Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 41 users online :: 5 registered, 0 hidden and 36 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], mark.f, MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Mjöllnir - 1.5" porting Handheld Piston Hybrid

Built a hybrid cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
Sponsored 
  • Author
    Message

Unread postAuthor: MrCrowley » Sat Dec 03, 2011 1:00 am

Does the F1 chrony need the guide rods? I found one on an auction site for $90NZD that doesn't have them but the guy says they're not needed.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: jackssmirkingrevenge » Sat Dec 03, 2011 1:03 am

MrCrowley wrote:Does the F1 chrony need the guide rods?


The rods are there to hold the sunshields that allow the chrony to be used in stronger sunlight. They also provide a useful aiming guide, but the chrony works perfectly well without them, it's not integral to the function.
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: MrCrowley » Sat Dec 03, 2011 1:12 am

Awesome, just bought it for $76USD including shipping from a town not too far away so should arrive Tuesday-ish.

In typical №8 wire fashion, I'll make my own sunshield and guide rods :)

Edit: Cultural lexicons aside, №8 wire would actually probably work for the guide rods :D
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: jackssmirkingrevenge » Sat Dec 03, 2011 1:18 am

MrCrowley wrote:Cultural lexicons aside, №8 wire would actually probably work for the guide rods :D


If it's 4mm then it's exactly the right size!
  • 0

Attachments
CIMG0012.JPG
User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: MrCrowley » Sat Dec 03, 2011 1:30 am

Fùck me! I've always wondered what Kiwi blokes back in the day used this wire for, apart from fencing, and now I know - F1 chronograph guide rods!

I've got some №8 wire in the garage too, think I made the electrodes for this cannon out of it.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: MrCrowley » Thu Dec 08, 2011 5:54 am

Chrony arrived but, unfortunately, after I had already gone away up north to waterblast my friends bach.

Here's a new video, plenty of things you guys can critique/give me crap about [youtube]http://www.youtube.com/watch?v=dRS5mBt6J-o[/youtube]
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: POLAND_SPUD » Thu Dec 08, 2011 6:27 am

when life gives you lemons you put them in a freezer and then shoot them in your hybrid

:D
  • 0

Children are the future

unless we stop them now
User avatar
POLAND_SPUD
Chief of Staff
Chief of Staff
 
Posts: 5405
Joined: Sat Oct 13, 2007 4:43 pm
Country: Israel (il)
Reputation: 10

Sponsored

Sponsor
 


Unread postAuthor: jackssmirkingrevenge » Thu Dec 08, 2011 6:51 am

MrCrowley wrote:Here's a new video, plenty of things you guys can critique/give me crap about


- No shoes in NZ? Does it alert the sheep to your approach :D

- After the Mythbusters debacle, is shooting into anything other than a suitable backstop (miniboy excluded ;)) a good idea?

- Needs some closer-to-the-target shots

Otherwise, good stuff :)
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: Crna Legija » Thu Dec 08, 2011 7:03 am

jackssmirkingrevenge wrote:No shoes in NZ?


im suprized he not wareing flip flops and socks :D thats what all the new Zealanders roll hear in Australia.
  • 0

'' To alcohol... The cause of, and solution to, all of life's problems.”
--Homer Simpson

Add me on ps3: wannafuk, 8/11/11 cant wait
User avatar
Crna Legija
Major General
Major General
 
Posts: 2333
Joined: Sun Jul 20, 2008 5:14 am
Location: australia
Reputation: 0

Unread postAuthor: mark.f » Thu Dec 08, 2011 8:20 am

Crna Legija wrote:im suprized he not wareing flip flops and socks :D thats what all the new Zealanders roll hear in Australia.


<div align="center">u mad?

Image</div>

:D

Anyways, good job MrCrowley, I always like seeing new videos of your tuning fork. :wink:
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Unread postAuthor: mobile chernobyl » Thu Dec 08, 2011 9:16 am

Need's moar impact footage!

How do we know if your actually shooting anything or just dry firing all over the land?

Also a slow-mo of your "sabot's" as they leave the barrel would be awesome too. - Are you concerned at all if they are discarding? that would make for some cool footage!

That stump impact is a shame - I expected the D-cell's to do a bit more damage - but that's what happens when you shoot into the grain! you should have tried a cross grain shot to get some more cracking/splintering going on... into the grain is the strongest orientation of wood.

I'll be getting a Chrony F1 for the holiday so we can finally compare our actual muzzle velocities to those of the optimistic HGDT!

It's always nice seeing a hybrid video and It's good to see you're putting so much effort into yours! It would be nice to have a legit high powered amateur cannon'ing channel on youtube!
  • 0

User avatar
mobile chernobyl
Colonel
Colonel
 
Posts: 732
Joined: Sun Dec 03, 2006 11:53 am
Reputation: 9

Unread postAuthor: warhead052 » Thu Dec 08, 2011 10:07 am

Haha at the "Fùck yeah!". But other than that nice shots.
  • 0


warhead052
Major General
Major General
 
Posts: 1769
Joined: Mon Mar 21, 2011 5:41 pm
Reputation: 0

Unread postAuthor: SpudBlaster15 » Thu Dec 08, 2011 2:54 pm

Quality video, I need to start filming some new footage as well.

One thing I'm concerned about is your lack of safety equipment. I always wear shatter resistant safety glasses (A full face shield if the target is a short distance from the muzzle and there's a significant chance of ricochet), and 30dB rated ear defenders when I operate the TBMA. It's quite surprising that the noise output of Mjölnir is even tolerable at close range without any sort of hearing protection.

Other than that, I have to comment on your insane hip firing skills. I can't aim my hybrid worth a shlt from anywhere other than my shoulder, but you're hitting targets dead center without even sighting down the barrel. Impressive.

Also, props on the video editing, it's excellent.
  • 0

People should not be afraid of their governments. Governments should be afraid of their people.
User avatar
SpudBlaster15
Major General
Major General
 
Posts: 2385
Joined: Wed Oct 18, 2006 11:12 pm
Location: Canada
Country: Poland (pl)
Reputation: 3

Unread postAuthor: MrCrowley » Thu Dec 08, 2011 3:48 pm

jackssmirkingrevenge wrote:- No shoes in NZ? Does it alert the sheep to your approach :D

- After the Mythbusters debacle, is shooting into anything other than a suitable backstop (miniboy excluded ;)) a good idea?

- Needs some closer-to-the-target shots

Otherwise, good stuff :)

Cheers :D
Was doing these shots in my break from waterblasting, hence the lack of shoes and shirt. Though, if I hadn't been waterblasting I imagine I'd still be shirtless and shoeless as it is summer and I don't walk around the house in shoes :wink:

The only shot I regret not doing closer-to-the-target is that frozen lemon fired at that block of wood, I think all the other shots would have been pretty lame close-up as they didn't do much damage to the tree stump as MC explained.

mobile chernobyl wrote:Need's moar impact footage!

I should be going up again next week or perhaps sometime after that. I need a better target but that means bringing one up there in the car as all he has are tree stumps and pieces of wood.

mobile chernobyl wrote:How do we know if your actually shooting anything or just dry firing all over the land?

The first lemon shot probably vaporised, the muzzle blast is quite large and misty with no observable impact marks on the tree stump. You saw the damage from the two batteries as well as the black powder cloud they release upon impact. One of the other lemon shots can be seen in a frame grab, the other destroyed a block of 45mm thick wood or something. On the first golf ball shot you can see it and hear it hit the tree, on the last golf ball shot you can hear the golf ball whiz through the air. :wink:

mobile chernobyl wrote:Also a slow-mo of your "sabot's" as they leave the barrel would be awesome too. - Are you concerned at all if they are discarding? that would make for some cool footage!

Perhaps if I can get another HD camera to film as well, I find the FC-100 can be a bit hit-and-miss with getting a good shot from a good angle with good lighting and good focus.

By the way, the only 'discarding sabot' were socks used for the golf balls. On one lemon shot I used a sock to try and prevent it from disintegrating in the barrel like the first lemon shot and the batteries had their sabots taped to them (I never did find any trace of them, though).

mobile chernobyl wrote:That stump impact is a shame - I expected the D-cell's to do a bit more damage - but that's what happens when you shoot into the grain! you should have tried a cross grain shot to get some more cracking/splintering going on... into the grain is the strongest orientation of wood.
Yeah I was disappointed at first but then I didn't really mind as it's only a tree stump picked as a target on whim and opportunity, I'm hoping to film some better targets. I think D-Cells aren't great projectiles either, they clearly explode too easily.

mobile chernobyl wrote:I'll be getting a Chrony F1 for the holiday so we can finally compare our actual muzzle velocities to those of the optimistic HGDT!
I'm quite excited about trying this, though it's unfortunate that most of my projectile have sabots that may screw up the reading. Lemons could disintegrate sending some pieces faster or slower than the main piece, golf balls need a sabot, D-Cells have sabots that, although not discarding, may break apart upon launch.

mobile chernobyl wrote:It's always nice seeing a hybrid video and It's good to see you're putting so much effort into yours! It would be nice to have a legit high powered amateur cannon'ing channel on youtube!
Thanks, I'm hoping to achieve a modest viewer base for my channel in the future to try and counter all the crap spudgun videos on YouTube :P

SpudBlaster15 wrote:One thing I'm concerned about is your lack of safety equipment. I always wear shatter resistant safety glasses (A full face shield if the target is a short distance from the muzzle and there's a significant chance of ricochet), and 30dB rated ear defenders when I operate the TBMA. It's quite surprising that the noise output of Mjölnir is even tolerable at close range without any sort of hearing protection
The first battery shot was done remotely to test whether anything potentially dangerous may ricochet, when I found that the battery pretty much disintegrates except for the shell which floats away 5m, I wasn't too worried about the lack of safety gear. Not that I had any up at the bach anyway, I could have borrowed some designer sunglasses perhaps :D

The sound output is a tricky one. Shooting it in my garage or car port is quite deafening, especially when in front of the barrel, shooting in a small outdoor area can be just as bad but shooting in semi-open areas doesn't seem to be that bad really. Maybe it's the years of abuse my ears have taken in the form of Behemoth and in-ear earphones. Though, I should always wear ear protection, as well as eye protection.

SpudBlaster15 wrote:Other than that, I have to comment on your insane hip firing skills. I can't aim my hybrid worth a shlt from anywhere other than my shoulder, but you're hitting targets dead center without even sighting down the barrel. Impressive.

Also, props on the video editing, it's excellent.

Haha, I'd probably be quite bad firing from the shoulder (not to mention it'd scare the crap out of me). I think the difference is my long barrel, it pretty much reaches the target :D

Notes:

Bad idea putting a pressure gauge on the pilot, obviously the piston compresses the pilot air to well over 300PSI which caused my gauge face to be blown off and the gauge to read 30PSI by default.

After the first shot the pilot air started leaking in to the chamber, I assume from a failed o-ring. This caused problems with fuelling as after pumping the pilot to 220PSI, when I go to fuel the chamber the chamber would have ~6PSI of air in it meaning I had to quickly vent the chamber and then inject the MAPP gas hoping only 0.5PSI or so that read on the gauge was air while the other 4.5PSI was the MAPP gas... if you get what I mean.
I managed to get 90% of the shots to ignite properly with only two having the fuel mixture off. A volumetric setup would have been better in this situation although the chamber air might have caused mixing issues when injecting the fuel.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: jrrdw » Thu Dec 08, 2011 4:13 pm

You mind filming the fueling/preparation for shooting process?
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6540
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

PreviousNext

Return to Hybrid Cannon Database

Who is online

Registered users: Bing [Bot], Google [Bot], mark.f, MSNbot Media, Yahoo [Bot]

Reputation System ©'