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long range ammo MiniBoy Mark I

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Unread postAuthor: MrCrowley » Wed May 11, 2011 6:42 am

I just realised I'll almost be pushing 10,000J with this shot depending on the weight :shock:

I wonder how long the projectile will stay supersonic for, according to HGDT I should be in the range of 400ms muzzle velocity (including the sabot). The sabot is looking really nice by the way, I'm pretty confident that it will launch successfully.
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Unread postAuthor: Labtecpower » Wed May 11, 2011 7:00 am

hehe, you'd better have some recoil absorber ready!
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"ñøw mÿ šįg šüçkś!"
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Unread postAuthor: jackssmirkingrevenge » Wed May 11, 2011 7:08 am

LeMaudit wrote:Yes! :twisted:
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Unread postAuthor: Insomniac » Wed May 11, 2011 7:21 am

By the way, you can now get those little keychain cameras in true HD resolution (720p)!

[youtube]http://www.youtube.com/watch?v=yRSCaArMaQU[/youtube]

Unlike the older ones that would stretch a 640x480 imag out to something like 720 pixels wide, this newer one actually records at the correct resolution, without upscaling from a lower-res sensor.

It's referred to as the #11 version (I believe the most used older varient was the #3 camera). They can be had for about forty bucks, which is a bit costlier than the originals.
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I wonder how much deeper the ocean would be without sponges.
Right now I'm having amnesia and deja vu at the same time. I think I've forgotten this before.

Add me on msn!!! insomniac-55@hotmail.com
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Unread postAuthor: LeMaudit » Wed May 11, 2011 7:32 am

MrCrowley wrote:I just realised I'll almost be pushing 10,000J with this shot depending on the weight :shock:


I'm only the builder, not the mad test pilot! ;-)

I plan to shave a bit some weight, maybe by thinning the plates in some points. I'll do that at the end.


supersonic


:shock:

The sabot is looking really nice by the way


Thanks, glad you like it guys.
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Unread postAuthor: POLAND_SPUD » Wed May 11, 2011 7:49 am

jackssmirkingrevenge wrote:
LeMaudit wrote:Yes! :twisted:

OMG LOL
Today morning I thought 'hey I wonder if LeMaudit's avatar has anything to do with masturbation'
Lol seriously
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Unread postAuthor: LeMaudit » Wed May 11, 2011 8:29 am

Today morning I thought 'hey I wonder if LeMaudit's avatar has anything to do with masturbation'


JSR is right... a palm tattoo is a convenient reminder...

:lol:

Seriously, here's a hint
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Unread postAuthor: Labtecpower » Wed May 11, 2011 10:37 am

Image
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Unread postAuthor: jackssmirkingrevenge » Wed May 11, 2011 10:43 am

HAHAHA!

props for finding the original picture ;)
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Unread postAuthor: MrCrowley » Wed May 11, 2011 4:04 pm

Hahahahaha these pictures are great, props to Le Maudit for the good photoshop job :P
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Unread postAuthor: LeMaudit » Fri May 13, 2011 6:18 pm

I'm please to announce that the sabot is completed. Simpler than my original ideas, fortunately dewey1 and JSR were there to KISS me...
(can I say that in English? :? I'm not sure it translate :lol: )

The sabot can be set in 2 configurations:
1) A fixed setup, kinda like a cup sabot.
2) A separating setup, kinda like a spindle sabot.

I'm pretty sure the spindle is good enough, but for the sake of experimenting, maybe MrCrowley will be able to compare the launch for both type with slo-mo video, and see if going to the trouble of making a sabot with separating petals worth it.


Here's the fixed setup, total weight 54 grams.
The UHMW ring is there to prevent the petals to break apart at the washer level, and to lower the stress on the aluminum bolt.
Image
Image


Here's the separating setup, total weight 49.6 grams.
No need for the large washer and the ring, just a thicker rubber washer that keep the petals together when the projectile is in place.
Image
Image
Image


Now where should I mail that thingy? Any takers? :-D

I will try this week-end to make a few mock-up ammo in a wood dowel, just to be able to see if the sabot survive the impact and launch properly without using the real MiniBoy: it can be lost only once! ;-)
And I can always make a sturdier sabot.

Oh, and for those who forgot what the scale of this thingy is:
Image
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Unread postAuthor: velocity3x » Fri May 13, 2011 6:29 pm

LeMaudit,
Extremely elegant design and absolutely beautiful machining :!:
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Unread postAuthor: MrCrowley » Fri May 13, 2011 6:42 pm

Goddammit that thing is beautiful :shock:
I'm sure there'll be tears in my eyes when I shoot the real thing :(
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Unread postAuthor: LeMaudit » Fri May 13, 2011 6:53 pm

velocity3x wrote:Extremely elegant design and absolutely beautiful machining


You're too kind, thanks :-) The precision of the machinery helps a lot ;-) And I share the design with JSR and dewey1. In fact, JSR draw something very similar :-)
Image



MrCrowley wrote:I'm sure there'll be tears in my eyes


Please don't cry. :?
it's a finder-keeper, doesn't that give you a good incentive to retrieve it? :lol:
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Unread postAuthor: MrCrowley » Fri May 13, 2011 7:01 pm

it's a finder-keeper, doesn't that give you a good incentive to retrieve it?

In that case I'm sure half of Spudfiles will turn out to look for it :D
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