Search found 15 matches

by braywood
Wed Oct 07, 2020 3:41 pm
Forum: Aircraft Design - General
Topic: Use of Stainless Steel AN bolts in place of CAD plated AN bolts
Replies: 7
Views: 434

Re: Use of Stainless Steel AN bolts in place of CAD plated AN bolts

Thanks Mark - everyone seems to think SS is like jello - no strength at all.
I understand about the galvanic issue - would you think CAD plated AN hardware would be better than SS? There are issues with cadmium/titanium as well. I thought the SS hardware would be less of an issue.

Mark
by braywood
Mon Oct 05, 2020 12:40 pm
Forum: Aircraft Design - General
Topic: Use of Stainless Steel AN bolts in place of CAD plated AN bolts
Replies: 7
Views: 434

Re: Use of Stainless Steel AN bolts in place of CAD plated AN bolts

Hello Mark - I'm making my fittings of titanium (don't ask) so no issue with aluminium. I want to know how the SS AN bolts compare strength wise to the CAD plated bolts. According to the LAS (ACS) site hardware listing, both meet the minimum tensile limit of 125ksi. Yes SS is not as strong, but both...
by braywood
Sun Oct 04, 2020 8:05 pm
Forum: Aircraft Design - General
Topic: Use of Stainless Steel AN bolts in place of CAD plated AN bolts
Replies: 7
Views: 434

Use of Stainless Steel AN bolts in place of CAD plated AN bolts

I would like to use SS AN bolts in place of CAD plated bolts for all fitting attachment on a Pietenpol Air Camper. Is there any problem? If so what would be the issue?
Mark Bowler
by braywood
Sat Sep 14, 2019 2:29 pm
Forum: Aircraft Design - General
Topic: Converted Auto Engines for permit aircraft
Replies: 7
Views: 2942

Re: Converted Auto Engines for permit aircraft

Id love to see a Diesel engine developed for permit aircraft use. Wilksch had one years ago, but it did not really get off the ground..... Most development today is for large, 150+ hp engines. Something 80 to 100 hp would be just the ticket.
by braywood
Wed Aug 07, 2019 10:22 am
Forum: Aircraft Design - General
Topic: EAA Solidworks member benefit (Merged)
Replies: 12
Views: 10475

Re: EAA Solidworks member benefit (Merged)

I've used Solidworks for about 9 years; it is a really powerful package, but it is another language to learn. I took a City and Guilds level 2 course to get started and it helped a lot. Some of the things I have drawn early on, are very awkward - there are always 6 different ways to design something...
by braywood
Wed Aug 07, 2019 10:15 am
Forum: Aircraft Design - General
Topic: Editing LAA Forms
Replies: 2
Views: 963

Editing LAA Forms

I've downloaded several forms from the site and am having trouble saving my work. I can't seem to get around the protection on the .pdf file. I want to be able to share and edit my mod with a friend so we can be sure it is correct. I save my work, but when reopened, it is not complete. What am I mis...
by braywood
Wed Nov 02, 2016 3:16 pm
Forum: Aircraft Construction & Maintenance
Topic: Equivalent Metal Materials
Replies: 5
Views: 3799

Re: Equivalent Metal Materials

Hello Gents - thanks for the replies - I am not really looking to substitute materials, as I know this is a dangerous area. I am simply wanting to know what is equivalent (or better) than the alloy's referred to on the drawings that are either difficult or impossible to source. 4130 is easy. The alu...
by braywood
Tue Nov 01, 2016 2:55 pm
Forum: Aircraft Construction & Maintenance
Topic: Equivalent Metal Materials
Replies: 5
Views: 3799

Equivalent Metal Materials

I'm building a Pietenpol; the original plans were simple - use steel! The 'Wills' approved plans specify several materials that I have had trouble finding, equivalent or otherwise. Is there somewhere I can look up equivalent material qualities/alloys? For example: Steel - S510, 28 ton steel are spec...
by braywood
Tue Jul 21, 2015 2:13 pm
Forum: Aircraft Construction & Maintenance
Topic: Acceptable Plywood Standards
Replies: 5
Views: 3930

Acceptable Plywood Standards

I'm building a Pietenpol and would like to use some American 8 foot sheets of ply to minimize the number of scarf joints that have to be made for Fuselage bottom, sides and spar webs. Can anyone tell me if the MIL-P-6070 standard for ply is acceptable for LAA permit aircraft? I still don't know if I...
by braywood
Tue Aug 13, 2013 4:18 pm
Forum: Aircraft Construction & Maintenance
Topic: Titanium Metal Fittings
Replies: 1
Views: 2358

Titanium Metal Fittings

I am building a Pietenpol, and have found a supply of .050" through .100" sheet in commercially pure grade 4 and .125" in 6AL4V alloy. These are small offcut pieces, but plenty big enough to have the parts cut out using waterjet. Although the commercially pure stuff is not as strong as 4130N, it is ...
by braywood
Sun May 05, 2013 12:17 pm
Forum: Aircraft Construction & Maintenance
Topic: Availability of Spruce
Replies: 7
Views: 5211

Re: Availability of Spruce

Hello Traumahawk - this may be way too late for you (just saw your posts). I am building a Pietenpol and plan on using Douglas Fir. I have selected, purchased, delivered, milled and sanded several large boards to the finish sizes I need - mostly 1" x 1". It is much cheaper, even when you consider th...
by braywood
Thu Nov 15, 2012 10:24 am
Forum: Hangar Chat
Topic: EAA Stearman Sweepstakes Eligibility
Replies: 0
Views: 1287

EAA Stearman Sweepstakes Eligibility

I just read the promotion in the LAA Newsletter about the EAA Sweepstakes to give away a renovated Stearman. You have to read the really small print to know that the Sweepstakes are NOT open to residents outside the USA and Canada. Including this promotion in the Newsletter gives very misleading opt...
by braywood
Wed Aug 24, 2011 11:20 am
Forum: Aircraft Construction & Maintenance
Topic: Douglas Fir - Wood selection Expertise
Replies: 5
Views: 3172

Hello Colin - thanks for your comments. I may take you up on your offer to test. I will likely need all the ammunition I can get to convince all that my wood selection is sound. I would certainly keep you out of the details! Too bad we were not closer - I think you could teach me a lot about wood!! ...
by braywood
Mon Aug 22, 2011 11:53 am
Forum: Aircraft Construction & Maintenance
Topic: Douglas Fir - Wood selection Expertise
Replies: 5
Views: 3172

Hello Steve - been there, done that with my inspector - OK in principle, as long as the wood I use meets the standards for Sitka. I am reasonably familiar with these specs, but would like another assessment, before I turn it to sawdust!
Thanks for the comment.
Mark Bowler
by braywood
Mon Aug 22, 2011 10:23 am
Forum: Aircraft Construction & Maintenance
Topic: Douglas Fir - Wood selection Expertise
Replies: 5
Views: 3172

Douglas Fir - Wood selection Expertise

I am looking for some wood builders in Northern Ireland (Ballymena area) who would be interested in helping me cut up some douglas fir I have purchased, with the objective of using it for my Pietenpol project. I would just like another set of eyes to have a look and get their ideas on selecting the ...