1/3 Scale PK Ripper Project  RSS Feed

#1 2009-02-28 4:33pm

rakas17
Centurion Member
From: London
Registered: 2008-05-07
Posts: 142
Bikes: 2

1/3 Scale PK Ripper Project

I've had a thread running on radbmx.co.uk for a while so I thought I'd share with you lot.

Heres the deal, I'm a model maker and I've restored a few bikes. I've been making DX endcaps for people for a couple of years to help fund builds.

As I'm running out of space and more bikes costs more money I thought I'd make a 1/3 scale model.

I started with the seat and tyre as my theory was that if I could make these two components the rest would be easy as the seat was going to be a bit hit and miss. In other words i had to freestyle it until it looked right and the tyre was also a bit of a headache being that I decided the best way would be to make the knobbles and stick them on seperately.

The seat was made from a vac forming, I had to make a former slightly under sized to allow for material thickness then the shape inside was made. The rails are bent from steel rod and the guts were made on a lathe, I made all the little parts then cut the head off a tiny bolt and put nuts on the ends so it actualy works like a real seat.

This first pic is the former (grey) and the seat.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1440.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1469.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1464.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1474.jpg

Then I gloss lacquared it then masked the sides and matt lacquared the rest.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1923.jpg

http://i21.photobucket.com/albums/b253/rakas17/P1000496.jpg

Next was the tyre, heres some pics of the knobbles being cnc machined. First I had to machine in all the little slots and dots then I turned the material over and machined the scoop on the backs of them with a bull nosed milling cutter so they would sit nicely on the profile of the smooth tyre that I turned on a lathe.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1476.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1478.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1479.jpg

In this one you can see the three different sizes of knobbles on the tyre.  middle, inbetween and outside.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1481.jpg

This is them being stuck on. I marked 80 (I think, I can't remember now) points on the tyre and stuck on the middle ring first then went from there.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1492.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1494.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1493.jpg

After that boring job the tyre was moulded in silicone and cast in black resin. It will obviously have skin walls and logos when the bike gets finished.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1792.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1797.jpg

The skyway was drawn using CAD then CNC machined in 2 halves.  Then it was stuck together and again moulded and cast. The hubs haven't been made yet but they'll come soon.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1438.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSC02100.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSC02101.jpg

The bars were made from brass so that they could be polished and chromed. The crossbar was silver soldered on. They're SE powerwings by the way.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1790.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1788.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1873.jpg

The stem is a TUF NECK and made from ally with little bolts that work as a real one would. The tiger head logo will be lazered or cnc machined on at a later date.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1875.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1876.jpg

The frame and forks were next, I used a green model board which in laymans terms is a very posh mdf.  I made all the section and glued them together then used sculpting wax to make the welds. Then it was all molded and cast.

http://i21.photobucket.com/albums/b253/rakas17/DSC00256.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSC00261.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSC02106.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSC02110.jpg

Heres the dropouts before they were stuck on.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1928.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSC02109.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSC02104.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1880.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1879.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1881.jpg

Heres the frame being cut out of the mould.

http://i21.photobucket.com/albums/b253/rakas17/DSC00030.jpg

This is the frame after getting it out of the mould, you can see how bust up it is and the wax welds.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1929.jpg

This is the resin casting.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1919.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1921.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1922.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1920.jpg

http://i21.photobucket.com/albums/b253/rakas17/DSCF1924.jpg

Heres a pic of some spare castings I've got.

http://i21.photobucket.com/albums/b253/rakas17/DSCF1926.jpg

These are the cranks, they went a funny colour from the heat.

I made them form brass and silver soldered the tubes in, they need cleaning up then polishing then chroming.

http://i21.photobucket.com/albums/b253/rakas17/P1000502.jpg

http://i21.photobucket.com/albums/b253/rakas17/P1000503.jpg

http://i21.photobucket.com/albums/b253/rakas17/P1000504.jpg

http://i21.photobucket.com/albums/b253/rakas17/P1000505.jpg

http://i21.photobucket.com/albums/b253/rakas17/P1000506.jpg

In these latest pic I've sprayed the f+f with 2pac primer.
i've knocked up some makeshift hubs just to get the wheels on for the pics but I'll do the ally hubs soon.

http://i21.photobucket.com/albums/b253/rakas17/P1000494.jpg

http://i21.photobucket.com/albums/b253/rakas17/P1000495.jpg

http://i21.photobucket.com/albums/b253/rakas17/P1000496.jpg

http://i21.photobucket.com/albums/b253/rakas17/P1000497.jpg

http://i21.photobucket.com/albums/b253/rakas17/P1000498.jpg

http://i21.photobucket.com/albums/b253/rakas17/P1000501.jpg
So thats about how far i've got. I've been laid off from work too but still have access so I'll still be able to carry on with it.

If anyone wants to talk to me about doing one for them then I'd love to discuss it baring in mind it wouldn't be cheap as there as so many hours involved. Obviously a bike with the same parts that I've already moulded would take less time than doing one from scratch.

And heres a little advert of my stuff to sell.

http://i21.photobucket.com/albums/b253/rakas17/P1000487.jpg

http://i21.photobucket.com/albums/b253/rakas17/P1000486.jpg

1/3 scale kashimax aero seats.  $9 shipped.

And shimano dx end caps.  $22 shipped.

http://i21.photobucket.com/albums/b253/rakas17/Photo-0025.jpg

This is a pair.

http://i21.photobucket.com/albums/b253/rakas17/CIMG1380.jpg

http://i21.photobucket.com/albums/b253/rakas17/CIMG1383.jpg


Thanks for looking guys, hope you enjoyed the lesson:Dwink

Joe

Last edited by rakas17 (2009-02-28 4:47pm)

Offline

 

#2 2009-02-28 4:37pm

estados
Pro Member
From: Bergen County, NJ
Registered: 2008-07-20
Posts: 1040
Bikes: 3
For Sale
Website

Re: 1/3 Scale PK Ripper Project

dude you got mad skills. that is freaking awesome.... big_smile
you rock, i cant wait to see the final product.
please post more pics.

very awesome stuff... big_smile big_smile big_smile smile

Offline

 

#3 2009-02-28 4:40pm

I am the owl...
Pro MemberSinner
From: Alberta, Canada
Registered: 2007-04-30
Posts: 21856
Bikes: 7
For Sale

Re: 1/3 Scale PK Ripper Project

I cant wait to see the rest. In particular, the headset, brakes, and cranks...


I love dead people....

Offline

 

#4 2009-02-28 4:41pm

estados
Pro Member
From: Bergen County, NJ
Registered: 2008-07-20
Posts: 1040
Bikes: 3
For Sale
Website

Re: 1/3 Scale PK Ripper Project

the mold of the frame, is it plastic??
what other bike will you build in the future??
How many hours did it take you to build just one bike?

Offline

 

#5 2009-02-28 4:48pm

Johnny Wad
Centurion Member
From: Maryland
Registered: 2007-12-15
Posts: 243
Bikes: 5

Re: 1/3 Scale PK Ripper Project

Man, this is incredible work.

I too am anxious to see more pics as you work towards completing the model.

I hope you make your living building models, because you should be getting paid for your talents! Sweet.

Be well-

John

Offline

 

#6 2009-02-28 4:49pm

rakas17
Centurion Member
From: London
Registered: 2008-05-07
Posts: 142
Bikes: 2

Re: 1/3 Scale PK Ripper Project

i've just added cranks, forgot about them:D

Its taken a few hours, I couldn't guess. I've been doing it for a about a year but only an hour or 2 in evenings when I had time.

The mould of the frame is silicon rubber.

Last edited by rakas17 (2009-02-28 4:56pm)

Offline

 

#7 2009-02-28 4:56pm

freedo
White Boy With An Afro
From: Skippack, PA
Registered: 2008-06-17
Posts: 9138
Bikes: 52

Re: 1/3 Scale PK Ripper Project

this is awsome.  any chance you make custom bikes for us?  like my mongoose decade in 1/3 scale?  is it usable?  like finger bikes?


out with the new in with the old!!!!!!!!!!!!!!!!! smile
mongoose decade guru, hit me up with any questions you may have
R.I.P  Autumn Pasquale. May she rest in Peace!
Instagram! @freedo70

Offline

 

#8 2009-02-28 5:01pm

rakas17
Centurion Member
From: London
Registered: 2008-05-07
Posts: 142
Bikes: 2

Re: 1/3 Scale PK Ripper Project

freedo wrote:

this is awsome.  any chance you make custom bikes for us?  like my mongoose decade in 1/3 scale?  is it usable?  like finger bikes?

It will probably be usable but it's a bit bigger than a finger bike. It's actualy a realy good scale, it's in my living room at the moment and looks amazing.

I could do a mongoose decade but it wouldn't be cheap.

Offline

 

#9 2009-02-28 5:02pm

freedo
White Boy With An Afro
From: Skippack, PA
Registered: 2008-06-17
Posts: 9138
Bikes: 52

Re: 1/3 Scale PK Ripper Project

how much?


out with the new in with the old!!!!!!!!!!!!!!!!! smile
mongoose decade guru, hit me up with any questions you may have
R.I.P  Autumn Pasquale. May she rest in Peace!
Instagram! @freedo70

Offline

 

#10 2009-02-28 5:03pm

rakas17
Centurion Member
From: London
Registered: 2008-05-07
Posts: 142
Bikes: 2

Re: 1/3 Scale PK Ripper Project

4 figures.

Offline

 

#11 2009-02-28 5:09pm

LoopDreamz
Expert
Registered: 2007-09-06
Posts: 671

Re: 1/3 Scale PK Ripper Project

Well that is out in left field, in the best kinda way.  Amazing work.

Offline

 

#12 2009-02-28 5:10pm

~PURPLE~FIREFLY~3000~
Centurion Member
From: California
Registered: 2008-09-15
Posts: 221
Bikes: 9

Re: 1/3 Scale PK Ripper Project

Ultra Sweet....!! How about some SE Quadangles...


In the 80's, I was riding the streets with Eric (Hutch), Jamie (GT), Jody (JMC), & Ronnie (Diamond Back). North Hollywood, CA to The Teen Center in Van Nuys, CA. The best LBS was The Pedal Shop, where I bought my first & only JMC frame, forks, & parts for my very first build...

Offline

 

#13 2009-02-28 5:18pm

pjcruiser
Pro Member
From: Bend, OR
Registered: 2005-07-31
Posts: 4684
Bikes: 13
For Sale
Website

Re: 1/3 Scale PK Ripper Project

keep us updated!!  that is one of the most amazing things i have ever seen on here!!


"HOME OF THE FREE... BECAUSE OF THE BRAVE!!"

"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting 'what a ride!'"

"Dream as if you'll live forever. Live as if you'll die today."

Offline

 

#14 2009-02-28 5:18pm

bmxghostrider
Pro Member
From: Washington
Registered: 2007-07-24
Posts: 3642
Bikes: 10
For Sale
Website

Re: 1/3 Scale PK Ripper Project

Next to a real bike that is the coolest thing I have seen since I got back into the BMX hobby.. Above Excellent WORK. Couldn't even imagin the hours put into that...

Offline

 

#15 2009-02-28 5:24pm

psychoduddycycles
WAYYYY in the red since 1983
From: New Orleans, LA
Registered: 2006-12-31
Posts: 9437
Bikes: 9

Re: 1/3 Scale PK Ripper Project

Far out!


My signature doesn't define me.

Offline

 

#16 2009-02-28 5:28pm

pjcruiser
Pro Member
From: Bend, OR
Registered: 2005-07-31
Posts: 4684
Bikes: 13
For Sale
Website

Re: 1/3 Scale PK Ripper Project

i just sent an email to the past and present people involved in SE to check this out (Todd Lyons and Mike Devitt.)  Honestly I think everyone should see this!


"HOME OF THE FREE... BECAUSE OF THE BRAVE!!"

"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting 'what a ride!'"

"Dream as if you'll live forever. Live as if you'll die today."

Offline

 

#17 2009-02-28 5:35pm

rakas17
Centurion Member
From: London
Registered: 2008-05-07
Posts: 142
Bikes: 2

Re: 1/3 Scale PK Ripper Project

cool, maybe one of those guys would commission me to make one for them.  Or i'm gonna end up homeless shining shoes and selling miniature bmx seats:lol:

Offline

 

#18 2009-02-28 5:53pm

AshtabulaX
Member
Registered: 2008-11-04
Posts: 49
Bikes: 4

Re: 1/3 Scale PK Ripper Project

Really nice work.I would buy this 1/3 scale P.K.RIPPER over any 1/3 scale car any day of the week.I was just thinkn' you could have saved some time on the seat by going with a UNI hammer head all in 1 seat and post,but it would lack the nice details like the chrome rails,clamps,etc.

Offline

 

#19 2009-02-28 5:55pm

rakas17
Centurion Member
From: London
Registered: 2008-05-07
Posts: 142
Bikes: 2

Re: 1/3 Scale PK Ripper Project

had to be the kashi cos thats what i had to copy.wink

Last edited by rakas17 (2009-02-28 5:57pm)

Offline

 

#20 2009-02-28 5:56pm

masterstint
Pro Member
From: Gretna, LA
Registered: 2007-05-06
Posts: 389
Bikes: 7
For Sale

Re: 1/3 Scale PK Ripper Project

you my friend, have incredible talent!!


"I say, I say, that boy dont quit talkin so much he might get his tongue sunburnt"-Foghorn Leghorn

Offline

 

#21 2009-02-28 6:01pm

PlanetX
Expert
From: Costa Mesa, CA
Registered: 2007-08-13
Posts: 725
Bikes: 47
Website

Re: 1/3 Scale PK Ripper Project

Sweet. Very, very well done.


Bikes owned 1978-1989: '78 Schwinn Scrambler 36/36, '78 Redline Proline, '77 Redline MX-II, '79 Thruster, '79 Torker, '77 Roger DeCoster, '80 JMC, '80 Fuji Feather, '81 Boss (STOLEN!), '82 Hutch Pro, '82 Patterson, '83 GT Pro, '83 Profile Champ Pro

Offline

 

#23 2009-02-28 6:27pm

swbruni
BMXer 4 Life
From: Detroit, MI
Registered: 2008-08-10
Posts: 4176
Bikes: 12

Re: 1/3 Scale PK Ripper Project

Wow looks great..you must have A ton of time invested but well worth it ...big_smile


hava a great day....

(.)(.)
  ).( 
( y )

Offline

 

#24 2009-02-28 6:49pm

oldskoololdman
Intermediate
From: Sartell, MN
Registered: 2009-01-31
Posts: 360

Re: 1/3 Scale PK Ripper Project

That is incredible.That is going to look awesome when finished.To bad movies are all cgi now,cause I bet George Lucas would give you a job in a heartbeat.


Whoever dies with the most bikes wins!
Looking for:26.6mm seatpost and cheap 24" wheels

Offline

 

#25 2009-02-28 7:04pm

RusT808
Pro MemberHawaiian Built
From: Hi.
Registered: 2009-01-16
Posts: 4650
For Sale

Re: 1/3 Scale PK Ripper Project

Awesome x 100000000000000000000000000000000000000!!!!!!!!!!!!!!!!!!!!!!!!!


SHOOTS, BRAH!!

Offline

 

Board footer