Hi Guy's,

I need to make a funnel for my blaster. I can not work out what size to cut the sides for it as i know they are not the same.

It needs to be 37" x 25" and 25" deep with a 4" square hole at the bottom to empty it.

Can anyone help with a formula or dimensions please.

Cheers, Darren.

Just lay out the two trapezoids directly on the metal or plywood you will be using. Here is a diagram of one way to lay them out. This assumes you don't need to be EXACTLY 25" high. If you do, post that info and I can calc the lengths you need.

Thats brilliant Willy's.

I work in metric so the dimensions come out at 37.2" x 25.2" x 24".

I see how you have done it now so i should be ok.

Thanks Bud, Darren.

o dear, edit your post now before willys goes off the deep end on metric system!!

Ain't no way I agonna use that hippie, pinkie, commie, wuss measuring system!!

I apologise for blaspheming guys.

I was brainwashed at school, aged 5, just as i had learned to read and write and do maths in feet and inches.

We have the morons in Brussels to contend with, who are trying to take over our country through the back door.

Our produce is no longer allowed to be sold in pounds and ounces, but kilograms.

Will not mention the "M" word again. Darren.

To get the finished height of 25", the 37" wide side will require a sheet 27.115" Long, and the 25" wide side will be 30.516 long. +/- .001 decimal points. Your milage may vary... The trapezoidal legs need to the same like Willys said.

Try it in cardboard first to BE SURE.

Wanna see something close to what your doing? Look at entry #112 in my project journal.



WHAT MATERIALS? If metal, be sure to make it thick enough to edgeweld (16 ga), or extend the width on trapezoid side to add a flange to either spotweld, plugweld, tech screw,bubblegum, etc.

If wood, you will need to add to one side for overlap or plan on some sort of internal support.

Good luck, and don't forget to try it in cardboard first.

Cheers Beenaway2long,

I had actually already borrowed your grid idea. I have made the cabinet to be lifted off the base so i can put large, heavy items on it. Hence it needs to be very strong.

I intend to put complete motorcycle engines in it, on a turntable, all orifices being blanked with silicone and tape, in order to avoid stripping them to clean and paint.

The funnel is the last bit, so thanks for the help. I might put some pictures in my journal in case they are useful.

Thanks a million, Darren.