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silvertriple

Marui Hunter

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On 5/6/2021 at 1:06 PM, yogi-bear said:

my printer got installed this afternoon. It too about 3 hours to get it out of the box and being able to be turned on. Tomorrow the techs come back and finish it off, so I should have some sample Hunter decals by the afternoon. I'm keen to see how the white ink prints.

Saw your printer in another thread. It looks nice! Curious to see the results of your tests...

I have found an Marui-024 pinion Gear set in a shop in California, and luckily, they ship as well. They are looking to find the other part I've ordered at the same time which seems to be lost at the moment. I've ordered on last Monday on that site randomly appearing on a FB group i'm registered in unrelated to Marui. The guy contacted me yesterday to ask for a few more days to allow time to find it as it is not where they expected... Time will tell.

I've also ordered part on Shapeways, to be able to complete two Hunters. I included in the order a radio box cover. At least this should allow me to take some measurements and rebuild one specially if I can't find an original one.

Also started to look at options for shock tower reinforcement or reparation.

  • For a non broken chassis, I discussed with someone who added a metal sheet linking both shock towers. He is running his buggy time to time and did not break it yet (he did the modification more than 5 years ago and it is still there). The metal sheet is on the front of the shock towers and is cut to sit against the gearbox cover. The purpose is to allow to part some of the up forces when doing jump receptions.
  • for a broken chassis, I believe the best way is to cut the existing shock towers, and combine them with the gear box cover. The tricky this is how to find a way to fix this to the chassis, as I don't think the threads for the gearbox cover are enough to old against the up forces of jump reception: I will need to find a way to fix this at least on the side from under the chassis to have a chance to hold this against jump reception. If you have any idea to propose, please tell me :-)

 

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yeah, fixing those rear shock towers will be tricky. I think removing the existing ones and then using some sort of angled metal bar to give support would be the easiest. Maybe two pieces of angle that sit either side of a shock tower piece that spans the rear, all bolted together. And instead of screwing into the exiting holes, enlarge slightly and bolt through for additional support. You could do that relatively easy in aluminium. The rear screw holes match up with two of the screws that hole the base of the gear cover underneath, so extra long bolts there. Or a slight variation, since I have a milling machine, I wouldn't mind trying one day to machine a complete gear cover and shock tower in one piece out of an aluminium block.

Monday now for white print samples. Went in this this morning for a quick print job, and then to do some test s and ended up getting more work pushed my way.

 

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10 hours ago, yogi-bear said:

yeah, fixing those rear shock towers will be tricky. I think removing the existing ones and then using some sort of angled metal bar to give support would be the easiest. Maybe two pieces of angle that sit either side of a shock tower piece that spans the rear, all bolted together. And instead of screwing into the exiting holes, enlarge slightly and bolt through for additional support. You could do that relatively easy in aluminium. The rear screw holes match up with two of the screws that hole the base of the gear cover underneath, so extra long bolts there. Or a slight variation, since I have a milling machine, I wouldn't mind trying one day to machine a complete gear cover and shock tower in one piece out of an aluminium block.

Monday now for white print samples. Went in this this morning for a quick print job, and then to do some test s and ended up getting more work pushed my way.

 

For today afternoon, I was expecting to have some products to be able to remove paint from the Hunter bodies. Unfortunately, it seems they messed up the delivery, and it may have been lost. 

Small unexpected delay, which gave me the time to think to your great remark on the traversing holes also used for the underside gearbox cover with the broken chassis in hands. I checked on the chassis and it really look like it is a very good option.

py5Ed5c.jpg

  • build a gearbox cover including the shock towers would be quite efficient as we can build it with enough matter in order to reinforce, and further, since it is also linked to the other side, it is also good for effort partitions.
  • traversing screws with nut with nylon to brake them should be strong enough for the efforts. those should be used both on the front and rear gearbox cover. A washer should be used as well on both side to reduce the effort on both top and bottom gearbox covers.
  • at the end, beside cutting the shock towers,  no modification  is required to the chassis

I will need to learn how to use Fusion360 or other similar tool (I would be able to do this on paper easily, but paper doesn't help to do 3D printing :-D).  Give me some time (a few weeks, or months :-D), and I'll have some files to share!

On side note, went to a track with my son this morning, and looking forward to have a Hunter running on the same track at some point!

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Other parts joined the pool of parts I have for the hunterS those last days:

OWuMgU8.jpg

  • 2 chassis. The one with the switch plate damaged is beside this in quite good shape. The other one have two holes in the rear of the gear box and as well one the thread dedicated to the motor mount is damaged (will need to see how I can work those out). And yes, those are black, which means they were Galaxy's chassis rather than hunter (but that is fine as beside the color, there is now difference between a Hunter iteration 2 chassis and a Galaxy chassis). I even like it in black. The first of the two chassis may become a runner..
  • gearbox covers in proper state, again from a galaxy (color is not identical to the Hunter, but that is again ok. We do with what we have).
  • motor mount, idle gear in proper state with very little signs of wear on the smaller gear, idle shaft, and idle shaft lock
  • driver figure (yeah!)

I'm still searching the radio box cover to have one complete Hunter. I saw there is one on ebay, likely damaged, and in any case, no shipping here and too expensive for the state it is...

Few printed parts from Shapeways (gearbox covers, idle gear with ball bearing buckets (for test, not sure how much they are solid), body mounts, idle shaft lock, body mount). The intent is to use those on a runner, not on a shelve one (except for the radio box cover if I can't find one).
Beside this, I also succeed to source few additional NIP parts:

  • Front arm set
  • Rear axle set
  • Front wheels
  • Suspension links

I decided to take those before I was able to unbuilt completely the second (broken) chassis. Taking into consideration of what I have at hands, I'm not very far to be able to build 2 Hunters, And few extra parts would be missing to be able to build a third one
dUlGiGC.jpg

Few learnings: when someone propose multiple NIP parts separately on a site, propose to take the whole is a very good option to get good prices... Specially when this is the last Marui parts the guy has to sell...

EDIT: Funny  and interesting thing, the Front Arm Set - Marui-019 is labelled "For Hunter" and not "For Hunter; Galaxy". The triangles have no damper mounts, like my original buggy... This bag production may have been anterior to the production of the Galaxy (perhaps the reason I got my hands on it now, by the way).

Now that I have brand new front wheels for the shelf queen, I will need to add new rear wheels to the list (I'm not sure I can get old tires that shiny with a resto, but on the other side, I may not be able to find NIP rear wheels)...

I got organized to get a box to do some body cleaning experiments and two bottles of Glanzer, as it could apparently do the job pretty well. If it doesn't work, that will be another story...

I'm still expecting few things to come, but the project could start, but I'll finish the in progress Super Hotshot build first...

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I received today the gears I was expecting to be potential replacement, but the mod is smaller than expected (it was not precised): Ricoh AB01-0174 is not an option. It's too small.

The Super Hotshot build is now finished, which means I the Hunter project is entering it its next phase: my work area is ready for the next build, which means active phase for the Hunter (I also need the room on the shelve where the Hunter is currently sitting to put the Super Hotshot. For next week-end, the plan is unbuild the first Hunter I received. I will be able to sort out parts based on their state and quality and decide what goes with each chassis and estimate how many Hunters I can actually build (if I want to do a third one, I'm already sure I'll be missing a motor mount and universal joints).

Further updates once the project starts...

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Hello everyone!

Operations started today.

I unbuilt the first chassis I found late April. The detail inspection is surprising : most of the screws are just like new. A very few of them are a slightly corroded. It confirms as well the assumption this buggy was very lightly used... That being said, it was probably stored on a shelve in a cave. Plastic parts will need a bit of cleaning, and as well I will need to find a way to remove the remains of the MSC structure...

 

I took a pic today after the end of the unbuilt. I intend to do another one with all the cleaned (or new parts) and the additional parts (the one which were missing at the time I started this thread). 

mmy5yK9.jpg

I won't start the cleaning now. That's the plan for next week-end, unless I find some time this week during an evening to get this started.

A+

Marc

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