Please help support RC10Talk.com!
Donate towards my web hosting bill!
Any contribution helps!!

Repro Protech 4 body (wide problem)

The place for all things Yokomo...

Moderator: klavy69

Post Reply
User avatar
prp
Approved
Posts: 847
Joined: Sun Dec 10, 2006 9:27 pm
What was your first real rc car?: Sand rover Tamiya
Location: Lyon FRANCE
Contact:

Repro Protech 4 body (wide problem)

Post by prp » Sat Dec 31, 2016 1:46 pm

Hi guys
I remember a post on, but I can't find the post , on some trouble with the wide of the undertray TBG
and the chassis wide on the 870c...
Thanks for help Pierre PRP

User avatar
scr8p
Site Admin
Posts: 17489
Joined: Wed Feb 08, 2006 2:46 am
What was your first real rc car?: Tamiya Midnight Pumpkin
Location: Northampton, PA
Contact:

Re: Repro Protech 4 body (wide problem)

Post by scr8p » Sat Dec 31, 2016 1:54 pm

I had a problem with mrlexan's 870c undertray that seemed to be just a tad bit narrow for the chassis. His was a reproduction of an original. I'm pretty sure TBG's is a reproduction or mrlexan's reproduction so I'm sure it worse.

Peakey
Approved
Posts: 658
Joined: Tue Feb 25, 2014 8:55 am
What was your first real rc car?: Tamiya Bigfoot
Location: Nottingham, UK

Re: Repro Protech 4 body (wide problem)

Post by Peakey » Sat Dec 31, 2016 3:52 pm

Try Steve (Penguin bodies) on eBay he's made a new mold and they seem to fit better than the TBG ones

User avatar
tamiyadan
Approved
Posts: 1972
Joined: Wed Apr 07, 2010 8:45 pm
What was your first real rc car?: Big bear
Location: New york USA

Re: Repro Protech 4 body (wide problem)

Post by tamiyadan » Wed Jan 04, 2017 3:32 pm

FYI all the reproductions are narrow. mr lexan, Penguin that other one that starts with a W or M i can't remember are all not great, TBG are the worst versions.
TBG they are warped and really narrow, like he pulled them off the molds way too early before the lexan cooled.

the others are better however if you really want it to fit well you will have to narrow your chassis about 2-3mm, especially by the front elbow.
otherwise it will fit so tight and narrow that the paint will just come off the first time you push it on the chassis.

Peakey
Approved
Posts: 658
Joined: Tue Feb 25, 2014 8:55 am
What was your first real rc car?: Tamiya Bigfoot
Location: Nottingham, UK

Re: Repro Protech 4 body (wide problem)

Post by Peakey » Fri Jan 06, 2017 11:23 am

tamiyadan wrote:FYI all the reproductions are narrow. mr lexan, Penguin that other one that starts with a W or M i can't remember are all not great, TBG are the worst versions.
TBG they are warped and really narrow, like he pulled them off the molds way too early before the lexan cooled.

the others are better however if you really want it to fit well you will have to narrow your chassis about 2-3mm, especially by the front elbow.
otherwise it will fit so tight and narrow that the paint will just come off the first time you push it on the chassis.
When did you last try a Penguin one? I ask cus he's made a new mold recently and said he's added some to it to make it fit properly, I've got one but as yet haven't tried it yet but it's not destiny for a 870 anyway

User avatar
tamiyadan
Approved
Posts: 1972
Joined: Wed Apr 07, 2010 8:45 pm
What was your first real rc car?: Big bear
Location: New york USA

Re: Repro Protech 4 body (wide problem)

Post by tamiyadan » Fri Jan 06, 2017 4:05 pm

about a year ago, so i didn't know he made a newer mold. i guess you will be the beta tester :D

Peakey
Approved
Posts: 658
Joined: Tue Feb 25, 2014 8:55 am
What was your first real rc car?: Tamiya Bigfoot
Location: Nottingham, UK

Re: Repro Protech 4 body (wide problem)

Post by Peakey » Fri Jan 06, 2017 5:39 pm

The one that he's selling on eBay now is the latest one and I think he said he added about 3mm to the mold. He's been telling me about the molds used and he thinks that TBG must use fibreglass as they shrink with the heat.

User avatar
tamiyadan
Approved
Posts: 1972
Joined: Wed Apr 07, 2010 8:45 pm
What was your first real rc car?: Big bear
Location: New york USA

Re: Repro Protech 4 body (wide problem)

Post by tamiyadan » Fri Jan 06, 2017 6:01 pm

with TBG no,

I've spoken to the owner directly.

TBG use plaster molds,, but they have made copies of copies.

When they pour to make the mold they use the body cavity itself. this undersizes the mold from original. there are a bunch of factors why but you can lose over 1mm of dimension. so TBG might then get a Copy of a copy and pour that to make a TBG mold. thus you could be 3mm or more undersized.

you lose more and more detail with a copy obviously it gets more washed out and shrunk.

what should be happening really is the mold poured then an artist should go back and touch up the copy mold clean it up and build it up and recut all the details, then another mold made and another pour done for the final.

now i have seen this done professionally. the easy way, they pour the copy, it is touched up some material added and details are gone over with clay tools to sharpen everything, once complete i have see them shoot high build primer over the cast and go back and resand between coats, i has also seen where they cast the mold and then pour a layer or two of plaster of paris over the top and let it settle then go back and touch up for the final re-cast. that ensures the original dimensions come back and the detail is present. of course this is much more expensive and takes longer then just pouring plaster inside a lexan body cavity for re-production.

now today it would be possible to 3d SCAN a body and then adjust it inside computer modeling software, then a 3d print can be made and sanded to be used for production, this is expensive now but in the future will get cheaper and more cost effective then using plaster or fiberglass.


there is also Special resin designed to shrink or grow proportionally for mold making. this stuff is pretty cool you can either put it in a dehydrator to shrink or hydrate to grow it has a certain range of grow and shrink so you do either then repour another mold from the material to start the process again depending on how large or small you need to go. it is used big time in slot cars where S scale is shrunk to HO scale for production. like going from a 1/24 model or diecast to a T-jet.

User avatar
prp
Approved
Posts: 847
Joined: Sun Dec 10, 2006 9:27 pm
What was your first real rc car?: Sand rover Tamiya
Location: Lyon FRANCE
Contact:

Re: Repro Protech 4 body (wide problem)

Post by prp » Fri Jan 06, 2017 9:16 pm

The Mr Lexan mold is the original of the Protech IV body ?
I'm a little lost...

User avatar
scr8p
Site Admin
Posts: 17489
Joined: Wed Feb 08, 2006 2:46 am
What was your first real rc car?: Tamiya Midnight Pumpkin
Location: Northampton, PA
Contact:

Re: Repro Protech 4 body (wide problem)

Post by scr8p » Fri Jan 06, 2017 11:21 pm

Mrlexan made a mold from an original under tray. Oldrc.com bought his molds and they can be bought on their site.

User avatar
RC10th
Super Member
Posts: 2581
Joined: Sat Feb 16, 2013 2:51 pm
What was your first real rc car?: RC10
Location: Australia

Re: Repro Protech 4 body (wide problem)

Post by RC10th » Fri Jan 06, 2017 11:27 pm

I know a guy who 3D printed a 1/10 truck cab mold for a commercial project and it was about $3,000 on a high resolution printer.
I was old school - when old school wasn't cool !

User avatar
tamiyadan
Approved
Posts: 1972
Joined: Wed Apr 07, 2010 8:45 pm
What was your first real rc car?: Big bear
Location: New york USA

Re: Repro Protech 4 body (wide problem)

Post by tamiyadan » Sat Jan 07, 2017 6:10 am

mr lexan was a copy of a copy.

his was ok, it was a tight fit, then TBG made a copy of his copy of a copy,,,etc...

TBG was buying mr lexans re-productions and then selling them for less then mr lexan which lead to a war a few years ago.

Then there was the EBAY crackdown on re-productions and Tamiya lawsuits, where everyone took down copies and manual scans because Cease and desist letters went out.

that lead to basically nothing sold on ebay for like 6 months.

then everyone forgot about it and some sellers made websites to sell off ebay and some went back on ebay, as nobody cared anymore. slowly manuals went back online and then new technologies came out for decals and slowly re-production decals came in that were better then OEM spec.

User avatar
mrlexan
Site Admin
Posts: 8471
Joined: Wed Dec 06, 2006 11:49 pm
What was your first real rc car?: Tamiya Subaru Brat - 1983
Location: Upstate SC
Contact:

Re: Repro Protech 4 body (wide problem)

Post by mrlexan » Sat Jan 07, 2017 12:49 pm

tamiyadan wrote:mr lexan was a copy of a copy.
Tamiyadan, that is not a correct statement. Mine were not a copy of a copy. Mine were a copy of an original tray.
I am not here cause I am playing photographer and on my mountain bike.
www.gojammedia.com

Peakey
Approved
Posts: 658
Joined: Tue Feb 25, 2014 8:55 am
What was your first real rc car?: Tamiya Bigfoot
Location: Nottingham, UK

Re: Repro Protech 4 body (wide problem)

Post by Peakey » Sat Jan 07, 2017 7:02 pm

Steves mold (penguin) was made from an original body and undertray he was trying to buy mine off me but I wouldn't sell it him :lol:

User avatar
tamiyadan
Approved
Posts: 1972
Joined: Wed Apr 07, 2010 8:45 pm
What was your first real rc car?: Big bear
Location: New york USA

Re: Repro Protech 4 body (wide problem)

Post by tamiyadan » Tue Jan 10, 2017 7:59 pm

mrlexan wrote:
tamiyadan wrote:mr lexan was a copy of a copy.
Tamiyadan, that is not a correct statement. Mine were not a copy of a copy. Mine were a copy of an original tray.

was the original tray the actual original mold?

if not an original tray is already a copy produced from the mold, and is already degraded. hence a copy made from a first generation tray would be a copy of a copy. now obviously the more copy generations away from the first pull the worse things get.

i have a collection of original late 1980s parma Plaster molds that were used to make bodies but wore out and were replaced by fresher versions. the edges wore out basically but they look nice on display.

Post Reply

Return to “Yokomo Forum”

Who is online

Users browsing this forum: No registered users and 2 guests