Fifth Element : Mangalore Grenade (Mostly 3D Printed)

[PropsToHistory]

Pulled the base .stl(s) from thingiverse. Found the correct maglite and source the acrylic rod (lights) from amazon. The knob/timer, is an RS Components 509-973 Potentiometer knob, which i have finally found and is on its way. But for the time being the 3d printed version will remain as a place-holder.

 

[macropod80]

Nice work.
Did you print in PLA? What's the stuff you've coated it with? I've yet to find anything that isn't just as much of a pain to work with as sanding the raw print.
BTW: have you noticed yet that your blue spines need to be rotated 180 degrees? When folded against the grenade the flat tips should face inwards. This helps the grenade fit into the sleeve better and the rear four ends sit neatly against the handle's ball.

 

[propmainiac]

Wow! Really cool!

 

[PropsToHistory]

Nice work.
Did you print in PLA? What's the stuff you've coated it with? I've yet to find anything that isn't just as much of a pain to work with as sanding the raw print.
BTW: have you noticed yet that your blue spines need to be rotated 180 degrees? When folded against the grenade the flat tips should face inwards. This helps the grenade fit into the sleeve better and the rear four ends sit neatly against the handle's ball.

I noticed what I had done about 20ish seconds after posting online. So it's been corrected. I actually coated it withsimple bondo and sanded it on a lathe to keep it even. I started with 220 grit and worked up to 4000 grit. Primed with automotive primer, sanded again to 3600 then shot it with two coats of testors metallizer lacquer. the shinier bits are rubb n buff.

 

[simon830]

Thats such a smooth finish! I love it. How did you get it so smooth?

 

[PropsToHistory]

Thats such a smooth finish! I love it. How did you get it so smooth?

Thank you. I put on a couple of thin coats of bondo. Chucked it in my lathe and sanded it from 220 to 4000 grit. primered (2 coats) of gray automotive filler primer. Lathe, 400 to 3600. Shot with 2 thin coats of testors aluminum buffing lacquer. done-skis

 

[PropsToHistory]

Update: They arrived. All the way from 'Straya. Spendy, but now it's more accurate.

 

[MattgomeryBurns]

Looks great man. How easy is it to pull in and out of the cover? I was told with my R B Replicas one to avoid doing that or else the spikes would snap off.

 

[PropsToHistory]

 

[PropsToHistory]

Since the potentiometer knobs appear to be made of Unobtainium, I went through several iterations of molds until I got it right. Getting ready to cast the body and other parts. Found the correct diameter aluminum tube for the sleeve and machining the brass spacers. I'll just have to dig up some mini mags and I'll have some kits ready.

 

[PropsToHistory]

Painted up a casting. Couldn't resist sharing. Vallejo Acrylic Metal Color (Aluminum) and Rubb n Buff

 

[eethan]

oh congrats, very nice result!

 

[PropsToHistory]

Gonna do a run of these. posted in project runs about it

 

[eethan]

I thought you were gonna do a run of the whole grenade though when you spoke of aluminium sleeve and mini mags. Is this corect but just for a later date?

 

[Bengrim09]

Painted up a casting. Couldn't resist sharing. Vallejo Acrylic Metal Color (Aluminum) and Rubb n BuffView attachment 1048837

Any idea what product the knob was used on ?

 

[PropsToHistory]

Any idea what product the knob was used on ?

I dont, I've never found any reference for what machines they came from.

 

[Montagar]

Any idea what product the knob was used on ?

IIRC it was from an oscilloscope.

 

[Win7ermute]

View attachment 1025056

This is just friggin cool.

 

[PropsToHistory]

IIRC it was from an oscilloscope.

Do you remember where you found that info?

 

[Montagar]

Here is an example.