T 14 Nambu - three caliber set, 7,65mm, 9mm, 11.35mm

DonVoigt · 12-28-2017, 09:56 PM

I have posted the 7,65mm conversion before and perhaps also the 9mm modified luger barrels fit to a modified T14 upper receiver.

Both the 7,65mm and 9mm luger will feed from the magazine and with the correct ammo, and function in the modifed T14.

John Sabato made a comment that perhaps one could not make a .45acp T 14. I took this as a friendly challenge. And here is the result.

The .45 barrel is one of Eugene's(Lugerman) barrels from his early .45 work. You have seen them on my .45 luger conversion and on Ed Tinkers two .45 lugers that Eugene finished for him.
The bolt face required opening up for the larger diameter of the .45 round, just as it does in the luger conversion.

I decided to chamber this one in .45acp so I could use mid range match 185gr .45 acp ammo, as it is not as hot as the ball round.

I fired this conversion yesterday, a whopping 3 times, as it is cold and it is a single shot pistol. The .45 is too big, of course, to feed through the Nambu magazine. Takes the shooter to hold the bolt back and a "loader" to drop the shell into the breech. Time consuming and cumbersome.

But, it shoots like a dream; not too much recoil - in fact very pleasant to shoot.

I know many will say the T 14 is not "strong" enough, but if one takes the time to study the pressures and energy generated by this mid range round, one finds it actually well below the 9mm luger and just above the original 9mm nambu round.

Won't see a lot of use, a conversation piece, and just to show it can be done.

Pictures show the .45acp T 14 , with a 9mm and 7,65mm upper above; and several views of the .45acp conversion.

Why? Obviously I don't have enough to do!

Zorba · 12-28-2017, 10:22 PM

Now THAT is cool, and sure beats trying to find Nambu ammo!

sheepherder · 12-28-2017, 10:31 PM

Sir Edmund Hillary would be proud!

Edward Tinker · 12-28-2017, 11:40 PM

Very cool Don, great work

Bill_in_VA · 12-29-2017, 07:28 AM

Don are you going to bring this to Louisville? I’m interested in looking it over.

DavidJayUden · 12-29-2017, 07:38 AM

I just love it when gun-guys have too much time on their hands.
dju

DonVoigt · 12-29-2017, 01:47 PM

Quote:

Originally Posted by Bill_in_VA

Don are you going to bring this to Louisville? I’m interested in looking it over.

Bill,
I'm flying in, just too much driving; so the answer is no.
Remind me if George gets a Shenandoah fest together!

Bill_in_VA · 12-30-2017, 09:52 AM

Quote:

Originally Posted by DonVoigt

Bill,
I'm flying in, just too much driving; so the answer is no.
Remind me if George gets a Shenandoah fest together!

Drive to Wytheville and you can ride with me and save some airfare. I’m only two hours or so from you, remember.

Olle · 12-30-2017, 11:30 PM

I guess it was only a matter of time, and this will award you a virtual Medal of Honor for bravery behind the trigger!

Ron Wood · 12-31-2017, 12:32 PM

Quote:

Originally Posted by sheepherder

Sir Edmund Hillary would be proud!

And Cervantes could write a novel about the quest.

Curss · 01-01-2018, 06:31 PM

Amazing work!

Thor · 01-02-2018, 01:49 PM

Very clever.

Sonofeugene · 01-03-2018, 02:15 AM

You wouldn't be the same guy who shoehorned a hemi into an Austin Healy Sprite, would you?

K.Wilhelm · 01-03-2018, 08:58 AM

I'd love to have a Nambu with a 7.65x21mm barrel, but don't have the skills to do the necessary work.

John Sabato · 01-03-2018, 09:10 AM

Quote:

Originally Posted by Olle

I guess it was only a matter of time, and this will award you a virtual Medal of Honor for bravery behind the trigger!

My thoughts exactly... Just curious? How many times has the .45 version been fired? and what kind of proof loads have you used? How does the .45 compare with the specs of the original 8mm cartridge? More pressure or less at cartridge detonation?

BTW, the machine work looks impeccable!

DonVoigt · 01-03-2018, 09:53 AM

John,
I addressed your questions in the initial post.
The pressure of the .45acp is about 65% of that of the 9mm p, and so is the energy.
Having converted and fired the 9mmP version, I feel quite "comfortable" with the much lower pressure and energy of the .45. The SAAMI pressure for the 9mm P is 35K psi and for the 45 only 24K psi.

I consider the 9mm P version sufficient "proofing" of the concept given the much lower pressure and energy of the .45.

Historically both the Indonesians and Koreans(North IIRC) converted and used the Nambu in 9mm P for a short time after WWII.

I can find no pressure measurements for the original 8mm Nambu round. But it's energy can be determined from wt x velocity.

Just a pedantic note, cartridges do not "detonate", smokless powder burns at a rapid rate; maximum pressure is reached if/when all the powder burns before the bullet exits the barrel. What is measured and specified is "peak" pressure, measured at or near the chamber, at least that is my understanding from what I have read.

Zorba · 01-03-2018, 05:44 PM

Quote:

Originally Posted by Sonofeugene

You wouldn't be the same guy who shoehorned a hemi into an Austin Healy Sprite, would you?

Naw, I think he's the one who put a 454 in a (original) VW Beetle!

Edward Tinker · 01-03-2018, 06:02 PM

kinda like this....

upper is 8mm Nambu
bottom is 9mm Luger

left is 8mm - right is 9mm

LugerMan.com · 01-15-2018, 09:08 AM

Just came across this,

Nice to know someone else is playing around.

I just happen to have an extra Nambu Upper and some miss. parts laying around, from restoration I did last year.

And I have some extra 45 Barrels.

Anyone cares for it? Let me know

I will not put it together, that for Don to do,

he clearly has more time then I do. ;0)

12-28-2017, 09:56 PM	#1
DonVoigt User Join Date: Apr 2015 Location: near Charlotte NC Posts: 4,677 Thanks: 1,439 Thanked 4,347 Times in 2,038 Posts	T 14 Nambu - three caliber set, 7,65mm, 9mm, 11.35mm I have posted the 7,65mm conversion before and perhaps also the 9mm modified luger barrels fit to a modified T14 upper receiver. Both the 7,65mm and 9mm luger will feed from the magazine and with the correct ammo, and function in the modifed T14. John Sabato made a comment that perhaps one could not make a .45acp T 14. I took this as a friendly challenge. And here is the result. The .45 barrel is one of Eugene's(Lugerman) barrels from his early .45 work. You have seen them on my .45 luger conversion and on Ed Tinkers two .45 lugers that Eugene finished for him. The bolt face required opening up for the larger diameter of the .45 round, just as it does in the luger conversion. I decided to chamber this one in .45acp so I could use mid range match 185gr .45 acp ammo, as it is not as hot as the ball round. I fired this conversion yesterday, a whopping 3 times, as it is cold and it is a single shot pistol. The .45 is too big, of course, to feed through the Nambu magazine. Takes the shooter to hold the bolt back and a "loader" to drop the shell into the breech. Time consuming and cumbersome. But, it shoots like a dream; not too much recoil - in fact very pleasant to shoot. I know many will say the T 14 is not "strong" enough, but if one takes the time to study the pressures and energy generated by this mid range round, one finds it actually well below the 9mm luger and just above the original 9mm nambu round. Won't see a lot of use, a conversation piece, and just to show it can be done. Pictures show the .45acp T 14 , with a 9mm and 7,65mm upper above; and several views of the .45acp conversion. Why? Obviously I don't have enough to do! Attached Thumbnails __________________ 03man(Don Voigt); Luger student and collector. Looking for DWM side plate: 69 ; Dreyse 1907 pistol K.S. Gendarmerie

12-28-2017, 10:31 PM	#3
sheepherder Lifer Lifetime Forum Patron Join Date: Feb 2009 Location: ...on the 'ol Erie Canal... Posts: 8,181 Thanks: 1,398 Thanked 4,438 Times in 2,327 Posts	Sir Edmund Hillary would be proud! __________________ I like my coffee the way I like my women... ...Cold and bitter...

12-29-2017, 07:28 AM	#5
Bill_in_VA User Join Date: Nov 2013 Location: Southwest Virginia Posts: 343 Thanks: 731 Thanked 470 Times in 178 Posts	Don are you going to bring this to Louisville? I’m interested in looking it over. __________________ John 8:32 reive (riːv) vb (Military) (intr) dialect Scot and Northern English to go on a plundering raid [variant of reave] ˈreiver n e.g., " Some view the Border Reivers as loveable rogues."

12-30-2017, 11:30 PM	#9
Olle User Join Date: Feb 2010 Location: Tennessee Posts: 1,149 Thanks: 159 Thanked 663 Times in 318 Posts	I guess it was only a matter of time, and this will award you a virtual Medal of Honor for bravery behind the trigger! __________________ Deer Hollow Enterprises, LLC Gun repair and restoration

01-01-2018, 06:31 PM	#11
Curss User Join Date: Sep 2009 Location: Florida Posts: 303 Thanks: 304 Thanked 98 Times in 75 Posts	Amazing work! __________________ -Chris

12-28-2017, 10:22 PM	#2
Zorba User Join Date: Feb 2013 Location: Merritt Island, Fl Posts: 951 Thanks: 776 Thanked 526 Times in 289 Posts	Now THAT is cool, and sure beats trying to find Nambu ammo!

12-28-2017, 11:40 PM	#4
Edward Tinker Super Moderator Eternal Lifer LugerForum Patron Join Date: Jun 2002 Location: North of Spokane, WA Posts: 15,909 Thanks: 1,986 Thanked 4,500 Times in 2,076 Posts	Very cool Don, great work

12-29-2017, 07:38 AM	#6
DavidJayUden Patron LugerForum Patron Join Date: Nov 2008 Posts: 4,047 Thanks: 578 Thanked 1,414 Times in 887 Posts	I just love it when gun-guys have too much time on their hands. dju

01-02-2018, 01:49 PM	#12
Thor User Join Date: Jun 2002 Location: Rio Rancho, New Mexico Posts: 4,583 Thanks: 958 Thanked 970 Times in 276 Posts	Very clever. __________________ Thor's Luger Clinic http://members.rennlist.com/lugerman/ Ted Green (Thor Yaller Boots) 725 Western Hills Dr SE, Rio Rancho, NM 87124 915-526-8925 Email thor340@aol.com ----------------------------------- John3:3 Jesus answered and said to him, "Most assuredly, I say to you, unless one is born again, he cannot see the kingdom of God."

01-03-2018, 02:15 AM	#13
Sonofeugene User Join Date: Oct 2013 Posts: 157 Thanks: 1 Thanked 118 Times in 64 Posts	You wouldn't be the same guy who shoehorned a hemi into an Austin Healy Sprite, would you?

01-03-2018, 08:58 AM	#14
K.Wilhelm User Join Date: Jun 2013 Location: South Central Colorado Posts: 215 Thanks: 45 Thanked 109 Times in 66 Posts	I'd love to have a Nambu with a 7.65x21mm barrel, but don't have the skills to do the necessary work. __________________ NRA Endowment Life member Proud veteran of the Naval Security Group Last edited by K.Wilhelm; 01-03-2018 at 09:11 AM. Reason: additional explanatory material

01-03-2018, 09:53 AM	#16
DonVoigt User Join Date: Apr 2015 Location: near Charlotte NC Posts: 4,677 Thanks: 1,439 Thanked 4,347 Times in 2,038 Posts	John, I addressed your questions in the initial post. The pressure of the .45acp is about 65% of that of the 9mm p, and so is the energy. Having converted and fired the 9mmP version, I feel quite "comfortable" with the much lower pressure and energy of the .45. The SAAMI pressure for the 9mm P is 35K psi and for the 45 only 24K psi. I consider the 9mm P version sufficient "proofing" of the concept given the much lower pressure and energy of the .45. Historically both the Indonesians and Koreans(North IIRC) converted and used the Nambu in 9mm P for a short time after WWII. I can find no pressure measurements for the original 8mm Nambu round. But it's energy can be determined from wt x velocity. Just a pedantic note, cartridges do not "detonate", smokless powder burns at a rapid rate; maximum pressure is reached if/when all the powder burns before the bullet exits the barrel. What is measured and specified is "peak" pressure, measured at or near the chamber, at least that is my understanding from what I have read. __________________ 03man(Don Voigt); Luger student and collector. Looking for DWM side plate: 69 ; Dreyse 1907 pistol K.S. Gendarmerie

01-03-2018, 06:02 PM	#18
Edward Tinker Super Moderator Eternal Lifer LugerForum Patron Join Date: Jun 2002 Location: North of Spokane, WA Posts: 15,909 Thanks: 1,986 Thanked 4,500 Times in 2,076 Posts	kinda like this.... upper is 8mm Nambu bottom is 9mm Luger left is 8mm - right is 9mm Attached Thumbnails

01-15-2018, 09:08 AM	#19
LugerMan.com User Join Date: Feb 2012 Posts: 377 Thanks: 91 Thanked 354 Times in 112 Posts	Upper and barrel Just came across this, Nice to know someone else is playing around. I just happen to have an extra Nambu Upper and some miss. parts laying around, from restoration I did last year. And I have some extra 45 Barrels. Anyone cares for it? Let me know I will not put it together, that for Don to do, he clearly has more time then I do. ;0) __________________ Eugene@LugerMan.com