JS3 chatter

Thanks to J.Nieuwenhuize for posting this link Jonker's aerodynamicist Johan Bosman pictures of the JS3. http://www.imgrum.net/user/johanjbosman/697025039

As suggested, the Akaflieg München Mü31 article is also a good read. http://www.akaflieg.vo.tum.de/index.php/en/mue-31-en

Go around-come around...interesting how we're back to the AS Ka-6E shoulder wing. Can't wait to inspect how they did the automatic hook-ups. Really like the retractable tail wheel too. Congratulations Johan Bosman.

We'll see...pretty is as pretty does.

On 12/11/2016 5:11 PM, wrote:
...Really like the retractable tail wheel too...



Yup, just like the Slingsby Vega.
--
Dan, 5J

Photos on https://www.facebook.com/jonkersailplanes/ ;-D

At 08:01 12 December 2016, Iain Baker wrote:
Photos on https://www.facebook.com/jonkersailplanes/ ;-D


https://www.facebook.com/MDFlugzeugb...c_ref=NEWSFEED

https://www.facebook.com/MDFlugzeugb...tos/a.40017591
3328638.101822.232132770132954/1393824190630467/?type=3

https://scontent-lht6-1.xx.fbcdn.net/v/t1.0-
9/15390719_1393808377298715_9048016110461718121_n.jp g?
oh=3cb6f3ce5adf1b531eca4629f1292730&oe=58F2322B

Looks nice, congrats for the new bird! According to fb rumours it is not going to make Australia WGC, if that is true, too bad.

On Monday, December 12, 2016 at 6:15:26 AM UTC-5, krasw wrote:
Looks nice, congrats for the new bird! According to fb rumours it is not going to make Australia WGC, if that is true, too bad.

Because?

On Sunday, December 11, 2016 at 7:11:36 PM UTC-5, wrote:
Thanks to J.Nieuwenhuize for posting this link Jonker's aerodynamicist Johan Bosman pictures of the JS3. http://www.imgrum.net/user/johanjbosman/697025039

As suggested, the Akaflieg München Mü31 article is also a good read. http://www.akaflieg.vo.tum.de/index.php/en/mue-31-en

Go around-come around...interesting how we're back to the AS Ka-6E shoulder wing. Can't wait to inspect how they did the automatic hook-ups. Really like the retractable tail wheel too. Congratulations Johan Bosman.

We'll see...pretty is as pretty does.

the probes look stupid, i hate asymmetry. the rest of it looks really good though! will be very interesting to put the V3, 29, and JS3 in the same room.

Ah, should have put the news in a fresh thread.

Anyhow, congrats to Jonkers.

I'm surprised that they haven't gone for a center-wing with two light short tips. The high wing is a natural for using a one-piece center wing. By eliminating the most complex structural and control joint, there could be a significant reduction in build time, cost and weight. Putting it together should also be easier.

I hope their considerations to go conventional (as opposed to for example the Mü31) will one day be discussed.

For those interested in the aero background, a thread I started a few years ago discussed the aero of higher positioned wings in a bit more detail: http://www.homebuiltairplanes.com/fo...ad.php?t=15371

New panel and cockpit pictures posted on Facebook.

Hooray! The mechanical altimeter and compass are missing on the new panel. Hopefully the JS3 minimum equipment list will allow GPS to replace these steam gauges.

The instrument below the LXNAV 9070 flight computer is in a LXNAV case. Guessing this is a water ballast or battery management system.

The two switches mounted above the jet management system are marked master something. Guessing this is power on/off.

Perhaps the switches on to left side of the seat pan are bug wipers.

New canopy releases (very sexy) hopefully will reduce glare.

Very tidy panel. A++

On Tuesday, December 13, 2016 at 8:00:40 AM UTC-8, wrote:
New panel and cockpit pictures posted on Facebook.


Some things I notice:

Eyeball vent on the side of the cockpit is gone. We are back to the little flip out vent in the sliding window?

The cockpit extraction vent on the fuselage behind the pilot’s head is gone. In one of the photos there is something on the bottom of the fuselage just in front of the gear doors – has the vent been relocated there?

Due to the nose up attitude, on the takeoff roll it will be hard to see the towplane, and after landing it will be hard to see the runway. True, those are only a few seconds on each flight, but those are important seconds.

Maybe it is an optical illusion, but the canopy appears “squished� – from the side, the curve of the canopy appears flatter than the contour of the fuselage. Less headroom.

Wing shape appears almost identical to the one on the 18 meter version. It fact, without knowing better, I would think that this is just the 18m wing on a new fuselage.

Tail appears substantially higher than on the JS1B -- more like the tail on the JS1A. This might improve handling, but wouldn't it increase drag?