Surface coordinance for 511

[djnagle]

If anyone has the surface co-ordinance for the 511 horn, I have a friend that can hog them out of a solid/laminent piece of wood. We would really just need the interior numbers and could design the outside to suite.

[dan fish]

let me know if he ever starts building 511s out of wood I would like a pair

[GM]

I'm curious, how can you measure the inside of a 511/811 without removing the vanes and sawing it in two either down the middle or at the conical/expo flare junction?

GM

[dgwojo]

Does he want to "borrow" a 511B as a model?? I work in Southfield, MI, probably minutes from you, Dave.

[djnagle]

If we need a modle, I will contact you. He has a five access milling machine and if we have the Co-ords we can hog them out in about one hour.

[djnagle]

GM, I have not asked for a quote yet because I did not know if I could get the surface data. If no one has them already, I need to get a quote for that first, then I will get a quote for the actual milling. The horns can be milled out of one solid peice of material.

[GM]

Wow! To have had access to such a machine 20yrs ago! The horns I could have easily built. I'm surprised no one has done wooden clones already.

GM

[Charles Chance]

Outside measurements, subtract out the best-guess metal thickness?

[djnagle]

GM, If need be, we will find a company with a CMM (Co-ordinent (spell) measuring machine) to take the measurments. Most CMM have long arm attachments that can reach in and touch the surface. It would take a touch around the interior diamiter every 1/4 inch or so, moving in a 1/4 inch at a time, all the way down to the bottom of the throat. Once that is done, the data goes into a smoothing program and a surface is developed. I want to avoid the cost of buying CMM time, that is why I asked for a surface, as is not a money making venture - just cool! Once the surface is developed, it is just a matter of laminating boards together until a block is built up, then putting it on the CNC and hogging away. You would not even need to use wood.

[GM]

Yeah, you could do a rough approximation of them, but I was more interested in what, if any advances had been made in measurement equipment. It was still pretty stone age WRT this app when I retired in '94. BTW, a few measurements I just did indicate they're not uniform thickness, so numerous internal points need to be measured using snap gauges for best accuracy.

GM