Extension Knives from JimBrown257

Post here pictures of your knives and blades! All images should be on an external web site, and linked to messages.

Moderators: tr4252, The Motley Crew

Forum rules
There are a few things you should know before posting in these forums. If you are a new user, please click here and read carefully. Thanks a lot!
Post Reply
User avatar
ILikeStilettos
Posts: 1542
Joined: Tue Jan 28, 2014 3:36 pm
Location: Norman, Oklahoma, USA
Contact:

Extension Knives from JimBrown257

Post by ILikeStilettos » Wed Jul 31, 2019 10:27 pm

First off, let me say that I totally love working with Jeremy (JimBrown257) because he turns my crazy ideas into reality. The last two he has built for me are "extension" knives. That is, they have disproportionately long blades on shorter handles. When they are open, the look like regular 13's except for those impossible blades. When you close them, there's a spring loaded extension that hides itself in the blade well. I designed both of these from Russian Prison Knife inspiration and some other sources too numerous to mention here. Sharp eyed observers will note that the designs got subtly altered between the drawing board and reality and with my complete endorsement and joy in the final results. I often encourage Jeremey to do just whatever he thinks works best, and that alternative is always better than my original concept.

First, here are the pictures:

The upper one in dyed giraffe bone is the Sub-Hilt Seal Recon Fighter and the lower one in dyed Buckey Burl is the RPKDagger.

Image

When I provide scale materail to Jeremy, not only do I get exactly what I want, but also things match fore and aft and I don't end up with an oreo.

Image

The Sub-Hilt has a standard exposed rocker and the upswept Bowie style blade the Seals favor. The RPK dagger has a swept plunge dagger blade with a parabolic profile. Most Italians use a combination of straight lines and constant radius curves. The parabolic is a continuously changing radius, large at the ricasso and small at the point. This means the edge curves down to the point very gradually at the ricasso and abruptly at the tip. This makes for a wider blade throughout the length and a grind that is easier to produce. On this one the rocker is reversed so that the fire button is very near the end of the handle instead of in the middle. I went over the top on this one and designed the longest blade and shortest handle I could come up with.

Image

Image

I haven't figured a good way to post videos in this forum, so here are links to where you can see YouTube videos of the knives in action.


SubHilt Part One: https://youtu.be/c4rpAjrFHp4

SubHilt Part Two: https://youtu.be/rmD_hvuKsFU

RPKDagger: https://youtu.be/LFmCiQJ7_N4

The original SubHilt design:

Image

Open external view:

Image

Closed external view:

Image

Open view with internal parts:

Image

Closed view with internal parts:

Image

Approximately 9" Russian Prison Dagger sold by Mike Kovalenko. All I had was this picture, but it generated a lot of interest on my Facebook page.

Image

My original design for the dagger:

Image

Open external view:

Image

Closed external view:

Image

Open view with internal parts:

Image

Closed view with internal parts:

Image
Dave Sause
oldandfat@cox.net
(405) 694-3690

"And you're telling me this because, somehow, I look like I give a shit?"

"Let a smile be your umbrella and you're gonna get your dumb ass wet."

sammy the blade
Posts: 2279
Joined: Sat Mar 26, 2016 7:18 pm
Location: Indiana

Re: Extension Knives from JimBrown257

Post by sammy the blade » Wed Jul 31, 2019 11:24 pm

Awesome!

User avatar
thom
Posts: 580
Joined: Wed Feb 08, 2017 1:36 am
Location: Maryland

Re: Extension Knives from JimBrown257

Post by thom » Wed Jul 31, 2019 11:48 pm

WOW! Don't mean to shout, but I had to. Awesome times 2. Great design and execution.

portlandmike
Posts: 473
Joined: Tue Sep 18, 2018 3:19 am
Location: Portland, OR

Re: Extension Knives from JimBrown257

Post by portlandmike » Thu Aug 01, 2019 4:10 am

So cool to it go from design to an actual firing knife.. and man is it gorgeous!

User avatar
JimBrown257
Posts: 1742
Joined: Tue Apr 17, 2012 10:50 am
Location: Michigan

Re: Extension Knives from JimBrown257

Post by JimBrown257 » Thu Aug 01, 2019 4:56 am

Dave, you should post a video of them firing. It's kind of a windshield wiper effect.

Lucentcrow
Posts: 449
Joined: Sun Feb 03, 2019 2:02 pm
Location: Tonbridge

Re: Extension Knives from JimBrown257

Post by Lucentcrow » Thu Aug 01, 2019 8:54 am

Fantastic

User avatar
ILikeStilettos
Posts: 1542
Joined: Tue Jan 28, 2014 3:36 pm
Location: Norman, Oklahoma, USA
Contact:

Re: Extension Knives from JimBrown257

Post by ILikeStilettos » Thu Aug 01, 2019 9:10 am

JimBrown257 wrote:
Thu Aug 01, 2019 4:56 am
Dave, you should post a video of them firing. It's kind of a windshield wiper effect.
There are three videos in the start of this topic.
Dave Sause
oldandfat@cox.net
(405) 694-3690

"And you're telling me this because, somehow, I look like I give a shit?"

"Let a smile be your umbrella and you're gonna get your dumb ass wet."

User avatar
ILikeStilettos
Posts: 1542
Joined: Tue Jan 28, 2014 3:36 pm
Location: Norman, Oklahoma, USA
Contact:

Re: Extension Knives from JimBrown257

Post by ILikeStilettos » Thu Aug 01, 2019 4:46 pm

Thanks for the kind words, gentlemen.
Dave Sause
oldandfat@cox.net
(405) 694-3690

"And you're telling me this because, somehow, I look like I give a shit?"

"Let a smile be your umbrella and you're gonna get your dumb ass wet."

User avatar
rock-n-roll$$$$$$
Posts: 343
Joined: Tue Nov 29, 2016 9:04 pm

Re: Extension Knives from JimBrown257

Post by rock-n-roll$$$$$$ » Thu Aug 01, 2019 5:24 pm

nice design Dave,and excellent work Jeremey.

User avatar
JimBrown257
Posts: 1742
Joined: Tue Apr 17, 2012 10:50 am
Location: Michigan

Re: Extension Knives from JimBrown257

Post by JimBrown257 » Fri Aug 02, 2019 3:19 am

Lol, I see the videos now.

User avatar
picklocksrock
Posts: 133
Joined: Mon Feb 11, 2019 3:34 pm

Re: Extension Knives from JimBrown257

Post by picklocksrock » Mon Nov 04, 2019 7:43 am

Those knives are phenomenal! I really like those.
“Tough times never last, but tough people do”
-Robert H. Shuller

Lucentcrow
Posts: 449
Joined: Sun Feb 03, 2019 2:02 pm
Location: Tonbridge

Re: Extension Knives from JimBrown257

Post by Lucentcrow » Mon Nov 04, 2019 4:35 pm

Awesome design and craftsmanship

sprink
Posts: 172
Joined: Fri Aug 06, 2010 12:48 am

Re: Extension Knives from JimBrown257

Post by sprink » Tue Nov 05, 2019 12:17 am

Great collaboration guys, they look amazing

Post Reply