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
|
|||
|
|||
Ventus b flap sealing
Hello fellow first gen Ventus owners. I'm removing and replacing the seals on the lower wing surface of my Ventus b. The previous installation had tape (perhaps teflon) from the wing to the flaps, but no mylar seal. The ailerons currently have both tape and mylar kombi seals. I'm using Streifeneder's drawing to as a guide to install the new seals. What installations are other Ventus a and b owners using on the flap gap? If installing mylar on the flaps are there any problems when deploying full spoiler and the resultant large flap angle pinching or bending the mylar?
I've seen photos online, as well as Schempp-Hirth Ventus C/Nimbus 3 drawings, of a two layer seal with aft and forward facing mylars. The rolling S seal seems like a good idea, but too involved to get done. Thanks for sharing your setup. |
#2
|
|||
|
|||
Ventus b flap sealing
On Tuesday, March 30, 2021 at 9:13:01 AM UTC-6, wrote:
Hello fellow first gen Ventus owners. I'm removing and replacing the seals on the lower wing surface of my Ventus b. The previous installation had tape (perhaps teflon) from the wing to the flaps, but no mylar seal. The ailerons currently have both tape and mylar kombi seals. I'm using Streifeneder's drawing to as a guide to install the new seals. What installations are other Ventus a and b owners using on the flap gap? If installing mylar on the flaps are there any problems when deploying full spoiler and the resultant large flap angle pinching or bending the mylar? I've seen photos online, as well as Schempp-Hirth Ventus C/Nimbus 3 drawings, of a two layer seal with aft and forward facing mylars. The rolling S seal seems like a good idea, but too involved to get done. Thanks for sharing your setup. IIRC, Dick Johnson recommended using both the mylar and the internal S seals. That said, I found the mylars in place of the s-seals were fine and improvement. Kestrel 19, not Ventus. |
#3
|
|||
|
|||
Ventus b flap sealing
Thanks for the reply Frank.
The configuration I'm removing was a tape of some sort on the flap to wing gap with conventional tape and mylar on the ailerons. All of this is bottom surface only. My concern is with the wing to flap angle and whether the mylar would get pinched or bent. Dick Johnson did report "Excellent factory-installed air seals were evident along the elevator, aileron, and flap hinge lines and at the flap/fuselage juncture," in his December 1981 review of the Ventus a in Soaring magazine. I'm not sure whether mylar was over the seal or not. The seals and mylar I'm removing are the GFS system from Streifeneder and have been on a long time. |
#4
|
|||
|
|||
Ventus b flap sealing
On Tuesday, March 30, 2021 at 3:18:06 p.m. UTC-6, wrote:
Thanks for the reply Frank. The configuration I'm removing was a tape of some sort on the flap to wing gap with conventional tape and mylar on the ailerons. All of this is bottom surface only. My concern is with the wing to flap angle and whether the mylar would get pinched or bent. Dick Johnson did report "Excellent factory-installed air seals were evident along the elevator, aileron, and flap hinge lines and at the flap/fuselage juncture," in his December 1981 review of the Ventus a in Soaring magazine. I'm not sure whether mylar was over the seal or not. The seals and mylar I'm removing are the GFS system from Streifeneder and have been on a long time. I have mylar top and bottom on mine. The mylar hasn't come off yet from the brake's movement. I don't have the internal fabric tape that the factory installed. I believe a previous owner removed it when they removed the flaps and ailerons for refinish. Chris |
#5
|
|||
|
|||
Ventus b flap sealing
On Tuesday, March 30, 2021 at 8:58:12 PM UTC-5, wrote:
On Tuesday, March 30, 2021 at 3:18:06 p.m. UTC-6, wrote: Thanks for the reply Frank. The configuration I'm removing was a tape of some sort on the flap to wing gap with conventional tape and mylar on the ailerons. All of this is bottom surface only. My concern is with the wing to flap angle and whether the mylar would get pinched or bent. Dick Johnson did report "Excellent factory-installed air seals were evident along the elevator, aileron, and flap hinge lines and at the flap/fuselage juncture," in his December 1981 review of the Ventus a in Soaring magazine. I'm not sure whether mylar was over the seal or not. The seals and mylar I'm removing are the GFS system from Streifeneder and have been on a long time. I have mylar top and bottom on mine. The mylar hasn't come off yet from the brake's movement. I don't have the internal fabric tape that the factory installed. I believe a previous owner removed it when they removed the flaps and ailerons for refinish. Chris Thanks Chris. No internal rolling S seals on my Ventus either. I mocked up a small section of the seal and mylar on the flap and it looked like it will work ok. I don't think my Ventus b (SN 37) has ever had any sealing on the upper surfaces. |
#6
|
|||
|
|||
Ventus b flap sealing
Mylars do not seal the gap, to create airtight barrier you need that s-tape.
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
S-H Ventus light-bar flap position indicator | [email protected] | Soaring | 16 | March 24th 16 11:41 PM |
Ventus C (1986) - Flap and Gear Indicator | Ken Kochanski (KK) | Soaring | 3 | January 19th 10 01:33 PM |
Sealing The PIK-20B Canopy | P. Corbett | Soaring | 5 | August 21st 05 08:32 PM |
Sealing a Schweizer; 1-35 mainly | TOM RENT | Soaring | 0 | April 11th 04 08:46 PM |
Libelle Gap Sealing | Owain Walters | Soaring | 4 | April 11th 04 07:13 PM |