Bottom Cowl on BC12D

[astjp2]

Re: Bottom Cowl on BC12D

If you are looking at the MS-20257 it may be a MS part, but it is NOT the original used from the factory. You can't just change from an original part to a different one (even if it is an MS one) without approval. Maybe I am looking at the wrong part number. Which number are you saying to use?
Hank

You are wrong on that one Hank, its hardware and you can substitute hardware as a minor alteration. I used the smaller one, I like the extruded hinge, it seems to last longer....Tim

[Hank Jarrett]

Re: Bottom Cowl on BC12D

If you are looking at the MS-20257 it may be a MS part, but it is NOT the original used from the factory. You can't just change from an original part to a different one (even if it is an MS one) without approval. Maybe I am looking at the wrong part number. Which number are you saying to use?
Hank

[astjp2]

Re: Bottom Cowl on BC12D

If you want to stay legal, you need the MS hinge. Its not that expensive that you cant afford to buy the real $dit. http://www.gen-aircraft-hardware.com/
I use 3003H-14 .032 for the top cowl, I then use a shrinker on the front to raise it to clear the REM37BY plugs. The aluminum is abour 50.00 per sheet. Tim

[Marv]

Re: Bottom Cowl on BC12D

Check the site out below. Could these possibly be the correct hinges. They have them in steel or stainless steel whith mounting holes and without. http://www.hardwaresource.com/hinges...inuous+Hinges/ Whatever they cost it would be better than making them. Marv

[Hank Jarrett]

Re: Bottom Cowl on BC12D

I am going to need to make new top cowls for the 41 (I HATE those cowl bumps for the long plugs). What are you using to make yours? Do you have drawings or are you just using the old ones as a sample? My old ones are pretty bad. They fit terrible and have a couple of piano hinge in the middle. I have managed to make a nice set of front and rear hinge ends and a nice set of the inter-curled hinges (there MUST be a name for those "wound into each other" hinges), but I need to start thinking about making the flat sheet metal parts and the stiffeners.

For anyone interested, DO NOT think about trying to make those goofy hinges! They were a RIDICULOUS amount of work and I am lucky to still have ten fingers. If you don't get them PERFECTLY straight and shaped "just right" they jam and tear apart. Another of those little things that are JUST NOT WORTH trying to do yourself. There HAS to be someone with the tool to make them somewhere. Whatever they want to make them, PAY IT!

We all need to post some pictures of what we make to help each other get them right.

Hank

By the way, there is more than just the short and long lower cowls. Some of the early short ones were NOT made from flat sheet. They were worked on an English Wheel or draw formed with a distinct "bowl" shape to the bottom. The shaped ones looked really nice.

[Larry Lyons]

Re: Bottom Cowl on BC12D

We are in the process of making new cowl and hood for the long mount for Tims 46 Rob. Hope ours look as good as yours when done. L

[Robert G. Hamm]

Re: Bottom Cowl on BC12D

Mine has patches on top of patches. The last ones are made of steal plate to stop the crack in the first patch. Hope the new one turns out something like Robert’s.

Bob

[Hank Jarrett]

Re: Bottom Cowl on BC12D

Kripes Robert, If my cowl looked that good my wife would want it for a coffee table!
Hank

[Robert G. Hamm]

Re: Bottom Cowl on BC12D

Thanks. Maybe my louvers are correct. Super looking sheet metal work.

Bob

[Robert Lees]

Re: Bottom Cowl on BC12D

I've seen lots of varieties on bottom cowls on BC12D models, and to be honest, I don't know what is the "correct" version.

If the photo below helps, this is what I have on mine.



It's difficult to show the louvres...perhaps the attachment below helps...just imagine the firewall 18" above the carpet.

[Robert G. Hamm]

I have a totally messed up bottom cowl on my BC12D. The lovers seem to be backwards to me. They are formed inwards with the cut up forward. Can someone send me a picture or tell me how they are supposed to be?