Thank you for your comments.
You always want to be tight in your harness PG or PPG. Sliding in the harness playing catch is not a good thing for it induces all kinds of unwanted side sliding movements. Always think Spandex ;-). We used to actually cut the sides of the seat plate 1cm at the time (PG) until the side skirts of the harness were really pressed against the hips which is not so much an issue with PPG because of the way the harness is connected to the side bars.
The seat extension helps comfort-wise and was invented by SUPAIR for the early PG harnesses (early 90’s).
I am familiar with Parajet, I sold a few to my students long ago. Parajet’s early PPG design was taken after the Japanese company called DK ( I was their US. distributor when they were still in business) and when they closed shop. The owner of Parajet purchased the leftover DK part surplus to start Parajet in the UK.
Parajet’s original PPG designs were almost a carbon copy of the DK. Whisper.
You will see me taking off with the first “Whisper” in the US. at the time in this video https://www.youtube.com/watch?v=-wWFflIt3p4 Notice the harness with a seat extension. I beat the altitude Florida PPG record a year or so later with the small DK “Beat” motor (Boxer engine). It was not near as powerful as today’s machines but did the job just as well. Those flights were made in the mid 90’s. The first one was in Florida, the second one in New jersey, USA., the third in Mexico for a PPG Guinness World. The 4th video was in New Jersey. The last sequence is an interesting one because it was a prototype I had designed was the lightest PPG in the world at 17.9lbs. I was flying a higher performance NOVA wing. The harness was a true PG harness with a full seat extension, a dorsal reserve parachute container (nobody has that feature today and never did), side hip protectors with fiberglass cups + medium density foam, foot-rest, which you will see me using (by hand, because it was not heavy enough , full speed-bar, side storage pocket. It was a PG harness, and because of it I was able to weigh-shift as well as with any paragliding harness which was impossible to do and still is not with today’s PPG designs because of the frame configuration preventing it. You will only get a partial weigh-shift.
I came up with a different system with the motor connected to the harness without a frame.
The risers attachment points were exactly the same as with paragliding. The motor was attached with industrial velcro and could be removed in 30 seconds from the harness. Having true PG connections allowed me to pull massive “Ears” the way we used to do it before the “Split “A" risers" came along, by reaching high up into the outer “A” lines. But then, PPG pilots could not reach high enough to grab them because of the higher carabiners connection points compensating for the motor weight tilting the pilot backward. At the time most PPG machines were equipped with “J” bars ( inverted bars riding over the pilot’s shoulders ). Eventually harnesses with an “A” frame design for better load distribution (more stable than the side bars and good for beginners - see 1st, 2nd and 3rd flight in the video) were invented with built-in webbings sewn into the harness - the carabiners were connected at the top of the “A” shaped tandem riser-like design. Then someone came out with the side bars/Swan-Neck bar/Weight-shift bars we know today as an option for more active flying.
You are correct, harnesses have a sliding seat-plate system nowadays enabling the pilot to get into the harness more easily, but there are still folks out there regardless of the brand who need a bit of help getting inside the seat, and a foot-rest is good for that. When not used to it during takeoff, new pilots will sometimes have a hard time backpedaling to grab the bar because of the relative windspeed pushing it back a bit. Taking off trying the find the foot-rest with the motor blasting behind one’s back can become a bit overwhelming.
You should not have to adjust your seat extension in flight. Once the harness is correctly adjusted during a hang-test on the ground, it can stay that way for good. I have flown PG with the same Split-leg harness for the last 7 or 8 years and never had to adjust it. Same deal with my OpenPPG and other machines I flew or designed.
PPG harness seat extension:
USHPA Advanced Paragliding Tandem Instructor
USPPA Certified Powered Paragliding Instructor
GMI Paragliding - Powered Paragliding School
On Aug 16, 2019, at 5:17 PM, Toby Obermeit via OpenPPG Community firstname.lastname@example.org wrote:
I used a footrest to help me get into my harness when I had the miniplane PSF. I just could not get into it easilly without it. I think my harness may have been too small in hindsight.
But now, with the parajet zenith, that harness is designed so well that the seat just pops into position naturally, and easy to pop out of too…I would suggest you spend some time hang testing and practicing getting in and out. and be sure to adjust the harness well. getting those leg straps just right makes a huge difference…I never moved the foot rest to the new machine because it was not needed, the harness has a front “recliner” flap that you can adjust in flight…probably not as comfort as the foot rest, but a step up in comfort anyway.
Visit Topic to respond.
To unsubscribe from these emails, click here.