If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Newest Sailplane in the world on display at the 2016 SSA convention
Yep, its the new Ventus. Sorry Boggs, I promise I'll shut up next week, and I will never again try to host a national event with a marketing budget of $0.00. This goes on the list along with: never try to run a manufacturing operation if the cost accountant works for someone else. That one didn't end well.
Would you believe that glider pilots will just not buy advance tickets? Makes it real hard to get comfortable with the number of attendees. Bought a bottle of Stranahan Colorado Whiskey Saturday, it might not make it to the convention start. May be going to Rehab week after next. SF |
#2
|
|||
|
|||
Newest Sailplane in the world on display at the 2016 SSA convention
Interesting that the New Ventus has three distinct hard bends in the wing when viewed from photos underneath the wing. I wonder what the purpose of those are? Damn auto correct on prior post.
|
#3
|
|||
|
|||
Newest Sailplane in the world on display at the 2016 SSA convention
Who cares? God it's beautiful! An astonishingly gorgeous aircraft. I just hope it doesn't destroy the resale value of my 29
|
#4
|
|||
|
|||
Newest Sailplane in the world on display at the 2016 SSA convention
I care that is why I commented. usually the air likes smooth transitions. If you view the photos on FB there are hard bends in the wing. I wonder what the purpose is, why they are not smooth transitions and is there any separation on the hard edges of the bends?
As for the 29, over 300 have been built for a reason, it is a wonderful glider. The new Ventus has a 3 plus year wait and it has not been vetted. I am sure it is a great glider, but only time will tell if it is better than the current standard. On Monday, February 8, 2016 at 8:13:36 PM UTC-8, Andrew Ainslie wrote: Who cares? God it's beautiful! An astonishingly gorgeous aircraft. I just hope it doesn't destroy the resale value of my 29 |
#5
|
|||
|
|||
Newest Sailplane in the world on display at the 2016 SSA convention
Wow, looking forward to seeing it!
|
#6
|
|||
|
|||
Newest Sailplane in the world on display at the 2016 SSA convention
It looks very similar to the Arcus which has worked out well, seems to have proved the concept.
Re the 29, isn't the JS1C the glider it will be trying to beat? |
#7
|
|||
|
|||
Newest Sailplane in the world on display at the 2016 SSA convention
Increasing dihedral towards the tip.
Seems to have worked well for the D2, DD & Arcus Won't significantly affect the resale of a '29. You'll need to wait for the ASx33 for that PF At 05:36 09 February 2016, Jonathan St. Cloud wrote: I care that is why I commented. usually the air likes smooth transitions. = If you view the photos on FB there are hard bends in the wing. I wonder w= hat the purpose is, why they are not smooth transitions and is there any se= paration on the hard edges of the bends? As for the 29, over 300 have been built for a reason, it is a wonderful gli= der. The new Ventus has a 3 plus year wait and it has not been vetted. I = am sure it is a great glider, but only time will tell if it is better than = the current standard. On Monday, February 8, 2016 at 8:13:36 PM UTC-8, Andrew Ainslie wrote: Who cares? God it's beautiful! An astonishingly gorgeous aircraft. I just= hope it doesn't destroy the resale value of my 29 |
#8
|
|||
|
|||
Newest Sailplane in the world on display at the 2016 SSAconvention
On Mon, 08 Feb 2016 21:36:04 -0800, Jonathan St. Cloud wrote:
I care that is why I commented. usually the air likes smooth transitions. If you view the photos on FB there are hard bends in the wing. I wonder what the purpose is, why they are not smooth transitions and is there any separation on the hard edges of the bends? You get interference drag at any dihedral break, but the amount of drag is not linearly related to the angle between the panels. Consequently, all other things being equal, a six panel wing will have less drag than a four panel wing with the same span and tip height because the angles between the panels are less. At least, that is what I've heard from wing designers who know a lot more about such matters than than I do. My design experience is limited to free flight F1J power models and F1A gliders. I've usually designed and built my own models and got decent competition results with them. -- martin@ | Martin Gregorie gregorie. | Essex, UK org | |
#9
|
|||
|
|||
Newest Sailplane in the world on display at the 2016 SSA convention
Couple of reasons for the "hard bends".
1. Manufacturing. Yes, you could do it as smooth, flowing curves since the molds are now machine cut. But, it is more difficult to fit and press together long, flowing curved joints than a series of straight line joints. You also notice that most wings have distinct taper breaks, and not the "elliptical" planform (SZD-55, PW-5 and PW-6 are exceptions). 2. Ease of repair or refinish. Ever try to make a sanding board to perfectly blend a re-pair or refinish on a continuously varying radius, 3D part? The changes in dihedral are small enough to not cause any significant issues. Similar to the changes in taper ratio at a taper break. Yes, there is a change in the pressure field around the wing at each of these, but there is negligible impact until you get to much larger changes in taper ratio or dihedral than are used here. To my mind, the real benefits of the changes in dihedral come about in the outer at most 1/3rd of the semi-span, where you can make the downwash field behind the wing work to keep the tip votrex from shrinking the span of the downwash field. But, that is just my opinion. Steve Leonard |
#10
|
|||
|
|||
Newest Sailplane in the world on display at the 2016 SSA convention
I always thought the discrete breaks in dihedral and taper were primarily so the control surfaces could have straight hinge lines that didn't bind.
I suspect the other reasons are also true. 9B |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Newest Sailplane in the world on display at the 2016 SSA convention | Renny[_2_] | Soaring | 4 | February 8th 16 10:35 PM |
Used Sailplanes for sale & On Display at the 2016 SSA Convention | SF | Soaring | 7 | February 7th 16 04:51 PM |
What to do at the 2016 SSA convention, besides the conventon | SF | Soaring | 3 | February 7th 16 04:24 PM |
2016 SSA Convention Presentations | Jonathan St. Cloud | Soaring | 10 | February 5th 16 07:55 PM |
2016 SSA Convention Website is up | [email protected] | Soaring | 3 | September 14th 15 06:35 PM |