Marui Hunter - My first buggy... Found one to restore :-) - and a Galaxy RS too :)

[silvertriple]

To late now if you've made the order but I noticed you can get SLS printed PP now , probably ideal for bumpers, cages and suspension arms .

Depends where you get it done probably. I saw the announces for Weerg but they are basically alone to propose this I believe (like the white PA12 by the way)... It will be for another project, I guess...

[silvertriple]

The Hunter 1/10 project is awaiting the prints from the provider to be done...

Time to work on the half size target.

I found some universal joints on amazon which may be able to do exactly what is required (search terms : universal joint 1/28 rc, and then I focus to find a 3mm to 3mm. Found 2 different type of dimensions, and the short ones are actually almost 1/2 size of the real Hunter joint).
https://amzn.eu/d/a6MyICK

That should make the job. I also ordered some brass rods in 3mm diameter length 100mm. This should be easy to work with using rudimentary tools...

Last I started the real thing.
Took Fusion 360 and included a derived Hunter chassis which I scaled down to 1/2 of the original chassis. I then started to pull the servos in to see what it would take in terms of adaptations...

The first conclusion is that unless we cut the servo or enlarge the chassis, the Mini sized servo won't work.


And then the conclusion is that we will have to work with the micro sized servo...


For the Motor, after some search, I identified a Mini28 combo with a motor which is more or less 1/2 the size of a 540 motor, and that would do the job. I'll have to order one later on.

I also received a sub micro linear servo, which is very small and could do the job for the 1/32 sized hunter...

[silvertriple]

I may have gone a bit too far regarding Hunter parts testing...



Even though I ordered powder based process prints, this is not at loss : The idea is really to show that FDM printing is possible and it will allow me to show how the final result is different in the cults3D publication of the parts... Further, those FDM printed will serve also as showcase and will replace a current set of parts exposed in my usual hobby shop.

[silvertriple]

Not much done on the Hunter side those days. I'm awaiting the printed parts and they should come to my door within next week. The rest was about searching hardware and solutions for the reduction. I've not started to adapt the 1/2 size chassis, but I'm close to start this.

This morning, however, I made a mould CAD model for the Hunter bodyshell. This will be used only for the half size Hunter. I've deliberately not marked the motor cut as I'll need to adapt this to the targeted motor. Once the bodyshell surfaces are done, pulling a mold from it is easy : it's just additional work.


The target is to print this scaled 50% and work it out from there... The wing mold was done quite a long time ago, and was probably the first time I did while starting on the bodyshell components...

[Dadio]

I've used a lot of those sub micro Linea servo's in micro helicopters , they really don't take much abuse but there are normal servos for micro helicopters too in some very small sizes .

[silvertriple]

I've used a lot of those sub micro Linea servo's in micro helicopters , they really don't take much abuse but there are normal servos for micro helicopters too in some very small sizes .

So far, among my searches, I did not find smaller than the micro sized servo which is pictured before the linear server. If you can point me to smaller one, I'd love to see a link...

[Dadio]

https://www.ebay.co.uk/itm/225883701675?itmmeta=01HT5BSQR9GX7QCWWNZQ6QRZD3&hash=item3497b7c1ab:g:kuYAAOSwrbdlXrvH&itmprp=enc%3AAQAJAAAA4OLjI0RvubawM3p5yJPCC86ElAb%2BG5I1GAmivpB2mVnJ4kt42ZJ9FVjJ206TE2Nwx%2FCjLSosSQsQYqyBuX3pfO5euFmoLjYGWqxL4aBQolDi3CgxhBYjLSkRSNtxR976tax1IvLa%2BZDIANpDLERODo1pZjHVNjLc8IJaauUDz1b%2BD4PzaP1kLdAjFvfzsSzzjXs4101tzZ20LFq9V6d0JbQpsu6S9WJiw1CJxz7MVqQAS7nkH6qWWIgFY05QmAu%2BxKBoXC2NIvtknfiGLWvn3Tp7RZXzxpPM23yySsJnMJT4%7Ctkp%3ABk9SR5785qvRYw
This one has the size on the pictures but you can get them cheaper if you search xk k100 servo .not much smaller but 2 or 3mm might make a difference at this scale .

[silvertriple]

Thanks, I had a look, and it is apparently same size as my micro one. That will work for 1/20, but I do think the linear one is likely the only solution for 1/32...

[Dadio]

Thanks, I had a look, and it is apparently same size as my micro one. That will work for 1/20, but I do think the linear one is likely the only solution for 1/32...

At 1/32 it might be strong enough , the arm on them is pressed onto a threaded brass collar that moves up and down the threaded shaft , what happens (with helicopters) in a crash is the plastic servo arm pops off the brass collar, you can press them back on but the grip diminishes each time , the impact when a helicopter "runs out off sky" is pretty high though , probably at 1/32 scale it should be more gentle . I may have some of the linear servo's laying about so don't spend money yet as you can have them if I can find them .

[Dadio]

Found these , two linear and one really tiny normal servo .

[silvertriple]

Seems you have everything to start a "small" project

[silvertriple]

The printed parts arrived today...


There is everything to build the Hunter prototype, except the wing I Intend to print in TPU...
Black parts are MJF, White SLS, grey SLM Stainless Steel

The chassis is black, like the roll cage (which I will probably paint but not sure which color yet)


The motor covers are in both 380 et 540 versions...


And the gear cover are in multiple parts (the second base is on the chassis with the roll cage)


The white parts on the first picture are going to be dyed in a clear color which is still to be defined, and the gear sets are not a novelty...

[silvertriple]

There was one thing I never took care of any of the Galaxy and Galaxy RS... I did it today... Number pannels are 3D printed.






I'll also have to take care of the Galaxy RS (blue)

[silvertriple]

I made a modded roll cage to allow the usage of the Monoshock in prototype configuration...


I also spliited the cage to allow printing on small beds, with possibly less use of supports... The split is done right at the end of the front part and will be hidden at by the bodyshell. The plan is to use 2 2x12 mm pins to join the splitted parts with a bit of glue... The rear part can even be printed in flexible material to protect the wing support...

[silvertriple]

Some of the elements of this project materialised today with an package directly coming from my friend Johann from down under...


I checked, and the size is no good


Well, that was expected anyway . At the end, the small hunter is something I have in mind for later (have sourced all hardware I need, but some specific parts need very manual and dedicated work...


On the other side, what is really important at the time is the arrival of the Prototype bodyshell : this means we will be able soon to pull the Hunter prototype model in real...