Thanks for listening - needed to get that off my chest! haha.
David
On 7/4/2015 2:51 PM, Andrew Budek-Schmeisser tempusfugit02@gmail.com [fairchildclub] wrote:
In regard to using DF, keep in mind that AC43.13 does allow spars to
be laminated, either vertically or horizontally. Finding a good
single-piece blank of DF is tough, but smaller pieces that can be
laminated present less of a problem.
Russ Harmuth uses DF in his full-size Spitfire replica (Allison
powered), and I believe he sourced his lumber from Southern Lumber in
San Jose, CA. I've talked with them; they seem to understand the
requirement for good CVG (clear vertical grain) pieces.
On 7/4/15, Hans Friedebach hans@tsoproducts.com [fairchildclub]
fairchildclub@yahoogroups.com wrote:
> Mike,
> Doug Fir is an FAA accepted and less expensive alternate to Sitka Spruce.
> The drawback is twofold
>
> · it likes to split and splinter and is not as easy to work with as
> Sitka Spruce.
>
> · Weighs more than Sitka Spruce – useful load penalty especially for
> an airplane that is not generously set with useful load to begin with. But
> run the math yourself and figure how many pounds and what percentage of
> useful load it will cost you.
>
> I don’t believe you are likely to see a difference in resale price with Doug
> Fir Spars – most buyers don’t drill down to that level of technical detail
> unless something raises a flag. I have never had a prospective buyer ask
> about useful load on any vintage airplane I have sold.
>
>
> Ask Mike Kelly about his experience building F24 wings and what he advises.
> I know that Marc Stamsta (262) 490-8451
> www.maxaero.net Hartford, Municipal Airport KHXF in
> Wisconsin uses Doug Fir for HOWARD DGA spars (a bit more flexibility with
> useful load on those) He also builds Fairchild wing kits. One way to dodge
> the workability issue is to let someone who does it all the time do it for
> you.
>
> Hans
>
>
>
>
> From: fairchildclub@yahoogroups.com [fairchildclub@yahoogroups.com]
> Sent: Saturday, July 04, 2015 2:02 PM
> To: fairchildclub@yahoogroups.com
> Subject: Re: [fairchildclub] Re: Wing Spars Fairchild 24W40
>
>
> Hans,
>
> I have talked with a couple people who have gone with new douglas fir spars
> instead of sitka spruce. They said this only adds two pounds per wing and
> more strength than spruce. What is your opinion and how do you think this
> would effect the value/resale of the plane?
>
> Thanks,
> Mike
>
> Sent from my iPad
>
> On Jul 4, 2015, at 11:22, Hans Friedebach
> hans@tsoproducts.comhans@tsoproducts.com [fairchildclub]
>
> wrote:
>
> Additional comment re: Michael Thomas original spar use
> My earlier comments were aimed at the airworthiness determination question.
>
> Reflecting on the forum thread, I realize that the issue really goes beyond
> airworthiness into the economics. If Mike has spars lying on the bench that
> means the wings have been totally disassembled. At that stage there is so
> much labor required to build up a set of airworthy wings that the end result
> would not justify the effort and expense. Mike would have at best an
> airworthy “old” wing. Considering the total investment in the finished
> airplane, my sense is that the resale value and re-sale-ability of the
> airplane would suffer more than the cost of using new(though expensive) spar
> stock.
>
> Bottom line:
> although I arrive at the same conclusion, but for a different reason than
> Dave@ranchaero, I would also go for new Sitka Spruce Spars.
> And yes, the old spars can fly once more as braces for new ribs. I’m doing
> that right now with some old retired Stearman spars.
>
> After more than 30 years of buying and selling vintage airplanes I find that
> the “Best” airplane is the most saleable. Not just a question of how much
> you get for it, but can you find anyone with the money. The people who have
> both the desire AND the money will go for the “Best”. Until that day the
> restorer has the enjoyment and satisfaction of having and enjoying the
> “Best”, too, even if it is not done on the basis of economics alone.
>
> Thanks for letting me share these thoughts with you all.
>
> Hans
> From: fairchildclub@yahoogroups.comfairchildclub@yahoogroups.com
> [fairchildclub@yahoogroups.com]
> Sent: Saturday, July 04, 2015 10:00 AM
> To: fairchildclub@yahoogroups.comfairchildclub@yahoogroups.com
> Subject: Re: [fairchildclub] Re: Wing Spars Fairchild 24W40
>
>
>
> This group is a gold mine of information.
>
>
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