Popular Post jariworsley Posted December 27, 2021 Popular Post Share Posted December 27, 2021 I have read enough of other people's build threads... always appreciated. time for me to put the effort in and document a build myself. in this case a christmas present kit - the Xpress Execute XM1S . I was originally going to go for the shaft driven 4wd Carten M210R but could not find it in stock in the UK in time. The XM1S is a belt driven 4wd m-chassis size kit, builds only as 210mm wheelbase. Chassis only, no wheels, tyres, electrics or shell. https://www.rc-xpress.com/execute-xm1s-1-10-4wd-mini-touring-car-kit-xp-90005-00078753 the UK importers are SpeedRC. I have a mini pickup shell to go with it. Not sure on electronics yet - I know it needs a shorty lipo. Not sure if regular servo will fit. We shall see. Need to work out what motor and ESC will suit. I am happy to wait until later in the build to figure that out. Spent a good hour and a half over lunch time building this while the rest of the family built lego... I am only just finished with page 1 of the build ... who knew assembling turnbuckles to the correct length could be so time consuming! Small box - much smaller than the tamiya. Box contents chaotically laid out, plus some tools to build. What is needed for page 1 - small bits from lots of bags. and at least one thing I could not find at all. there is supposed to be a tool to help with the turnbuckle building. Cant find it at all. There is a turnbuckle wrench but... using spanners instead. And this is it for all that effort. my son has built the marvel lego from one of the pics already. I am.... only just off page 1. All turnbuckles built to length (tried to get them within 0.1mm). I used some left over tamiya grease on the threads to make them easier to adjust. Found that for final adjustment if I use two spare 3mm tools through each end I can hold the links in place and turn the turnbuckle more easily. I also found that... - my eyesight is rubbish for some of the instruction manual (phone on 4x zoom is my friend there). - its possible to get a blood blister when trying to get ball ends in to the new rod ends... - it seems to take longer than I thought to get this done. at this rate I'll be finished by the end of january... - so. many. small. parts. .. going to have to get organized or I will lose something. Next is a start on the diffs - gear diff at the rear and spool at the front from memory. 4 Quote Link to comment Share on other sites More sharing options...
Bajadre Posted December 27, 2021 Share Posted December 27, 2021 Quote - its possible to get a blood blister when trying to get ball ends in to the new rod ends... now that feeling man your fingers ach for days lol great start brother !! 👍 Quote Link to comment Share on other sites More sharing options...
jariworsley Posted December 27, 2021 Author Share Posted December 27, 2021 some time with scriptasylum and the gear ratio chart at the back of the manual... kit spur is 96T. I bought a set of pinions 41-45 - looks a good choice. transmission ratio is 1.9. so with 42t pinion as "the answer" 😉 and a 3600kv motor I get 40+ mph top speed. That's a good starting point I think. Differential Ratio: 1 Transmission Ratio: 1.9 Other Ratio: 1 Spur Tooth Count: 96 Pinion Tooth Count: 42 Total Voltage: 8.00 Motor KV: 3600 Tire Diameter (inches): 2.2 Tire Ballooning (inches): 0 Motor Current Draw: 0 Motor Coil Resistance: 0 Spur/Pinion Ratio: 2.29 : 1 Total Ratio: 4.34286 : 1 Tire Circumference (inches): 6.91 inches (175.55 mm) Rollout: 1.59:1 Total Motor Speed: 28800 RPM Vehicle Speed: 43.4 mph (69.72 km/h) Effective KV Value: 3600 KT constant: 0.38 oz-in/A Motor Torque: Amperage not specified... Final Torque: Amperage not specified... Final Power: Amperage not specified... 2 Quote Link to comment Share on other sites More sharing options...
jariworsley Posted December 29, 2021 Author Share Posted December 29, 2021 A little bit more to show for today. rear gear diff, front spool and centre layshaft done. gear diff is all composite. time will tell how it holds together. components of the bags. bearings are all in same bag but separated out as needed. no idea what the small ones are for yet, but they are the cutest small bearings ever. Dry fit of gear diff. normal stuff including 5000cst weight oil for the assembly. steel for the drive cups on the gear diff. Spool and gear diff together. Spool much quicker- in this case with composite throughout. on to the centre layshaft. 64dp spur , 96T. goes together easily as well. All three done. on to the steering assembly after this. 2 Quote Link to comment Share on other sites More sharing options...
jariworsley Posted January 7, 2022 Author Share Posted January 7, 2022 More progress and less documenting. I have got as far as the shocks to build. Starting to very much come together: before arms As it stands today. I did have some errors building - there are three different lengths of grub screw in the kit... and I used the wrong ones when assembling the hubs. I used the 3mm long ones. There are both 3 and 4mm in the kit. 3mm are used for the antiroll bars. 4mm for the hubs. Aside from that it is going together well enough. Need to get the shocks built and last few pages of build done. I need to choose a low profile servo to fit the steering and servo gubbins properly. and I need a shorty lipo pack. so this is stalled until I get servo and battery sorted. Recommendations aside from the obvious savox low profile ? 3 Quote Link to comment Share on other sites More sharing options...
PraetoR Posted January 12, 2022 Share Posted January 12, 2022 Lovely build 1 Quote Link to comment Share on other sites More sharing options...
jariworsley Posted March 20, 2022 Author Share Posted March 20, 2022 Finally nearly finished and driveable. Splendid mistake with the shocks so had to rebuild. Really enjoyed putting this together. Electronics are used and out of another touring car. No reverse . Not sure if that is a possibility on this ESC. I do have a weird road test problem though. Steering was super twitchy. I have turned down the expo on the steering channel and that has made it slightly better. Not fixed it And under hard acceleration it pulls to the right. What might I look at for that.pulling under acceleration? 1 Quote Link to comment Share on other sites More sharing options...
froggy8 Posted March 20, 2022 Share Posted March 20, 2022 1 hour ago, jariworsley said: Finally nearly finished and driveable. Splendid mistake with the shocks so had to rebuild. Really enjoyed putting this together. Electronics are used and out of another touring car. No reverse . Not sure if that is a possibility on this ESC. I do have a weird road test problem though. Steering was super twitchy. I have turned down the expo on the steering channel and that has made it slightly better. Not fixed it And under hard acceleration it pulls to the right. What might I look at for that.pulling under acceleration? very nice build mate 🙂 it sounds like torque steer. maybe try thicker oil in the front diffs. Quote Link to comment Share on other sites More sharing options...
jariworsley Posted March 20, 2022 Author Share Posted March 20, 2022 Thanks. I think I need a more open space to test it. Goes like stink. But I have only tried on front of the house. Too many parked cars and curbs. Nice idea on torque steer but it has a front spool. Only diff is at the rear Quote Link to comment Share on other sites More sharing options...
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