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Author Topic: i want to make a jet pack.  (Read 3703 times)
silastic armor fiend
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« Reply #25 on: April 02, 2009, 03:23:43 am »

o sod it all. youre the only one that seems interested and willing (i am grateful, really), but i am doing pretty well now. i have it all figured out now, all thats left to do is paint and assemble.
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rovingjack
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« Reply #26 on: April 02, 2009, 04:24:07 am »

Rocketpowered Ultralight Compact Kinetic Pack, aka the R.U.C.K. Pack  Grin

Or affectionately the butt warmer.

Or Minion 21, named in honour of the poor minion who died in the first trial run, well sort of named, it's a little hard to remember their names That's why you assign numbers to them after all.

I was thinking for the design of it it could be fun to replace the boiler plate with a port hole like thing that is actually two panes of plastic set into the porthole with a colored liquid half filling the space between them. That way it looks like fuel sloshing in the center tank.
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silastic armor fiend
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« Reply #27 on: April 02, 2009, 05:57:15 am »

ive got pictures of the main components now so maybe you guys will be more able to help.
here is the nozzle. keep in mind that this is only the base coat of paint and before i added the RIVETS! its made from an old crayola lamp.
Spoiler (click to show/hide)
heres one of the fuel tanks. the painting on this, too, isnt done. im also going dremel it a little bit to look plated. oh... and add some RIVETS!
Spoiler (click to show/hide)
here are a couple of hoses that ive collected. i dont think that they will be enough, but it should be pretty easy to find some more.
Spoiler (click to show/hide)
im at a loss with how to cover up the back end of the fuel tanks and keep in style. suggestions?
unfortunately i wasnt able to get a bigger pipe for the main body/combustion chamber, but i should find time to pick one up tomorrow.
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JennyWren
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« Reply #28 on: April 02, 2009, 11:51:05 am »

ooo i got an idea! cant stop till its done.
YOU THREW STUFF OUT, faints daintley onto her armchair
i didnt exactly throw it out. just put it off to the side.

if the top of the fuel tank is to be streamlined you could attach refueling nozzles, fuel gauges, to the bottom, the shape wouldnt really matter is multiple, ports where located there.


Also what about warning labels
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silastic armor fiend
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« Reply #29 on: April 02, 2009, 03:15:07 pm »

wel yeah
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Mr. Hatchett
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« Reply #30 on: April 02, 2009, 03:23:59 pm »

Quote
im at a loss with how to cover up the back end of the fuel tanks and keep in style. suggestions?

If you're looking for the shape in your original diagram, maybe the nearest dollar store would have some plastic ramekins or finger bowls of the right size and shape.  If they did, you could get or make some short spacers with holes on either end, drill holes in the ramekins just below the rims and in the bottom ends of your tanks and bolt them on with the spacers on the inside, thus not having any visible reinforcement.  Wipe a bit of finishing putty into the screwdriver slots of the bolts, add rivet heads of similar size and shape on either side and it'd look a lot like your original concept drawing.
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silastic armor fiend
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« Reply #31 on: April 02, 2009, 04:50:48 pm »

wow! i think i may do just that. quick question, what would have been used as rocket fuel? oxygen and...
« Last Edit: April 02, 2009, 05:17:14 pm by silastic armor fiend » Logged
Mr. Hatchett
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« Reply #32 on: April 02, 2009, 10:39:53 pm »

wow! i think i may do just that. quick question, what would have been used as rocket fuel? oxygen and...
. . . and phlebotinum, stored under pressure in unobtanium cartridges.  You've just hit on one of the reasons there was no such thing as a jet pack at the turn of the twentieth century.
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Prof_Auerbach
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« Reply #33 on: April 02, 2009, 11:18:48 pm »

Your Personal Aerial Conveyance (P.A.C.) could utilize highly concentrated (~90%) hydrogen peroxide as a monopropellant. When such a concentration contacts silver, the catalyzed reaction frees one oxygen atom and generates a lot of heat, stimulating the remaining water molecules into steam, which, as we all know, can produce a terrific specific impulse when guided through the properly shaped nozzle.

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silastic armor fiend
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« Reply #34 on: April 03, 2009, 03:43:14 pm »

thanks for all your suggestions.
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silastic armor fiend
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« Reply #35 on: April 03, 2009, 10:26:42 pm »

so what im gonna do is, take the top off of a 20 oz dr. pepper bottle and fill it with resin for the tail cones on the fuel tanks. im gonna put in a valve and stem and what not to fill it up with fuel as well. i think in the future, when i have more money im gonna cold cast it with brass, but for now im just gonna paint it
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Dr cornelius quack
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« Reply #36 on: April 03, 2009, 11:07:38 pm »

I can certainly second the idea of filling any soda (Eek! I think I just used an Americanism!!) bottles with filler foam.

It makes for a much more rigid structure and allows you to drill into the shape for attaching other bits and pieces or fixing to the harness.

Another good wheeze is to use that thin modeling foam sheet that you get from the craft shops to make any parts that represent metalic strips or banding. It cuts really well to intrecate shapes and will stretch slightly to mould to the surface contours.
I tend to use it for re-enforcing hoops and bands on model boilers and cylinders. A metalic spray paint or guilding wax will complete the look of the thing and a few dome head upholstery pins make rather convincing rivets.

So that's the main drive sorted out.

What about some form of fine attitude control in the shape of smaller thruster jets?

Some sprinkler  "roses" from a watering can or shower head might look well.

Carry on that man.

Dr. Q.
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silastic armor fiend
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mercenary, privateer and part-time tinkerer


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« Reply #37 on: April 04, 2009, 05:56:16 am »

right now im pretty much gonna do it as basic as possible, but when i have some more money coming in, i may put some smaller thrusters on. i might even make it an ornithopter, which was my original plan. im going to attach it to a strong leather harness, and build flight controls (again, not right now) on the chest.
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