KR> center spar analysis

Based on a section modulus of 18.5 in3 and yield strength of spruce at 5000 Psi, the center spar should yield at 92500 lb in. bending moment. I don't know how that translates to wing load. On Feb 22, 2015 4:58 PM, wrote: > > Just an idea. We have a gathering coming up in September. I would imagi

KR> wrench?

> > > Does anyone manufacture a ratcheting, open end wrench? ++ Thanks to all that replied. I should have done some "googleing" before asking the question. Larry Flesner

KR> wrench?

Larry Flesner wrote: > Does anyone manufacture a ratcheting, open end wrench? Sears sells the Craftsman #914755 set (SAE), and there's a metric version as well. They ratchet on both the box end and the open end. They were pretty cheap for Christmas and have gone up a bit, but still only $39

KR> center spar analysis. Just an idea. (Repost sorry)

That would be great! On Feb 22, 2015 6:07 PM, "Paul-Visk via KRnet" wrote: > > > Just an idea. We have a gathering coming up in September. I would imagine > there is a set of fwd spars lying around gathering dust somewhere. If we > can get them to McMinnville with some sandbags and do our on

KR> wrench?

Canadian Tire here in Canada sells their 'Mastercraft' brand. I'm sure somebody somewhere in the states sells the same idea. Peter Johnson Kenora, Ontario. - Original Message - From: "Flesner via KRnet" To: Sent: Sunday, February 22, 2015 5:22 PM Subject: KR> wrench? > > > Does a

KR> wrench?

Does anyone manufacture a ratcheting, open end wrench? If not someone needs to and I'd only ask 5 percent commission for the idea. Larry Flesner

KR> those pesky fiberglass splinters

Being involved with using the WEST system in large hull construction, I've found that one way to alleviate the itching is to get into as hot a shower as you can stand, and use a soft, plastic bristle brush and lots of soap to scrub as hard as you can. Don't know if this so much removes the biti

KR> center spar analysis

On Sun, Feb 22, 2015 at 1:29 AM, Flesner via KRnet wrote: > >> >> The Spreadsheet says we should be using aluminum spars to make more >> than 2G load factors. > > > > It's been a long held belief that the WAF's were the weak point i

KR> seat belts...

This is how I did it. On my first KR, I attached the shoulder straps to cables running back to the tail wheel. I then heard of someone almost getting strangled with them in an accident where the tail was sheared off, so came up with this solution. In the incident after the 2013 Gathering, which

KR> wrench?

They do. Opened end ratchet set. $20.00 husky brand. Home Depot. Wouldn't be caught without mine. Dan Prichard Portland, Or Sent from my iPhone > On Feb 22, 2015, at 3:22 PM, Flesner via KRnet > wrote: > > > > Does anyone manufacture a ratcheting, open end wrench? If not someone needs

KR> those pesky fiberglass splinters

Okay, so maybe it's just me but it seems like anytime I have a freshly-cured layup or any fiberglass with a ragged edge and I brush up against it, I've got those itchy invisible glass splinters in my skin and no easy way to see them or get rid of them. Scratching and scraping only breaks them o

KR> seat belts...

GaryH wrote: > Where and how have some of you attached/installed seat belts and shoulder > harness? One way to anchor the shoulder belts (a retrofit if you can't get any further back) is shown at http://www.n56ml.com/n891jf/harness/ , although N56ML's were cables wrapped around the two vertic

KR> seat belts...

At 02:05 PM 2/22/2015, you wrote: >Where and how have some of you attached/installed seat belts and shoulder >harness? >Gary I made the brackets in the photo http://myplace.frontier.com/~flesner/fittings.jpg to locate the belt attach point

KR> seat belts...

Where and how have some of you attached/installed seat belts and shoulder harness? Gary Soli Deo Gloria

KR> center spar analysis. Just an idea. (Repost sorry)

Just an idea. We have a gathering coming up in September. I would imagine there is a set of fwd spars lying around gathering dust somewhere. If we can get them to McMinnville with some sandbags and do our on test. I would be willing to pitch in to help defray the cost. I might be able

KR> test

Did this get posted? I'm not getting my own email posts and not seeing them in the archives. Paul Visk Belleville Il. 618-406-4705 _ppaulvsk at aol.com_ (mailto:ppaulvsk at aol.com)

KR> center spar analysis

Hello netters,over here in Germany ,I had to do a spar and WAF load test for my Kr. Mr. Otto Bartsch from the OUV(the German association for experimentals and a aerodynamic ingeneer at Messerschmitt Boelkow Blohm (MBB) did a very simple but efficient Job.To demonstrate the strength of the spars

KR> wheel, brake, and tire update

KRnetHeads, Although I should have been at the airport installing my "new" brakes yesterday, I hung around the house for a FedEx delivery (which never came) instead. So I took the opportunity to update the brake webpage at http://www.n56ml.com/n891jf/brakes/index.html#matco . I think there's

KR> Subject: center spar analysis

I checked my work in the morning!! The real answere is...I=66.7 in4 (2774.3cm4) so Z= 25.7 in3 (421.1cm3) does this sound more resonable? Pete Original Message - From: Pete and Karen Gauthier To: krnet at list.krnet.org

KR> Subject: center spar analysis

> > >I should probably wait until tomorrow to check my work but I get >I=36.7 in4 (152.7cm4). Z = I/c so Z= 10.2in3 (41.5cm3). >Pete And that means what in non-engineer speak? Larry Flesner

KR> center spar analysis

At 07:41 PM 2/21/2015, you wrote: >has the strength ever been questioned of this design, spars or >anything else? + Yes, many times by many people, especially the WAF's, but nothing to do with actual aircraft has indicated any structural we

KR> center spar analysis

> The complete test was very successful. The very slightly bent on > the WAF's ( pic far right) was the result of a not calculable load > (more than 7 g's supposed by Otto Bartsch) +