[reluctantsparrow]

I think it would make a big difference Bill. As is, the rig is forced to drag a bunch of line through three pulleys, lots of drag....next tests with a release as you recommend should be truly spectacular.
I am going with the ARPR line mounted near the main suspension strap.
My girlfriend is running into town right now. I am going to ask her pick up some balloons to simulate the pilots head. I might fill the balloons with ketchup and water? No, bad idea, that would attract racoons licking up the pilots brain fluids. We lose too many chickens to those critters as it is.

[Bill Cummings]

I think it would make a big difference Bill. As is, the rig is forced to drag a bunch of line through three pulleys, lots of drag....next tests with a release as you recommend should be truly spectacular.
I am going with the ARPR line mounted near the main suspension strap.
My girlfriend is running into town right now. I am going to ask her pick up some balloons to simulate the pilots head. I might fill the balloons with ketchup and water? No, bad idea, that would attract racoons licking up the pilots brain fluids. We lose too many chickens to those critters as it is.

[reluctantsparrow]

another ARPR line test with the line routed through the mains.



Too much line. Nice impact though, best ever. Maybe the line would end up short enough if it could be attached to the bottom of the harness in line with the mains? Maybe, but my harness does not have anything to attach to in that area......
I held the glider on my shoulders and only allowed as much line as needed for that position. Then I scrunched down into the harness and did a full flare and had to let out just a wee bit more line, but not much.
It was still too much line.

I really should have had a balloon attached to this one.....pilots head hit that nose plate dead center

[Bill Cummings]

another ARPR line test with the line routed through the mains.



Too much line. Nice impact though, best ever. Maybe the line would end up short enough if it could be attached to the bottom of the harness in line with the mains? Maybe, but my harness does not have anything to attach to in that area......
I held the glider on my shoulders and only allowed as much line as needed for that position. Then I scrunched down into the harness and did a full flare and had to let out just a wee bit more line, but not much.
It was still too much line.

The keel release should not stick if you have it releases from a two inch ring instead of the rope loop.

Two inch ring.JPG (23 KiB) Viewed 4255 times

This last test allowed the head contact with the glider.

[reluctantsparrow]

This last test allowed the head contact with the glider.

yes it did, and that was as short as I could make the line and still preserve range of motion. these test are good. We are finding out very easily and quickly what does and what does not work geometrically if nothing else.
And thanks for the heads up on the ring for the release....RS

[Bill Cummings]

This last test allowed the head contact with the glider.

yes it did, and that was as short as I could make the line and still preserve range of motion. these test are good. We are finding out very easily and quickly what does and what does not work geometrically if nothing else.
And thanks for the heads up on the ring for the release....RS

Oh and Carpet or cardboard to protect the basetube rather than relocate.
Or two two by fours.

[Bill Cummings]

Keel reinforcement at front pulley.JPG (37.65 KiB) Viewed 4254 times

Jim, It could be the fish eye lens but it looks like the front pulley is bowing the keel when the helmet hits the nose.
Since in real life the keel should not snap or kink where the pulley meets the keel so it would not be cheating the simulation
to reinforce or splint the keel in that area for testing. (Maybe hose clamp angle iron to the keel for strength.)
Earlier I had thought to suggest to move the front pulley further aft to allow more nose over but I held off due to concern about the keel
not being able to bare up at midpoint from the nose to heart bolt area.

Also this last test the rear keel missed the zip-line this time and let the glider go further into it's summer-salt (sp?)

[Bill Cummings]

Jim,
Consider putting the anchor point of the ARPR 12" up the downtubes.
Or possibly with split bolts 12 to 18 inches on the back wires from the current anchor location.
Don't miss the post above -- and sometimes back up to catch any edit within the 4 hour allowance time for editing.

[reluctantsparrow]

the Bermuda Triangle rope system without a bungee......yes!
this was the most speed acquired so far on a test since I rigged a quick release that dropped away the pullback line and pulleys leaving the airframe to free fall in full dive mode.
Also I did not use any bungee in this test, just one line of 3/16 delron set up in a triangle between the rear flying wires and the harness main suspension. This test was a success. Even at great speed the pilot head area comes to a stop before crashing into the nose of the glider. A huge shock absorption factor comes into affect as the delron line, which is run through pulleys attached to each rear flying wire, pull the rear flying wires together.....
other advantages of this design:
1.no lines draped beneath or under the pilots feet or hands,
2. the ability to push out fully
3,the ability to flare fully
4. full roll control from all pitch positions
5.this design will tow nicely...nothing to the rear to snag the cart with....very clean.
6. lowest drag yet of any design....similar to the drag of the ARPR line but without the drawbacks.
7.when i walked around, in the harness, attached to the glider frame with this thing rigged up....you dont even know its there....ever....once you climb into the harness you wont see it or feel it until you are done flying.....perfecto



Notice (in slow motion) how the mains completely go slack as the load is shifted to the restraint line.
Also notice how far forward the pilot is allowed to travel past the fully stuffed position.....this is all shock absorption travel allowed by the rear flying wires pulling together. Delron, the material used for the restraint, is a very low stretch line. this huge amount of continued forward travel is being allowed by the flying wires pulling together.
All this in a very high speed test. By far the fastest speed attained in any of the tests I have done so far....

This is the design I am going to focus on. I will start by building myself a set of 1/8 inch rear flying wires with the pulleys built in or perhaps just eyelets built in to the rear flying wires......yep, it will work just fine
........just needs a better name....
...later....RS

[Bill Cummings]

the Bermuda Triangle rope system without a bungee......yes!
this was the most speed acquired so far on a test since I rigged a quick release that dropped away the pullback line and pulleys leaving the airframe to free fall in full dive mode.
Also I did not use any bungee in this test, just one line of 3/16 delron set up in a triangle between the rear flying wires and the harness main suspension. This test was a success. Even at great speed the pilot head area comes to a stop before crashing into the nose of the glider. A huge shock absorption factor comes into affect as the delron line, which is run through pulleys attached to each rear flying wire, pull the rear flying wires together.....
other advantages of this design:
1.no lines draped beneath or under the pilots feet or hands,
2. the ability to push out fully
3,the ability to flare fully
4. full roll control from all pitch positions
5.this design will tow nicely...nothing to the rear to snag the cart with....very clean.
6. lowest drag yet of any design....similar to the drag of the ARPR line but without the drawbacks.
7.when i walked around, in the harness, attached to the glider frame with this thing rigged up....you dont even know its there....ever....once you climb into the harness you wont see it or feel it until you are done flying.....perfecto



Notice (in slow motion) how the mains completely go slack as the load is shifted to the restraint line.
Also notice how far forward the pilot is allowed to travel past the fully stuffed position.....this is all shock absorption travel allowed by the rear flying wires pulling together. Delron, the material used for the restraint, is a very low stretch line. this huge amount of continued forward travel is being allowed by the flying wires pulling together.
All this in a very high speed test. By far the fastest speed attained in any of the tests I have done so far....

This is the design I am going to focus on. I will start by building myself a set of 1/8 inch rear flying wires with the pulleys built in or perhaps just eyelets built in to the rear flying wires......yep, it will work just fine
........just needs a better name....
...later....RS

Great job Jim.

This time I didn't jump ahead to the crash -- I let the excitement build!
For a name for it if you change it could be:
1) Hawk Arrester.
2) Guardian Angel.
3) Thetis' Gift. (Achilles mother.)
4) The Anchor.
5) Splat Arrester.
6) Hawksaver.
7) Safer Splat.
8) You're Welcome.
9) Not so fast.
10) Whack Mitigation.
11) Zero Landing Points.
12) Golden Hammer.
13) The Anti St. Peter Greeter.
14) Hold My Beer and Watch This.
15) Spot Lander tool.
16) ---------

Think Ahead.JPG (8.95 KiB) Viewed 4247 times