Does 'Dahlstrom V-1" ......?

[mhorowit]

Does "Dahlstrom V-1" mean anything to anyone?

He're how we got to that question (I know many are wondering where all these questions come from...).

I was thinking about 'owner produced parts', and starting small, I looked up the 'bug'/clamp that holds the brake cable up near the pedal (PN: B-523).
Instead of describing the thickness of the metal, there is the notation "Dahlstrom V-1". GOOGLING for "Dahlstrom +metal", there is a metal fabrication firm with that name.

Is Dahlstrom V-1 then simply a long strip of channel-shaped metal that CG bought from the Dahlstrom Company, which he then cut to the desired length? - Mike (who was first thinking about welding one, then thinking about bending metal, then jumping on the 'he bought it that way' solution)

[Carl Ellis]

Re: Does 'Dahlstrom V-1" ......?

Mike -

Yes, Dahlstrom is a manufacturer of extruded metal. When I built my trim fairlead from the Taylorcraft drawings I encountered this; some material was called out by the Dahlstrom part number.

I was able to download their catalog and find the profile in question. However; I did call about availability of the material and was disappointed to find that it was a specialty order with a minimum of $1500. The catalog does not specify the metal; that is up to the customer. They didn't have any scraps as the last order was placed in 1995 by some company that I couldn't locate.

I solved this by determining the type of metal (Dahlstrom told me and Taylorcraft confirmed) and had the part machined out of 1010 (mild steel) barstock to the dimensions indicated in the parts catalog.

BTW - they have a .PDF catalog that you can download.

http://www.dahlstromrollform.com/pdf/drfcatalog.pdf

Hope this helps,

- Carl -

[mhorowit]

Re: Does 'Dahlstrom V-1" ......?

Thank you Carl - another mystery solved. I imagine we'll find several brackets that arrived at the Tcraft factory as extruded pieces that got formed and drilled before becoming parts. - Mike

[Robert Lees]

Re: Does 'Dahlstrom V-1" ......?

Mike: photo (with dimensions) here

[Carl Ellis]

Re: Does 'Dahlstrom V-1" ......?

Thank you Carl - another mystery solved. I imagine we'll find several brackets that arrived at the Tcraft factory as extruded pieces that got formed and drilled before becoming parts. - Mike

Mike -

I only needed 2 1/2" of the channel so it was "reasonable" to have it machined ($100) which included all the drilling required for the piece. Also the loads are almost non-existant on that particular part. I don't know what, if any, strength differences exist between an extruded/formed part vs one that is machined from bar stock. Something for you to consider.

- Carl -

[mhorowit]

Re: Does 'Dahlstrom V-1" ......?

Mike: photo (with dimensions) here

Yup, that's the beast/'bug'. Based on the earlier messages, that's a 1" length of channel stock identified as Dahlstrom V-1. - Mike

[mhorowit]

Re: Does 'Dahlstrom V-1" ......?

Mike -

I only needed 2 1/2" of the channel so it was "reasonable" to have it machined ($100) which included all the drilling required for the piece. Also the loads are almost non-existant on that particular part. I don't know what, if any, strength differences exist between an extruded/formed part vs one that is machined from bar stock. Something for you to consider.- Carl -

Carl - what you did was undoubtedly the economical way to go. In my case, I have been know to spend resource WAY over what it would cost to buy the part just for the satisfaction of making the part.

What I would be interested in would be if I welded the part together, would the FSDO see that as an acceptable substitute? It would be interesting to sit down out at Dulles (where the FSDO is) with the b'print and a made part and see if he'd accept or reject the use. - Mike

[Carl Ellis]

Re: Does 'Dahlstrom V-1" ......?

Mike -

Are those pedals and pulleys going to work for you?

- Carl -

[Robert Lees]

Re: Does 'Dahlstrom V-1" ......?

that's the beast

Well with a very small flat piece of the appropriate thickness of 4130, a vice (or vise) (or press) , and a drill, you could make them?

Excuse my hesitation: but why do you need to purchase a 1" section of Dahlstrom, when in two minutes flat you could make it?

Rob

[mhorowit]

Re: Does 'Dahlstrom V-1" ......?

Mike -

Are those pedals and pulleys going to work for you?

- Carl -

Haven't received them yet - Mike
At least my wife hasn't said - "look here, you got a package".
When should I have got 'em? - Mike

[mhorowit]

Re: Does 'Dahlstrom V-1" ......?

Well with a very small flat piece of the appropriate thickness of 4130, a vice (or vise) (or press) , and a drill, you could make them?

Excuse my hesitation: but why do you need to purchase a 1" section of Dahlstrom, when in two minutes flat you could make it?

Rob

I would do so only if I couldn't figure how to bend them neatly. I've never worked with a 'brake' and don't know how small a piece they can work with, or how far one bend can be from the other.

Oh, I don't need the part. This is simply a 'what if' - Mike

[Carl Ellis]

Re: Does 'Dahlstrom V-1" ......?

Well with a very small flat piece of the appropriate thickness of 4130, a vice (or vise) (or press) , and a drill, you could make them?

Excuse my hesitation: but why do you need to purchase a 1" section of Dahlstrom, when in two minutes flat you could make it?

Rob

Rob - take a look at the thickness of channel wall. Go try to make an acceptable reproduction out of bar stock in any reasonable amount of time. You must have a much better drill than Mike or I have access to.

- Carl -

[Robert Lees]

Re: Does 'Dahlstrom V-1" ......?

a much better drill

I doubt it for this purpose, Carl. It's "only" a cable clamp, after all. For precision work, I get my local machinist to help me out. When I have made these "bugs", I just drill clearance holes; no tight tolerances are really required.

I confess that I do use a drill press for drilling, but that is more to do with clamping safety in holding small parts than accuracy (I value my fingers).

Rob

[Carl Ellis]

Re: Does 'Dahlstrom V-1" ......?

Mike -

Another way to go would to cut down some 1/2" square tubing. I have an ~12" section that I would let go for the price of postage.

Or you can order from Dillsburg Aero.

- Carl -

[mhorowit]

Re: Does 'Dahlstrom V-1" ......?

Mike -

Another way to go would to cut down some 1/2" square tubing. I have an ~12" section that I would let go for the price of postage.

Or you can order from Dillsburg Aero.

- Carl -

Carl -
1. we're miscommunicating. I was musing; I don't need the part. I was doing a "what if".

2. I contacted Dillsburg and order scrap 4130 to practice on. The guy on the other end is a TALKER! (but quite interesting). He asked what I was working on and I told him I was just practicing. He asked what type of a/c, then said he'd put a package together. Then he spent :15 telling me that I should weld with 1' lengths of tubing instead of 3-4" lengths in order to get a good idea what the warping and heat sinking would be. Probably worth a trip up there just to look around. GOOGLE for 'dillsburg aero' and you'll see an interesting article about his chicken shacks - Mike