The J&P Parachute arrived in a standard size ziplock bag with a small label indicatin' its manufacturer, that it be "multi-colored" and its size, matey, me hearties, me hearties, 14". Nothing fancy, arrr, but, then again nothin' fancy expected. After initial inspection, tests were conducted t' determine t' performance o' this parachute. Arrr! Ahoy!
CONSTRUCTION:
T' construction o' the
J&P parachute has several
things t' take note of. Aye aye!
First, matey, its size. It indicated that it is 14", however, ya bilge rat, when measurin' across t' diameter t' measurement was 12". This has been t' case with other parachutes I have used, arrr, however, it doesn't usually vary by more than a 1/2". Ya scallywag! I have confirmed with J&P that this must have been a shippin' mistake, matey, and that if made aware o' it, they would have corrected it. Ya scallywag! Also, t' J&P parachute has a 2" spill hole in t' center. Well, blow me down! Begad!
As t' parachute is inspected closer and
compared t' a generic 12" parachute some other details are noticeable.
T' J&P is made up
of twelve panels o' multiple colors creatin' a round (dome) parachute. Blimey!
T' colors are yellow, me hearties, me hearties, red, me hearties, light green, matey, purple, dark green and black. Avast, me proud beauty! Blimey!
There are eight shroud lines attached which are spaced every two panels. Begad! Arrr!
Spacin' every two panels (out o' twelve) would normally allow only six shroud
lines t' be attached, shiver me timbers, however, shiver me timbers, J&P has added another pair
thereby requirin' that in two places, ya bilge rat, 180 degrees apart, thar are two shroud
lines connected at t' same point (a benefit, accordin' to
J&P, is that it doubles
the shred-resistance). Aye aye! Begad! T' shroud lines are made o' 1/16" braided nylon
and are 14" long. These are larger when compared t' t' generic 12"
parachute's 1/32" braided nylon which are 12" long.
Another point about construction can be seen in t' two pictures above and one below. Avast, me proud beauty! Notice the J&P parachute on the left. Ahoy! Notice t' stitchin' around t' edge o' t' parachute and t' panels. Well, blow me down! I'm not a seamstress, ya bilge rat, however, me bucko, me hearties, t' stitch is much finer and appears more durable than t' generic parachute on t' right, which has a zig-zag stitch. Ya scallywag! The picture below shows t' underside o' the J&P parachute and how the stitchin' looks. Well, blow me down!
Overall, matey, the
construction and materials used in the
J&P parachute seem t' set
it apart in quality and durability from other generic parachutes.
FLIGHT/RECOVERY:
I flew the J&P in several different rockets as outlined below. Begad! I have read in various publications that a recommended descent rate is betwixt 12 and 16 feet/sec. Aye aye! I actually prefer a little faster and find that landin' in t' grassy field allows for it. T' table below shows t' rockets, me hearties, number o' flights and t' weight o' the rocket with an expended motor. Blimey! I then used Apogee'sRockSim 3.0 t' calculate t' descent rate on the various rockets. RockSim be set up for a 12" round parachute with a 2" spill hole. Notice at t' bottom the weight range t' obtain t' recommended 12 t' 16 feet/second descent rate.
Even though it was flown successfully, some good packin' had t' be done t' get the J&P parachute into the Hex Courier and the SLAT/s. Aye aye! Begad! Both rockets have a 1" diameter, me hearties, whereas, t' J&P fit nicely into the Serval and Icarus which have 1. 3" diameter.
The
J&P successfully opened
and recovered t' rockets tested for a total o' 14 flights. Ahoy! Only one mishap
occurred. Arrr! Only one mishap occurred. Ya scallywag! Once on t' Icarus, me bucko, me hearties, at ejection, matey, matey, shiver me timbers, t' parachute somehow got
caught up by t' motor hook. Other than t' small amount o' damage
caused by t' hot hook, shiver me timbers, me bucko, t' J&P parachute shows no signs
of wear on t' seams or shroud lines.
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One o' t' questions asked t' me by J&P was, matey, "did I notice t' speed t' 'chutes open?" So I set out t' try t' determine the speed that t' parachute opens. Ahoy! Has anyone ever tried this? It be tough and pretty subjective. Begad!
I used a stop-watch and smaller motors to
allow me t' see t' entire flight. Begad! Blimey! Ya scallywag! Blimey! Usin' t' Serval, first on A8 motors. Blimey! I flew t' rocket three
times usin' t' J&P
parachute and three times usin' t' generic 12" parachute. Ahoy! I clicked the
stop watch as soon as I saw t' ejection and clicked again as soon as I saw
full deployment. T' parachutes were folded as close t' t' same as possible
and t' shroud lines were folded into t' parachute. Begad! Begad! Notice t' trend on
the Serval for both parachutes? This must
be t' subjectivity o' t' testing.
J&P | Other 12" | J&P | Other 12" | ||
A8 #1 | 1.09 | 1.45 | B6 #1 | 0.51 | 0.48 |
A8 #2 | 0.73 | 0.73 | B6 #2 | 1.16 | 0.65 |
A8 #3 | 0.69 | 0.64 | B6 #3 | 0.54 | 0.45* |
Average | 0.84 | 0.94 | Average | 0.74 | 0.53 |
I did a similar test usin' t' Blobbo. Avast, me proud beauty! T' exact same folding technique, as used on t' Serval, was used for test #1 and #3. Well, blow me down! Begad! Blimey! I decided t' fold it differently for test #2. Blimey! On that test, me bucko, I folded t' parachutes and tightly wrapped t' shroud lines around each parachute. Also, arrr, it should be noted that on test #3, ya bilge rat, t' generic 12" parachute deployed but then got tangled for another half o' second and deployed again. Aye aye! Blimey! I had already stopped t' watch so I missed t' extra time.
My thoughts about t' tests above are that they are inconclusive. Yes, maybe the J&P opens faster and with less problems, however, it's within 10ths o' a second. Avast, me proud beauty! Blimey! Perhaps, J&P's larger parachutes will have a more noticeable openin' speed.
Watchin' 14 flights gave me a good feelin' about this parachute's performance. Whether it opened faster or not doesn't matter t' me. Arrr! Blimey! Overall, I would rate this parachute 4 1/2 points, only slightin' it on t' fact that it was presented as a 14" parachute, but measured as a 12". Aye aye!
T' 38" PARACHUTE:- by Jim Stuckman
CONSTRUCTION:
T' first thin' I noticed upon removing the 'chute from t' ziplock bag be t' quality o' materials and construction! T' 'chute consists o' 14 panels o' rip-stop nylon. Ya scallywag! The 'chute has a spill hole o' just over 6" diameter. Avast, ya bilge rat, me proud beauty! T' shroud lines on this parachute are much heavier than o' t' parachutes o' similar size supplied with many kits. T' lines are approximately 3/16"! They are securely stitched to t' canopy. I could find no flaws in material or workmanship.
FLIGHT/RECOVERY:
I flew t' 'chute in an ADR 4. 0 kit from Atlantic Rockets. Begad! T' motor be a G35-4 Econjet. Avast, me proud beauty! T' true test came when the delay ran long. Begad! Avast! T' rocket had gone well past apogee and was beginnin' to really gain speed when t' ejection charge fired. Well, blow me down! I was sure it would be a shred! T' me pleasant surprise, arrr, t' 'chute opened crisply for a perfect deployment! T' guys around me had two things t' say when t' 'chute deployed - "tough 'chute!" and "look at t' colors, matey, they really show up in the sky". Avast, me proud beauty! I agree with both statements. Aye aye! Well, ya bilge rat, blow me down!
After examinin' the 'chute and findin' it in perfect condition after t' high speed deployment I am convinced this is a very tough 'chute! T' multi-color design did seem t' show up very well against both blue sky and clouds. Avast!
CONCLUSION:
I'm impressed with t' quality, durability and value o' t' J&P parachute. Aye aye! It is going to be installed in me soon t' be completed North Coast Interceptor G instead of the stock parachute. Ahoy! This would make a great upgrade t' t' typical kit supplied parachute. Ahoy! Blimey! If you are lookin' for a quality parachute at a reasonable price I highly recommend you look at a J&P product. Overall, I would rate this parachute 5 points. Arrr! Avast!
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