Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Madden Cowl

Matronics Email Lists Forum Index -> Tailwind-List

View previous topic :: View next topic

Author Message

tomlc(at)earthlink.net
Guest

Posted: Mon Jan 08, 2007 3:23 pm Post subject: Madden Cowl

I am starting work on my Madden cowl to match  the top and bottom halves. 

  

 1.) In taking some preliminary measurements before  I trim, I have determined that the cooling ducts will have only about 2.5  inches of vertical openning. Does that come close to what any of you  have?

  

 2.) One last thing:

 The bottom section of the cowl has a mold die  mark on each side. There is no mark on the top half. I assume the die mark is  used to trim the lower cowl first, to make it square and level, and  then the top half is brought down and trimmed gradually as necesary to fit.  

 However, when viewed from the front of the  cowl, if I trim the bottom half along that die mark, the cut line will  not pass through a verticle area of the cooling duct's outer  border, but slightly in the lower curved portion of the duct's border. This  would not allow the top half to mate very precise with the bottom half,  because the top half's cut line will be it its verticle area of the cooling  duct. 

 To overcome this, one would need to trim the lower  cowl about a 1/2 inch above the die mark. This would move the cut line  higher, into a more verticle part of the cooling duct, and provide  better alignment when mating the cooling duct halves.

 But my lower cowl doesn't have a 1/2 inch  material above the die line, only about a quarter inch. Madden appears to have  cut off the fiberglass within a quarter inch of the die mark when making  the bottom half. This doesn't leave enough material to work  with. I would have to reshape the outer lower curved portions of the  cooling ducts if I cut along the die mark.

 Is this a common problem with this cowl or am I  approaching this incorrectly? 

 The nice cowl in the photo in the recent post  regarding "Conrad's Shop" dosen't appear to have had to the problem I foresee  with mine.

 Thanks,

 Tom Cummings

 Sulphur, La.

  

   [quote][b]

- The Matronics Tailwind-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Tailwind-List

jclement000(at)centurytel
Guest

Posted: Mon Jan 08, 2007 6:15 pm Post subject: Madden Cowl

Tom, 2 3/8 - 2 1/2" opening is about right.

The top and bottom doesn't fit real good, you can get it closer using a heat 

gun and doing some glassing and sanding. The scribe lines were put in the 

mold as a guide several years ago from one of my TW cowls. The upper and 

lower mating line should be centered in the intake opening. The spinner 

opening should be 11 3/8 - 11 1/2".  Jim



---

- The Matronics Tailwind-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Tailwind-List

tomlc(at)earthlink.net
Guest

Posted: Mon Jan 08, 2007 7:39 pm Post subject: Madden Cowl

Thanks Jim and everybody,

Knowing ahead of time that glassing, bondo, filling, and sanding are 

required makes me feel better about how to correct the misfitting cowl 

halves. I can reshape those intake opennings.

Thanks again,

Tom Cummings

---

- The Matronics Tailwind-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Tailwind-List

Display posts from previous:

	Matronics Email Lists Forum Index -> Tailwind-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum