DG-101 - increase performance/sealing/winglets(?)

Op vrijdag 12 juli 2019 15:13:28 UTC+2 schreef Nick Hill:
On 12/07/2019 10:44, Senna Van den Bosch wrote:

Thanks! I will be contacting DG and SCT Terlet (where I bring my glider for ARC) for advice. I have seen some DG-100 with different wingtips than mine, wingtips more like the LS-4, with a very slight curve and narrowing to the end of the tip, where my DG's wingtips have some sort of block (about 1 inch) with a metal skid. Maybe it would be possible to replace these?


The different wingtip profile is an official DG mod covered by DG100 TN
301-20. See the DG website for info.

https://www.dg-flugzeugbau.de/en/mai...echnical-notes

--

Nick Hill

That's the tip I was looking for!
Since I'm going to a different trailer instead of my current home-built 30+ year old, I could mount the wings in a different way in my trailer instead of securing it with a hole in the skid.
Thank you!

All good advice.
I only add a very important item IMHO: canopy sealing. Air leaking from the cockpit via the rear canopy gap can create a large "airbrake" always deployed, influencing the airflow over the fuselage and wingroots.

Re. flying conservatively, the IGC traces from current Club Class European Championships seem to show the contrary. They push their Cirri at about 80-90kts when 5kt climbs are expected. That's surprising but effective.

Cheers,
Aldo Cernezzi

When I bought my DG101 years ago (since sold) I wrote to DG asking if adding turbulators to the wings would help performance. The answer was a clear "no".

Op vrijdag 12 juli 2019 15:13:28 UTC+2 schreef Nick Hill:
On 12/07/2019 10:44, Senna Van den Bosch wrote:

Thanks! I will be contacting DG and SCT Terlet (where I bring my glider for ARC) for advice. I have seen some DG-100 with different wingtips than mine, wingtips more like the LS-4, with a very slight curve and narrowing to the end of the tip, where my DG's wingtips have some sort of block (about 1 inch) with a metal skid. Maybe it would be possible to replace these?


The different wingtip profile is an official DG mod covered by DG100 TN
301-20. See the DG website for info.

https://www.dg-flugzeugbau.de/en/mai...echnical-notes

--

Nick Hill

Do you also have any info on handling/performance differences using the new wingtips?

Op zaterdag 13 juli 2019 15:25:06 UTC+2 schreef John DeRosa OHM Ω http://aviation.derosaweb.net:
When I bought my DG101 years ago (since sold) I wrote to DG asking if adding turbulators to the wings would help performance. The answer was a clear "no".

That's some work done for me
I guess proper sealing and the new wingtips would be the best way to increase performance, will try some proper sealing first.

Senna
I'd go with the sealing and make sure the canopy is sealed too.
I would not pay for winglets for that ship.
If you need more go
Look for a ASW 20 or -27 or LS3 with a functioning ballast system
Enjoy your ship for what its worth today
And as Hank said don't try to fly too fast, do less climbing instead, that's some great advice right there.

Op zondag 14 juli 2019 19:03:17 UTC+2 schreef Nick Kennedy:
Senna
I'd go with the sealing and make sure the canopy is sealed too.
I would not pay for winglets for that ship.
If you need more go
Look for a ASW 20 or -27 or LS3 with a functioning ballast system
Enjoy your ship for what its worth today
And as Hank said don't try to fly too fast, do less climbing instead, that's some great advice right there.

Hmm good point.
My maximum speed I usually sustain is 120-130, I do higher if I'm under a street and too high. Higher than 150 feels like going straight down though. Climbs in Belgium average between 1 to 2 m/s with some good spots up to 3 m/s, so not pushing it too far.

Any idea what sealing for canopy works well? There's so much choice. This is where I usually order my gliding needs: http://glider-equipment.nl/catalog/i...alings-c-82_86

Something like THIS
https://www.lowes.com/pd/m-d-17-ft-x-3-8-in-white-window-seal-rubber-window-weatherstrip/1096091?cm_mmc=shp-_-c-_-prd-_-hdw-_-google-_-lia-_-145-_-weatherstripsoftgoods-_-1096091-_-0&kpid&store_code=1543&k_clickID=go_1737082938_719 71988350_338442687748_pla-444551884491_c_9030437&gclid=Cj0KCQjwpavpBRDQARIsA PfTwiyWEoY_gTt4gRH1wbmh1U7oNqRnk5OepfTVP6rh0DKwCw_ tVJWDGI8aAuLoEALw_wcB
works really well.Â* My friend and I sealed his ASW-27 with it and says
the difference was remarkable.Â* Surely you can find similar in Belgium.

On 7/14/2019 12:37 PM, Senna Van den Bosch wrote:
Op zondag 14 juli 2019 19:03:17 UTC+2 schreef Nick Kennedy:
Senna
I'd go with the sealing and make sure the canopy is sealed too.
I would not pay for winglets for that ship.
If you need more go
Look for a ASW 20 or -27 or LS3 with a functioning ballast system
Enjoy your ship for what its worth today
And as Hank said don't try to fly too fast, do less climbing instead, that's some great advice right there.
Hmm good point.
My maximum speed I usually sustain is 120-130, I do higher if I'm under a street and too high. Higher than 150 feels like going straight down though. Climbs in Belgium average between 1 to 2 m/s with some good spots up to 3 m/s, so not pushing it too far.

Any idea what sealing for canopy works well? There's so much choice. This is where I usually order my gliding needs: http://glider-equipment.nl/catalog/i...alings-c-82_86

--
Dan, 5J

Dan, did you apply that to the canopy side or the glider side?

Matt

On Monday, 15 July 2019 09:02:10 UTC+10, Matt McBee wrote:
Dan, did you apply that to the canopy side or the glider side?

Matt

Canopy side. Most canopies have a concave structure that sits over the lip on the cockpit side. Easier to run this stuff around the concave portion since it won't move then.