps, to add to the excitement. Here's some pics of my weapon for the day. I think this might be a Ho Bao Hyper GT, or some earlier version thereof:
  12. Happy Friday everybody! Should be (hopefully) a quiet weekend for me. I've been feeling under the weather this week, had a few bits of bad news all land at once leading to an uncertain future. Coupled with continuous bad news in the mainstream media and people losing the plot over on social media, plus another heatwave keeping us soft Brits locked in our homes out of the sun, it's hit my health bad, so this week has been more about surviving than living. Anyway, steps are in place to improve things and I'm feeling a lot better mentally (just waiting for the physical to catch up), I should be able to have a fun and productive weekend. My daughter is away until Sunday afternoon, I miss her when she's gone but I get some time off parent duty. Friday Work from home this morning, very quiet as I'm waiting on other teams and lots of people are on holiday. Mostly keep myself busy with training tasks, and finish around 2pm. I need to pop into town this afternoon to get some new shoes, try to resist popping in the LHS and picking up a feel-good project, I've got way too many projects already and I should be saving the money for parts I need for the 6x6 rig. Try to get an 8 mile walk in tonight, but I'll wait until later when the heat drops, which means I'll probably do the last 3 miles in darkness. There's absolutely no artificial light where I walk, so I might see some shooting stars. Or I might trip over something and faceplant in a cowpat. Saturday Need to fix the seals around the bath. Hopefully not too long a job, but I want to do it properly while I have the time. After that, head up to the workshop and continue with the 6x6 project. Sat eve, cooking some ribs (from a packet) and chilling out with my wife for a film. Sunday In the workshop on the 6x6 build until my daughter comes home, then probably juggle some family duty until she goes to bed. Sink some beers and work on the novel in the evening. Have yourselves a great one, wherever you are
  13. Mad Ax

    Land Freeder

    I've built a few CC01s and never had problems with the rear diff or axle not going together. First there's a few things to check: When you say diff casing, I'm guessing you mean the black plastic axle case, the long bit that the diff and axle shafts go into. If you don't mean this part then please correct me. (At first I thought you meant the diff itself, but that takes 2x8mm machine screws). Also I'm assuming you mean all 8 screws that hold the axle together have this problem - if it's just one or two of them, please update us. Assuming I have the right part, there's a few possible causes. Have a check of each of these. The axle halves are not fitting together neatly Both halves of the axle should snap fully together and be completely closed without the screws in. (OK, it won't stay closed without the screws, but it proves there's nothing keeping the axle halves apart). If they don't fully close, something is amiss inside the axle. Check that all the bearings are properly seated in their recesses, the diff is installed the right way round, the axle shaft splines are fully located into the diff and the E-clips are in the correct locations. Also check the pinion gear is properly seated with its bearings in the recesses. If the halves still won't fit together, check both halves for any flashing, swarf or damage around the bearing seats and closing faces. You should be able to trim any flashing away. If they still won't fit, take pictures and post up here. There's a moulding fault with the axle This would be unusual, as Tamiya QC is generally very good, but it's possible there's something wrong with the part of the axle that is supposed to accept the self-tapping screw. There are 8 screws that hold the axle together and it would be strange for them all to be wrong, but it's worth checking. If you try to put a screw directly into these holes (without fitting the other half), does it fall right in or do you need to apply a screwdriver to get it in? (Don't screw it all the way, remember the top half takes 1-2mm off the total length of the screw so there might not be enough depth to accommodate the entire screw, and forcing it all the way in could damage the thread or poke the screw end out of the plastic). If there is a fault, you'll have to find a replacement part. If it's a genuine fault with the part, your reseller can probably get you a free replacement. You've stripped the threads It would seem unlikely that you've stripped 8 entire threads so bad the screws fall right out, but Tamiya plastics are known for being soft and it's not uncommon for someone new to Tamiya to overdo a screw and pull the plastic out. If there was lots of bits of black plastic when you took the screws out last time, this is likely what's happened. You might get away with some loctite but replacing the axle would be better. Or you could drill right through the thread recess with a 3mm drill and use longer machine screws with nuts on the end, but it seems a shame to resort to a fix on an otherwise new car. You're not assembling the axle correctly It might be that you've not correctly interpreted the instructions. I've built more Tamiyas than I can count and I still slip up sometimes, I miss an obvious part or try to screw into the wrong hole. Take pictures of what you're doing and share them here so we can see where you're trying to put the screws and if there's something obvious that you might have missed. Good luck
  14. It's Friday again! At least, I think it is. I keep losing track, what with it being the summer holidays, my daughter and wife being home, and me taking every Tuesday off. My routine has got completely screwed up, and I'm one of those people who literally stops functioning if I don't have a routine. So, has anyone got anything fun planned? At present, my weekend plans are like this - but as always, they're subject to change! Friday Working from home, finish at 2pm. I actually have no idea how many hours I've worked this week, I've been sat at my desk a lot but haven't had a lot to do. I need to look after my daughter this afternoon, I think we'll start building the Super Storm Dragon I bought for her last week. I was supposed to be having some workshop time, but we had to cancel my daughter's trip to the mother-in-law this weekend as she has been covinated. Tonight I've got to clean out the van and start loading in a few things for tomorrow, charge some batteries (hopefully) and generally chill out. Saturday Usual start to the day, get my daughter up and fed, then heading out on my own for the weekend. I had planned to visit some local nature reserves, then head to the nearest coast to meander through the holiday crowds, but I'm wondering if I'll be bored, so maybe I'll head further afield to a more rugged coastal area and get some proper fresh air away from the crowds. In the evening I'm heading up to Mendip RC Raceway to camp overnight (probably alone). If I get there early enough (and the club permits) I'll test the Revival cars on the astro track. I've got a table for 1 booked at the nearby curry house so I'll probably sit there all night and work on my novel. Sunday 1:8 rallycross racing at Mendip, using the club loan car. I've never done this before, but it looks like a good crossover between touring and buggies. Mostly I'll be trying to stay out of everybody's way. I don't have to take a detour to pick my daughter up on the way home, so I'll take a meandering route back across the Mendips. There's a place that sells really good local ales, plus I'd like to stop for a short walk if there's time. I'm under no deadlines, so I can get back late if I want to. Then home in time for pizza and beers before the next week starts again. Have a great one, wherever you are
  15. Stunning work! Thanks for sharing, it'll be great to see how this progresses. I love how 3D printing has opened up the world for some innovation and new types of home-build.
×
×
  • Create New...