Quick JS3 walk around with the Jonker Sailplane boys…

[@markplain2555]

Hard to imagine I used to fly with the Jonker brothers in Magaliesburg and today they have a well established glider of their own. The brothers used to switch radio channel and talk consistently between them while flying. While changing our radio channel we would sometimes come across their channel and listen in. We used to call it Radio Potch (they were from Potchefstroom). The intriguing part about their conversation was the details they would discuss and it was an incredible learning lesson on what a glider pilot goes through, from issues such as the comfort of the glider through the responsiveness of the glider in certain circumstances to actual thermalling. They even had their own code for various issues (which we could quickly decipher). Little did I realise they were systematically analysing every tiny detail of the glider and flight. I stand to be corrected but I believe they built their first glider as a university project which had all of us saying, "Whaaat?" The experienced pilots would say, yeah they just wasting their time, good gliders can only be built with government assistance in a huge market like Europe. Well guess what, these guys were determined, extremely creative and highly disciplined in detail.

[@ozoneswiftak]

Still got some hook ups in Alaska? Joking. You sound like a veteran as n the re as l deal.

[@schnitzel2425]

Even in open class, these JS3 gliders are insane, especially with the weather this year in Germany. Probably not as much compared to the newer open class gliders, but the older ones... Nimbus 4 & ASW22 were in trouble with the weather we have had. Very impressive.

[@florentinmuller2109]

One of my most favourite planes !!! Love it

[@robertfidler957]

Wow, I am impressed.

[@antanasvienuolis2897]

Thank You very much for sharing. I use this video ant photos for my scale JS3 model.

[@gxlbiscuit]

Thanks for the vid!

[@christophernolan8761]

Are u going to order one? And what do you think of the aux. engine options for a sailplane used competitively?

[@SteamDougy]

a wind screen on the microphone would have been nice!

[@SailFlyTri]

Sorry Douglas. Agreed. Impromptu iPhone video. My apologies for the annoyance.

[@welshpete12]

Is there any information on the glide angle yet ?

[@SailFlyTri]

welshpete12 - officially no, but unofficially, I'm sure the 15m version is > 50:1 at best glide and the 18m is probably nearly 55:1 at best glide. But the most important measurements are how "flat"'the polar performer curve (glide ratios at all speeds and wingloading) is at higher speeds and especially the performance at maximum wing-loading (handling, climb, etc.)

[@welshpete12]

Ok , thank you for the info

[@cjl76]

Why the flash of teeth over the 18m question?

[@tillthiemann6448]

cjl76 there is probably an 18m version comming

[@cloudstreets1396]

What is the design advantage for the large wing fairing?

[@SailFlyTri]

The aerodynamicists and designers of all sailplanes spend an enormous amount of time trying to get the overall airflow on all the gliders surfaces as laminar (non-turbulent) as possible, especially in this area of the glider as the wing/fuse junction is a well-known source of drag. This is why so many older sailplane designs have experimented with auxiliary wing fairings. So this new glider design, the JS-3, has a rarely used sailplane wing position known as a high wing (or having the wing joining the fuselage at the very top of the fuselage). This wing position has certain advantages (mainly, instead of 4 "high drag" corners with the fuselage and wing there are only 2 as the top surface of the wing blends into the fuselage). Unfortunately, this wing position has been unsuccessful in several older glider designs. Jonkers (JS-3 designer) has studied this aerodynamic problem now for roughly 2-3 years while using super-computer driven CFD analysis to iterate thru thousands of variables. They claim to have found a significant performance advantage after struggling for a long time to understand the high wing problem and make it pay off aerodynamically. Previously, the complicated math required to understand the airflow in this area was just too time-consuming, and the computer tools were not mature enough to be successful. So this glider does not have secondary fairings, but it has an ultra modern design that has taken years to perfect.

[@cloudstreets1396]

Are there any special considerations when choosing a trailer for the JS-3?

[@SailFlyTri]

CloudStreets Not to my knowledge. I have a high degree of confidence that the JS3, like the JS1 and most other modern gliders, fits in a standard 15m size trailer with both 15m and 18m wingtips within. The JS3's nemesis, the Diana 2, requires a very wide trailer as the inner 4 feet of the spar (each side) is permanently affixed to the fuselage, creating an 8 foot wide fuselage, and an issue for trailer configuration.

[@lautoka63]

Yes, increased computing power means that you can solve the Navier-Stokes equations, which I was told in Engineering school were insoluble. Lovely looking glider; I just need to win the lottery.

[@RBAERO]

beautiful glider

[@JeromeBache]

lovely balde to ride in the sky

[@boblloyd6145]

Pub landlord

[@grasshoppersystem]

Is the landing gear door a single one? In other pictures and videos appears to be two doors.

[@SailFlyTri]

Emir Sherbi correct. 2 doors. I thought one but was mistaken. Thanks for correction.

[@grasshoppersystem]

I was not trying correcting you. Your video was the first detailed view that i saw from the JS3, and i realy realy liked the concept of only one door. So much that i want to design one for my own. But when i didnt find any other picture about that i had to ask you. Thanks Sean!

[@natedog56789]

Anyone got an idea of price?

[@ozoneswiftak]

Bring down the cost and shrink the wing size. So in two trips a guy can hike it up a mountain. Seriously in Alaska we fly some great thermals

[@Simon-ue4wf]

the best reason for making much money

[@MardkoMBR]

Beautiful bird, could be better than 55:1 (18m)

[@gliderpilot8882]

ASG-29 Killer?

[@tomagge]

i want it...

[@kamuelalee]

Next time, wind screen on mic!

[@andrewnorgrove6487]

if your going to film and upload please remember the poor viewer or x-viewer in this case When it comes to wind noise ! The fix is a small piece of foam placed over the mic !! typical arrogance from the owner regarding questions and comments He should remember We are his company Offend us we go elsewhere ..

[@SailFlyTri]

SUNGEAR59 A simple iPhone is all I can afford...

[@SailFlyTri]

SUNGEAR59 Hey there. I am not a member of the company. I was just getting a quick tour after a competition flight. I used my mobile phone to record. It wasn’t meant to be a professional video. That said, yes, the wind noise stinks.

[@ozoneswiftak]

Beautiful wing. Should be about 22, 000$ total. Not two hundred. These guys are rich ducks flying. Try a paraglider, maybe learn on a sm as ll tr as trainer hill first. Not being a tug plane.

[@tztz1949]

Why does the factory have comments turned off? Maybe because they have turbine engines delivered that don’t run properly. Please JS fix your engines and stop ripping off your clients. Then you can turn your comments back on. What the hell is wrong with you?

[@SailFlyTri]

Bill, I'm just a pilot, not associated with the factory manufacturer. I am a fan of the JS gliders in general. Their design and relative performance is extremely impressive. That said, I fully agree that the reliability of the turbine is less than perfect. Same is true of all glider powerplants. To what extent is debatable. Hence I do not yet own a motor or sustained glider yet. I'm still waiting to see how the AS33 performs this summer in competition. For now my pure ASG29 tics all the boxes. The Euro/Dollar exchange rate is very poor now 😔 and is going to get much worse under the fraudulently elected (Quid Pro Quo, China's bought sock 🧦 puppet, Hunter Cocaine is a helluva drug 💉) Biden Crime Family (print, print, print dat debt 📈 💵, raise dem taxes)!