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Old 1st April 2013, 07:46 PM   #41
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That looks a fab lathe. What is the swing? I scanned through but did not see that.

36 rings of 24mm birch ply glued nay, laminated together is how I made my little mid bass horns.
Router wastes too much material imo so I jigsawed them out.

As David Mcbean made me aware, Hornresp will even output the angle you need for each cut so less finishing is needed.#
Mine are tiddlers compared to what you are planning.
I rely on tapped horns for 100Hz and below. That way I can get away with fairly small mid bass horns.

Have you thought Hyperbolic or Exponential. Needs much less material and mouth termination at low frequencies is not an issue.

I would have thought a Le Cleach profile bass horn was out of the question? A 50Hz Le Cleach is something like 10ft across I seem to remember

Fun and games. I am looking forward to the progress pics etc.
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Old 1st April 2013, 08:20 PM   #42
djn is offline djn  United States
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The inboard swing is 30" and the outboard swing is 86". I "Can" turn something that big, but I'll start small.
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Old 1st April 2013, 08:48 PM   #43
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Originally Posted by djn View Post
The inboard swing is 30" and the outboard swing is 86". I "Can" turn something that big, but I'll start small.
Wow
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Old 1st April 2013, 09:20 PM   #44
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...I "Can" turn something that big, but I'll start small.
Good plan. Something in the 400-500hz range perhaps or smaller still?
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Old 1st April 2013, 09:32 PM   #45
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Love the picture of the 64' version of your beast. Considering the purchaser, something tells me that mold patterns for naval guns may have been the objective. Good luck with getting her up and running!
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Old 1st April 2013, 09:56 PM   #46
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For what it's worth, WD40 is not a good metal lubricant.
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Old 1st April 2013, 10:54 PM   #47
evanc is offline evanc  United States
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Djn, I wish we were neighbors. Very nice machine. Turning is great fun kind of an all or nothing thing...it's good and then the chisel or gauge gets a mind of it's own and the part is ruined. Have fun and be carefully. Unless you have some experience you will probably find scraping the wood away a lot more controllable than cutting the wood away.
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Old 1st April 2013, 11:27 PM   #48
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Quote:
Originally Posted by kevinahcc20 View Post
Love the picture of the 64' version of your beast. Considering the purchaser, something tells me that mold patterns for naval guns may have been the objective. Good luck with getting her up and running!
Cast iron naval guns pre-dates the age of this lathe.
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Old 2nd April 2013, 01:12 AM   #49
djn is offline djn  United States
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Quote:
Originally Posted by robotbunny View Post
Good plan. Something in the 400-500hz range perhaps or smaller still?
I was thinking 1200hz for starters. Just to get the hang of it.

Quote:
Originally Posted by kevinahcc20 View Post
Love the picture of the 64' version of your beast. Considering the purchaser, something tells me that mold patterns for naval guns may have been the objective. Good luck with getting her up and running!
That is what I was thinking too.

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Originally Posted by 454Casull View Post
For what it's worth, WD40 is not a good metal lubricant.
I agree. But it is good for a lubricant which knocking the rust off.

Quote:
Originally Posted by evanc View Post
Djn, I wish we were neighbors. Very nice machine. Turning is great fun kind of an all or nothing thing...it's good and then the chisel or gauge gets a mind of it's own and the part is ruined. Have fun and be carefully. Unless you have some experience you will probably find scraping the wood away a lot more controllable than cutting the wood away.
Evan
I've got a good set of bowl gouges and know how to use them. I am looking forward to turning something big like the pic below but will start small.

Quote:
Originally Posted by radiosmuck View Post
Cast iron naval guns pre-dates the age of this lathe.
The original design was from the turn of the century and my 1959 was one of the last ones to roll off the line.
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File Type: jpg big bowl.jpg (120.0 KB, 211 views)
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Old 2nd April 2013, 02:38 AM   #50
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That's a magnificent machine, djn. Umm..... when do you start taking orders?
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