Tarmo5 Build, First Run and Initial Impressions

In this video we build the all new Tarmo5 which is a complete redesign from the Tarmo4. Video includes complete assembly plus the initial trial run and my first impressions of the vehicle with some tips for your own build.
RCPrinter Build Kits for Tarmo5 can be found here: rcprinter.com/products/tarmo5...
Tarmo5 Build information can be found here: / tarmo5
Modified steering arm for DS3218 and similar servos can be found on Printables here: www.printables.com/model/3864...
Music from #Uppbeat:
uppbeat.io/t/capturez/shimmer
License code: XXSHJN9PHX8451AI
uppbeat.io/t/capturez/sand-dr...
License code: QMX6R5C3ED4TOIKF

[@Poulpc]

wow that looks really sturdy

[@rcprinter]

She's a beast!

[@Ross_Estuace_Gellert]

FINALLY IT'S HERE 🤩

[@rcprinter]

Better get printing!

[@blubb7711]

I really like the CV joints, I also thought about making some, but I didn´t got the movement angles needed.

[@rcprinter]

yeah they're definitely one of the coolest features of this new car.

[@EngineeringNS]

Great video! I'm glad you got around to making one! I agree I should have made the tolerances tighter. I think my printers are a bit sloppy they are getting old--Its difficult to nail down good tolerances with a design because everyone's printers are different--But I have had a lot of people tell me that they have had the same issue so I am probably a bit too far off to one end of the spectrum. Even your CV axles were way too loose, they are supposed to be a tight fit they shouldn't rattle like that. I guess this is the first time I've gotten to see one of my designs in detail from someone else' printer normally I have to go off of written feedback. Also I should note you're only supposed to use two rods, I have the third hole there, but its not needed--I see now how confusing that must be. But you can slightly reduce the weight by removing the third threaded rod.

[@rcprinter]

Thanks for the help and the amazing design! Many people are going to have a tonne of fun with this thing.

[@iniqy]

The reason I'm not building it is actually that I want to bash, but if this car flips the ESC is destroyed

[@iniqy]

It does look very beefy though, I really like that. The steering links of my (not a Tarmo) car keep breaking

[@matbeedotcom]

Gonna be printing this asap :) I'll be cutting some pieces on CNC though

[@rcprinter]

Nice! Have fun.

[@pioztube]

The car has a major issue: it does not have a differential. Simply putting a bit of strain on the engine can cause the joints to break. Moreover, if you happen to crash into a wall for just a few seconds and keep the engine revved, it can lead to catastrophic damage. This flaw makes it particularly challenging for those without experience in driving RC models, as it's likely to break almost immediately under such conditions.

[@manuelg.1720]

Tiene muy buena pinta. Sencillo y parece muy resistente. No se trata de una evolucón del Tarmo 4 pues no tiene tracción 4x4 sino 4x2.

[@rcprinter]

Agree, its a similar design aesthetic but a totally different animal here.

[@2wheelLove]

One thing that would be cool, to add some bushing counter-bores on all of the suspension components so that you don't have that rod end just digging into the plastic. Or maybe use a smooth shaft with a keeper screw at the end like traditional RC's. Anyways, interesting build. Thanks for sharing!

[@rcprinter]

Nice idea, something to consider for sure!

[@soma_rc]

I wonder how long that ball pivot is going to last. Certainly unique solution 😃

[@rcprinter]

It does seem a bit loose but its easy to replace when it does break.

[@VintageCR]

amazing build brother! now it would be great (and this is just an idea/suggestion) if you could fit conventional bodies on top of it. This 'chassis' provides a stable solution as is, but it also feels 'empty' as is if you catch my drift. its not something negative just something i would love to do with a build like this.

[@rcprinter]

There's a van body that you can print for the top but I'm not certain how it attaches... kinda seems like an afterthought. It wouldn't take too much work to develop a mount for a traditional body though.

[@jstro-hobbytech]

​@rcprinter hey man. Are these your designs? I'd only need the stl files as I have a few k in parts and shipping from the us to Canada for the parts kits costs a fortune. I'd still pay well for the files as I know the work involved in making them. I'm starting a non-profit rc park. I have a 3 month hospital stay coming up and I'd like to get about 10 more rcs built. 5 pairs. So 5 sets of stl files x2 of a price at your rate. I'd post the complete builds to my channel to show everything is on the up and up. Just so you'd know I'm not trying to pull a fast one. I want to have about 30 rcs for people to try before they buy new ones I'd point to your site.

[@a944734]

Is there supposed to be a screw pulling the drive cups together inside the main gear ? Looks like M4 50 or maybe 60 mm but I don't have any like that in the set ?

[@rcprinter]

No sir. They're just supposed to stay in place with the pressure from the TPU driveshafts.

[@torstonvodesil6709]

Dude keep up these rc car builds! Barely any 3rd party opinions on these things

[@rcprinter]

Thanks! Appreciate the feedback.

[@BraydenWolframe]

What is that peice connecting the pinion gear to the motor shaft called? A shaft collar? Ive been trying to design my own rc car and the transmission has been the biggest struggle so far

[@rcprinter]

I believe its called a stop collar.

[@squeekz87]

Awesome video! Would you recommend building the Tarmo5 over something like the Mk Ultra for someone looking to build their first rc car? I'm looking for the most durable option.

[@orange1248]

Mk Ultra is more focused on racing rather than durability, personally I would go for the Tarmo 5 or if you want awd, Tarmo 4 looks great too

[@rcprinter]

Personally I would go for the MkUltra because I love that little buggy but this one is great too. I'd recommend the T5 over the T4 for durability.

[@squeekz87]

Thanks for the info! I'm definitely leaning towards the Tarmo 5 now.

[@rcprinter]

@@squeekz87 Awesome! Enjoy the build!

[@JohnJaggerJack]

Great project, the only thing that i have to remark is you could have spent more time thinking of a solution for a servo-saver linkage.

[@rcprinter]

Yup that'd help. Its not my design though its from here: www.reddit.com/r/EngineeringNS/comments/zvellk/tarmo5/

[@davidjones5684]

Are the black pieces the only tpu parts? Ive seen some builds suggesting printing the suspension arms out of tpu so wondered if you did too or if its just pla?

[@rcprinter]

yup its just the black pieces that are tpu. The arms are all pla

[@davidjones5684]

@@rcprinter cool. And is it a necessity to use tpu for those pieces or just a preference? I have an ender 3 and have yet to attempt printing in tpu.

[@rcprinter]

@@davidjones5684 I would highly recommend them in tpu. I've printed tpu with my ender 3s before without any major issues. Its not as nice as printing with a direct drive printer and you might have a bit more stringing and blobs to clean off but it can work just fine. Don't be scared. I used esun 95a tpu for this which I like because its not as soft as some tpus.

[@rcprinter]

the motor mount was black but its not tpu, its abs for heat resistance but you can do petg as well.

[@davidjones5684]

@@rcprinter thanks for all your help.

[@juniordupera79]

Hi, do you know what size is the steering link or how long would it be? I need to get if I want to get a metal one.

[@rcprinter]

If you download the free files you can measure exactly but the links that go out to the wheels are around 80mm eye to eye.

[@smarupl]

Can you tell me is Tarmo5 good choice for 3dprinted rc car ? Or just for ex. Robak or MkUltra is better ? I wanted to print rc car which is quite fast.

[@rcprinter]

All good choices. Robak and Mkultra are 4wd whereas the T5 is rear wheel drive. I really like my mkultras but the robak is great too and has an all metal drivetrain so its a bit more robust. Maybe build one of each???

[@jspeedrc]

Top👌🏽

[@rcprinter]

✌

[@716koz]

Hi I’m using the same TPU but I’m having a little trouble printing those parts, could you send your print settings as a starting point. Thanks

[@rcprinter]

In PrusaSlicer I'm just using the "Sainsmart TPU" default settings for my Prusa mk3s and then just changing walls/infill depending on the part. No special settings, just that default profile seems to work great.

[@3DFOXCALLSUK]

Looking to order a kit, just got a question, are the electronics plug & play? I’m a 3d printing whizz, but no way am I good with technical electronics or remote controls. If they require some work, do you have a video to help with the electronics? Many thanks! :)

[@rcprinter]

No there is some soldering required.

[@rcprinter]

Its quite minimal though, you just need to solder esc connectors for the battery plug and plugs for the 3 motor leads. Once that's done its pretty plug and play. If you don't want to attempt that yourself I'd recommend just bringing it to your local hobby shop and they can do it for you.

[@justmaemae]

@@rcprinter what size connectors did you use?

[@jeanfrancoisperrin2511]

Hello, I would like to print the Tarmo5 but I cannot find the printing settings, wall numbers, upper shell layer numbers, lower shell layer numbers and the filling percentage. Thank you for your response.

[@rcprinter]

docs.google.com/spreadsheets/d/1a1s7eodWBhlU9FZUoZEDHq--zYOwesbxeX3LxBbktmY/edit#gid=0 just use standard upper and lower layer numbers. All the build details are here: www.reddit.com/r/EngineeringNS/comments/zvellk/tarmo5/

[@meashish]

How does it compare to Robak 2? IMO Tarmo 5 is more accessible since almost all the parts are 3d printed, while in robak 2, many parts like axel and gears aren't 3d printed. I am currently building Tarmo 5.

[@rcprinter]

Biggest thing is that T5 is RWD only and Robak uses a full metal drivetrain.

[@MrLoucash]

Where did you get the wheels and tires? Part numbers?

[@rcprinter]

I used these: www.amazon.ca/gp/product/B09KHM5SHK BOM recommends these: www.amazon.com/gp/product/B014GQMFWY stay under 120mm in outside diameter

[@narenv9508]

What was your total cost of hardware not including the 3d printed items, including motor, screws, servo, esc, and receiver?

[@rcprinter]

I'm not 100% sure but we sell kits here that get you almost everything you need: rcprinter.com/products/tarmo5-build-kits?variant=42857907617953

[@blueechodragon99]

I've built the tarmo 4, and parts break literally every time I drive it, mostly in the drive train. Is the tarmo 5 more durable than the tarmo 4?

[@rcprinter]

yes, its much more reliable.

[@3dLogicPrinting]

what tires are you using

[@rcprinter]

I used these: www.amazon.ca/gp/product/B09KHM5SHK

[@kavithabalakrishnan5009]

What do u use to control it

[@rcprinter]

rcprinter.com/products/flysky-gt5-radio-controller-w-bs6-receiver

[@rickychang7457]

When are u going to restock?

[@rcprinter]

in stock now!

[@aneeshdupaguntla3802]

Hello I have only 10 bearings but I require 12,what do you suggest I do

[@F.l.o.]

Buy more bearings?

[@rcprinter]

We sell a T5 bearing kit here: rcprinter.com/products/tarmo5-bearings and a build kit here: rcprinter.com/products/tarmo5-build-kits

[@aneeshdupaguntla3802]

What is the size of the servo you are using

[@rcprinter]

20kg standard size servo. Its one of these: rcprinter.com/products/20kg-digital-servo-ds3218-with-metal-gears-and-metal-servo-arm

[@aneeshdupaguntla3802]

What diff fluid are you using

[@rcprinter]

There's no diff in this guy. I lubed all the gears with superlube.

[@aneeshdupaguntla3802]

Thanks

[@jstro-hobbytech]

I have to commend the simple yet complex design. Cool rc man. Can i buy the files and source my own hardware? I have so many rc parts and customs rapes me if i order from the us. Im in nova Scotia. I could pp you the money for the files.

[@rcprinter]

The files are free here: www.printables.com/model/348623-3d-printed-rc-car-tarmo5/files All the information on building this project is here: www.reddit.com/r/EngineeringNS/comments/zvellk/tarmo5/ If you find you need anything you don't have lying around we sell kits here: rcprinter.com/products/tarmo5-build-kits

[@vishnusasidharan5128]

Bearing balll is of which size

[@rcprinter]

The designer's BOM is here: docs.google.com/spreadsheets/d/1FiaM-m8IiTzrS4ObYQ_3iOpfYhyfHyuPomcQWNm2htU/edit#gid=0 ... 6mm steel balls.

[@owenminor]

Is there any overall dimensions, wheelbase, width info?

[@rcprinter]

Outside of tire width is 13". Front to back outside of tire length is 16".

[@phd7768]

@@rcprinter can u tell the size of the bearing used and how many of them are there ?

[@rcprinter]

@@phd7768 6802 bearings (15x24x5mm) - 11 are required... Here's a set of 12: rcprinter.com/products/tarmo5-bearings

[@phd7768]

@@rcprinter PLA would be enough like would it be strong enough to bare some rough ramp jump forces ?

[@rcprinter]

@@phd7768 the T5 parts are pretty beefy but PLA is still not gonna hold up in a hard crash. CF Nylon or something like that would be better.

[@phd7768]

What is the size of the bearings??

[@rcprinter]

You need 11 bearings that are 6802 size which is 15x24x5mm. Here's a pack of 12 if you need it: rcprinter.com/products/tarmo5-bearings

[@kennethgomez4315]

I'd like to see this same thing with a bigger motor

[@UnknownNotFound630]

How much did all the parts cost?

[@rcprinter]

We sell kits here with almost everything you need: rcprinter.com/products/tarmo5-build-kits?variant=42857907617953

[@coltonm8623]

3D printed 6mm bearings work too.

[@rcprinter]

They sure would in a pinch... maybe not long term though.

[@coltonm8623]

​@@rcprinter Yeah, I agree. It was supposed to be temporary, but having them greased has kept it going.

[@rcprinter]

@@coltonm8623 if it ain't broke...

[@ahmadfaris8044]

You gonna need some nylon molding to just run the weakest of brushless

[@conorstewart2214]

What are you on about?