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Recent posts by: avcase

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Last Indexed: 04/20/14 11:51 PM
Last Post: 04/20/14 11:49 PM

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Topic Title Forum Author
Re: Far out arrow topic (reply)
There are some very good sources out there about aerodynamics of rockets which are applicable to arrows. For example: http://sargrocket.org/Documents/Estes/TR-11.pdf
Primitive Flight Shooting

avcase

03/07/14 6:04 PM
Re: Far out arrow topic (reply)
This is how I mentally picture what will happen. The softened shape will compress where the pressure is highest. This highest pressure area is right at the center of the nose of the arrow, pushing it rearward. As the arrow does this, it...
Primitive Flight Shooting

avcase

02/21/14 6:20 AM
Re: Allen and Woodbear (reply)
I have the impression that the hysteresis in a material starts to rapidly increase as the strain approach the yield point. Wood and composites don't have a sharply defined yield point like steel, but it seems to suddenly jump up rapidly...
Primitive Flight Shooting

avcase

02/19/14 1:39 AM
Re: Allen and Woodbear (reply)
Given that the strain is the same for both cases, my guess is that the hysteresis would be about the same. But, I am far from an expert on this and others have done a lot more research into it. Alan
Primitive Flight Shooting

avcase

02/18/14 3:00 AM
Re: spine? (reply)
I was measuring some of my wood/non-bamboo flight arrows. I find it interesting that the primitive flight rules single out forge wood shafts in the rules. Given a minimum 23" arrow length, they are not competitive. They are either too...
Primitive Flight Shooting

avcase

02/03/14 11:47 PM
Re: spine? (reply)
They are called hex-shaft arrows. -Alan
Primitive Flight Shooting

avcase

02/03/14 12:49 AM
Re: The Vorderheubronn flight arrow massacre (reply)
Michael, I really like this bow! How heavy is the arrow for the very high speed chrono results? What are your plans for it? You can save some broken arrows by using a carbon arrow of the same mass for the chrono shots. Alan
Primitive Flight Shooting

avcase

01/09/14 11:03 PM
Re: 2011 Tonkin Cane Composite Flight Bow (reply)
Dan, That jig for shaping bamboo strips is pretty cool! It is probably worth taking some time to check out the fly-rod builders since we share so much in common: adhesives, heat treating, maximum stiffness for minimum weight,...
Primitive Flight Shooting

avcase

12/05/13 12:06 AM
Re: 2011 Tonkin Cane Composite Flight Bow (reply)
Steve, You are extremely generous and bring a ton of fun and energy to the sport. You have me thinking about my archery "bucket list". I am sure it is an oversight, but I don't see a prohibition against using a foot-held bow in the...
Primitive Flight Shooting

avcase

12/04/13 11:05 PM
Re: 2011 Tonkin Cane Composite Flight Bow (reply)
Dan, I took some pictures during the building process and will look for them. I'll share some lessons learned. If I were to do it over, I would choose a more conventional looking handle with an simpler glued on overdraw instead of a...
Primitive Flight Shooting

avcase

12/03/13 7:57 PM
Re: 2011 Tonkin Cane Composite Flight Bow (reply)
Dan, I will share how I made this bow. It was an exercise in patience for sure and I certainly haven't given it the kind of sustained effort to fully explore the potential. I started with dozens of bamboo splits, similar to what I use...
Primitive Flight Shooting

avcase

11/25/13 4:36 AM
Re: Linen for your bow strings! (reply)
I have some rolls of linen that may be "latexed". The thread appears incredibly smooth and tight with no fuzz. At first glance, I thought it must be the best ever. But after measuring break strength and string mass, I found that the...
Primitive Flight Shooting

avcase

11/20/13 6:31 PM
Re: 2011 Tonkin Cane Composite Flight Bow (reply)
Dan, I was just thinking about that bow recently. I haven't done much with it since I fixed the lower limb where it blew out a large splinter at the 2011 flight shoot. I would like to take an inch off each end and see what kind of...
Primitive Flight Shooting

avcase

11/20/13 5:30 PM
Re: Linen for your bow strings! (reply)
I haven't tried that before. There is a large mix of random old stock that comes up for sale from time to time and it is really hard to tell how good it is going to be without seeing it and testing it. Barbour's flax sinew is usually...
Primitive Flight Shooting

avcase

11/04/13 6:36 AM
Re: spine? (reply)
Adam, I took some measurements on the Tonkin arrow Steve shot for his 50# simple composite record this year. The maximum diameter of that arrow is .234", highly barreled, and an overall length of just a little over 26". I believe...
Primitive Flight Shooting

avcase

10/29/13 3:41 PM
Re: US flights 2013 (reply)
I hope to see many new participants for 2014. It shaping up to be a FANTASTIC event. In the past, the number of attendees at this event has rarely been large, but we all make up for that with our enthusiasm and interest in optimizing...
Primitive Flight Shooting

avcase

10/03/13 4:16 PM
Re: US flights 2013 (reply)
Michael, There haven't always been large numbers of people at this event for a number of reasons. First, the Bonneville Salt Flats is a very remote location which is very unique and has a lot of history for breaking records, but it is...
Primitive Flight Shooting

avcase

09/11/13 5:13 PM
Re: US flights 2013 (reply)
I was looking at my search pattern on the GPS and there is a large area unexplored to the right of the shooting line starting around 1-mile out from the shooting line. You will find me there looking on the Wednesday before the 2014...
Primitive Flight Shooting

avcase

09/10/13 6:04 PM
Re: US flights 2013 (reply)
I was thrilled that for once, I exceeded my personal goal without disaster or injury. That mean a lot to me. I think James exceeded the mile in 2012. We never found that arrow either. I used my GPS to mark the shooting line and...
Primitive Flight Shooting

avcase

09/10/13 2:05 AM
Re: US flights 2013 (reply)
I will confirm but I believe all Broadheads shot in the Modern Asiatic were 500 grains minimum. We are trying to streamline the broadhead arrow requirements across all classes. Unfortunately, it isn't an easy thing to do after records...
Primitive Flight Shooting

avcase

09/09/13 6:39 PM
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