BC12D Instrument Panel Attach Points

[Scott]

Hi All

I was looking over the Talorcraft Drawing of the instrument panel today and noticed is calls for two screws in the lower outboard corners. The drawing states "drill on assembly .093" and calls for 2 PK screws (see photo). If one drills in that location the fuselage tube gets a hole.

Mine did not have these screws, only the 4 machine screws through the control column mount. I had intended to put a couple of adel clamps in the general area where the PK screws are specified.

Just curious to know if others have these screws and if they are indeed into the fuselage tube.
Cheers
S

[Guest]

Re: BC12D Instrument Panel Attach Points

I do not have the PK screws only the 4 in the column support.

I would not drill holes in the tube.

BTW, where did you get drawings? I have never known of anyone having them other than Forrest.

Dave R

[Hank Jarrett]

Re: BC12D Instrument Panel Attach Points

I don't remember for sure what the machine screw (not PK screw) went into on my 45, but I AM sure it did NOT go into the tube. I think I remember there being a tab welded to the tubes and a Tinnerman nut and machine screw being there (as well as machine screws and nuts going through the control yolk U channels that supports the phenolic blocks for the control shaft (the two screws shown in the dwg to teh left of teh glove box door. That part I AM sure I remember).
Before we get into a prolonged discussion on which way is "right", remember my 45 had been through several rebuilds and what I found there was in NO WAY guaranteed to have been original. I can say for sure there were NO screws penetrating the tubes or any evidence there ever had been (like welded up holes).

Hank

[Hank Jarrett]

Re: BC12D Instrument Panel Attach Points

I don't remember for sure what the machine screw (not PK screw) went into on my 45, but I AM sure it did NOT go into the tube. I think I remember there being a tab welded to the tubes and a Tinnerman nut and machine screw being there (as well as machine screws and nuts going through the control yolk U channels that supports the phenolic blocks for the control shaft (the two screws shown in the dwg to teh left of teh glove box door. That part I AM sure I remember).
Before we get into a prolonged discussion on which way is "right", remember my 45 had been through several rebuilds and what I found there was in NO WAY guaranteed to have been original. I can say for sure there were NO screws penetrating the tubes or any evidence there ever had been (like welded up holes).

Hank

[Scott]

Re: BC12D Instrument Panel Attach Points

I do not have the PK screws only the 4 in the column support.

I would not drill holes in the tube.

BTW, where did you get drawings? I have never known of anyone having them other than Forrest.

Dave R

Agreed, I have no intention of drilling any tubes.

I purchased the drawings from Essco Aircraft. Here is the post with more info: http://vb.taylorcraft.org/showthread...drawings+essco

[PA1195]

Re: BC12D Instrument Panel Attach Points

Some prints:

Gary

[M Towsley]

Re: BC12D Instrument Panel Attach Points

Dave,

I've had a set of those prints for a long time. Definitely handy as the original small ones you see around, (owner's manual?), are very difficult to read. These large ones are nice to have.

[Hank Jarrett]

Re: BC12D Instrument Panel Attach Points

Nice to have?!?!? These are the cleanest scans I have ever seen of these drawings! I have a very early copy of the instrument panel drawing and could never make out the screw call out. These are perfectly clear, and a TOTAL mystery.

The lower outer corner screw call outs are for 518-454 screws. I was really excited. I looked in current supply catalogues and found nothing, which didn't surprise me, but I have my secret weapon. I have all of my fathers Aeronautical Engineering books and most are from the 1930s and 40s, including all of his really old fastener books! Guess what. Even back in the 30s there are NO call outs for a 518 screw! I have a feeling the call out on the drawing was wrong from when the drawing was done. I HOPE I am wrong. Does ANYONE know what an AN 518 screw is? The closest number I could find anywhere was an AN 515 and AN 520, but nothing in between. At least we know the diameter was 3/32". The screws into the control wheel U channels were AN 515-632R6, which is pretty common, but most times I have seen a slot head truss screw, not a round head.

[woodmw]

Re: BC12D Instrument Panel Attach Points

Those look like the drawings Scott posted about a couple of years ago. From Essco. No doubt worth the $15 investment. And you could download PDFs and have them immediately.

http://vb.taylorcraft.org/showthread.php?10689-Drawings-from-Essco&highlight=Panel+drawing

[Guest]

Re: BC12D Instrument Panel Attach Points

Nice to have?!?!? These are the cleanest scans I have ever seen of these drawings! I have a very early copy of the instrument panel drawing and could never make out the screw call out. These are perfectly clear, and a TOTAL mystery.

The lower outer corner screw call outs are for 518-454 screws. I was really excited. I looked in current supply catalogues and found nothing, which didn't surprise me, but I have my secret weapon. I have all of my fathers Aeronautical Engineering books and most are from the 1930s and 40s, including all of his really old fastener books! Guess what. Even back in the 30s there are NO call outs for a 518 screw! I have a feeling the call out on the drawing was wrong from when the drawing was done. I HOPE I am wrong. Does ANYONE know what an AN 518 screw is? The closest number I could find anywhere was an AN 515 and AN 520, but nothing in between. At least we know the diameter was 3/32". The screws into the control wheel U channels were AN 515-632R6, which is pretty common, but most times I have seen a slot head truss screw, not a round head.

Hi Hank,

I think it is S18-4S4 (not 518-454)

My guess is that means slotted head design #18, #4 screw size, 4/16" long, second "S" may mean pointed or not-pointed.

Not an AN part but maybe a Parker-Kalon number.

Dave

p.s. oh yeah, One "S" is probably for slotted and the other is probably for steel

[M Towsley]

Re: BC12D Instrument Panel Attach Points

I forgot to add, no outer screws, or location to mount, on my plane. No outer holes on the original panels of either of my planes. Just the four screws as already mentioned.

[Hank Jarrett]

Re: BC12D Instrument Panel Attach Points

Sounds like you may have solved teh mystery! Too bad that I just found this on Thanksgiving morning.

Parker-Kalon manufacturing to close

Thirty jobs will be eliminated by the end of the year.
By Calen McKinney
Thursday, September 1, 2011 at 3:06 pm (Updated: September 2, 2:59 pm)

Parker-Kalon's manufacturing facility in Campbellsville will close by the end of the year, with a loss of 30 jobs.

According to a statement released last Thursday at about 4 p.m. by Tim Perra, global communications director, the manufacturing facility will close because of a decline in demand for the self-tapping screws that have been produced at the Campbellsville location.

The local facility, known as Stanley Black & Decker, announced its decision to close to employees last Thursday. The facility's 30 positions will be eliminated by the end of the year.

Another small business destroyed and more people loosing their jobs. What a shame. Does anyone have a picture of the S18-4S4 screw? Maybe we can find the same thing from another manufacturer. Wonder what it would have taken to save this company. This is happening way too often.

Hank

Hi Hank,

I think it is S18-4S4 (not 518-454)

My guess is that means slotted head design #18, #4 screw size, 4/16" long, second "S" may mean pointed or not-pointed.

Not an AN part but maybe a Parker-Kalon number.

Dave

p.s. oh yeah, One "S" is probably for slotted and the other is probably for steel

[astjp2]

Re: BC12D Instrument Panel Attach Points

Nice to have?!?!? These are the cleanest scans I have ever seen of these drawings! I have a very early copy of the instrument panel drawing and could never make out the screw call out. These are perfectly clear, and a TOTAL mystery.

The lower outer corner screw call outs are for 518-454 screws. I was really excited. I looked in current supply catalogues and found nothing, which didn't surprise me, but I have my secret weapon. I have all of my fathers Aeronautical Engineering books and most are from the 1930s and 40s, including all of his really old fastener books! Guess what. Even back in the 30s there are NO call outs for a 518 screw! I have a feeling the call out on the drawing was wrong from when the drawing was done. I HOPE I am wrong. Does ANYONE know what an AN 518 screw is? The closest number I could find anywhere was an AN 515 and AN 520, but nothing in between. At least we know the diameter was 3/32". The screws into the control wheel U channels were AN 515-632R6, which is pretty common, but most times I have seen a slot head truss screw, not a round head.

Hank, you can will me those for my library!
��

[Hank Jarrett]

Re: BC12D Instrument Panel Attach Points

If I HAD a set I would! I only have the PDFs, but will most likely order the paper ones. I had no idea they were that clear! I have been suffering with the bad paper ones for years thinking that was as good as it gets.

Hank

[Nefj40]

Re: BC12D Instrument Panel Attach Points

Hank already mentioned it, but I just checked my aircraft out. Even though I don't have the original IP and the tabs aren't being used, they are there on mine.