Re: Rolladen- Schneider LS3A flap seals- Do they really make any difference?

[[email protected]]

On Friday, July 6, 2001 11:52:12 PM UTC-4, clay thomas wrote:
> "November Bravo" > wrote in message >...
> > The are two LS3's at oour club, and aoriginal flaperon LS3 and an LS3A.
> > Both have the seals and both showed a significant performance increase.
> > Have never had a problem with the seals coming off or getting bent.
> > "dennis raphael" > wrote in message
> > om...
> > > The flap seals at the wing root consantlty seem to get bent up , fall
> > > off, and otherwise look lousy. How much good do they really do for a
> > > recreational soaring pilot??? Any differnce in flight charactoristics
> > > I will notice?. For those who dont know what I am talking about, the
> > > seals are a piece of flexible plastic that attach to the top and
> > > bottom of the flap next to the fusalage to seal a 3/8 in gap at the
> > > rear 5 inches of the wing root where the flap raises and lowers.
> > > thanks
> > >
>
> I made some new ones two years ago and have had no problem. I used
> clear mylar obtained at a drafting supply house. I attached with high
> quality double sided 3M tape. Let me know if you need the templates to
> cut new ones.If the thichness of the mylar is correct,they will never
> fold over in flight.

please send the templates. thanks pck at aigroupinc.com

[[email protected]]

I owned an original LS 3 for many years. Never had a problem with the seals in flight. But the wing root brackets in the factory Komet trailer would crease them unless they were taped together in a gentle curve before lowering the lid. I think I recall adjusting the brackets in the trailer to eliminate this problem. Dick Johnson's testing indicated there was some performance loss without the seals. I know of at least one owner who used auto body putty to build up a flat spot on each side of the fuselage so the butt end of the flaps could "wipe" against them (with a felt seal) and dispense with the flexible seals entirely. I watched them perform this minor modification in the hangar on a rain day at a contest back in...1979? :)

Chip Bearden
ASW 24 "JB"
U.S.A.

[KiloKilo[_2_]]

You were flying contests in 1979? You must be one of those legacy soaring pilots ...:-) kk

On Sunday, January 6, 2013 12:54:25 AM UTC-5, wrote:
> I owned an original LS 3 for many years. Never had a problem with the seals in flight. But the wing root brackets in the factory Komet trailer would crease them unless they were taped together in a gentle curve before lowering the lid. I think I recall adjusting the brackets in the trailer to eliminate this problem. Dick Johnson's testing indicated there was some performance loss without the seals. I know of at least one owner who used auto body putty to build up a flat spot on each side of the fuselage so the butt end of the flaps could "wipe" against them (with a felt seal) and dispense with the flexible seals entirely. I watched them perform this minor modification in the hangar on a rain day at a contest back in...1979? :)
>
>
>
> Chip Bearden
>
> ASW 24 "JB"
>
> U.S.A.

[[email protected]]

Hi,

it would be great if anybody could send me some information on how to build these seals (templates, dimension, material, etc).

Thanks,
--oliver



Am Sonntag, 6. Januar 2013 13:57:29 UTC+1 schrieb KiloKilo:
> You were flying contests in 1979? You must be one of those legacy soaring pilots ...:-) kk
>
>
>
> On Sunday, January 6, 2013 12:54:25 AM UTC-5, wrote:
>
> > I owned an original LS 3 for many years. Never had a problem with the seals in flight. But the wing root brackets in the factory Komet trailer would crease them unless they were taped together in a gentle curve before lowering the lid. I think I recall adjusting the brackets in the trailer to eliminate this problem. Dick Johnson's testing indicated there was some performance loss without the seals. I know of at least one owner who used auto body putty to build up a flat spot on each side of the fuselage so the butt end of the flaps could "wipe" against them (with a felt seal) and dispense with the flexible seals entirely. I watched them perform this minor modification in the hangar on a rain day at a contest back in...1979? :)
>
> >
>
> >
>
> >
>
> > Chip Bearden
>
> >
>
> > ASW 24 "JB"
>
> >
>
> > U.S.A.

[Sierra Whiskey]

I Just recently made some using this Template:
http://www.goddard.com/wipers/wiper1.pdf

They seem to be working great. I ordered some 0.040" thick Mylar which seems to work perfect. I selected a thicker material to see if it would be more robust than what I had before. The material before was quite thin and tore in a couple places. I have about 50 hours of flying on my new wipers and they appear to be holding up quite well. I may go back and re-cut them this winter just to make them about 1/4" wider, but we will see.

-SW

On Tuesday, June 17, 2014 12:43:37 AM UTC-7, wrote:
> Hi,
>
>
>
> it would be great if anybody could send me some information on how to build these seals (templates, dimension, material, etc).
>
>
>
> Thanks,
>
> --oliver
>
>
>
>
>
>
>
> Am Sonntag, 6. Januar 2013 13:57:29 UTC+1 schrieb KiloKilo:
>
> > You were flying contests in 1979? You must be one of those legacy soaring pilots ...:-) kk
>
> >
>
> >
>
> >
>
> > On Sunday, January 6, 2013 12:54:25 AM UTC-5, wrote:
>
> >
>
> > > I owned an original LS 3 for many years. Never had a problem with the seals in flight. But the wing root brackets in the factory Komet trailer would crease them unless they were taped together in a gentle curve before lowering the lid. I think I recall adjusting the brackets in the trailer to eliminate this problem. Dick Johnson's testing indicated there was some performance loss without the seals. I know of at least one owner who used auto body putty to build up a flat spot on each side of the fuselage so the butt end of the flaps could "wipe" against them (with a felt seal) and dispense with the flexible seals entirely. I watched them perform this minor modification in the hangar on a rain day at a contest back in...1979? :)
>
> >
>
> > >
>
> >
>
> > >
>
> >
>
> > >
>
> >
>
> > > Chip Bearden
>
> >
>
> > >
>
> >
>
> > > ASW 24 "JB"
>
> >
>
> > >
>
> >
>
> > > U.S.A.

[[email protected]]

On Friday, July 25, 2014 1:04:22 PM UTC-4, Sierra Whiskey wrote:
> I Just recently made some using this Template:
>
> http://www.goddard.com/wipers/wiper1.pdf
>

Here is the url for the templates along with revisions I made to the above design and pix of them installed.

Regards,

Zero One (Larry Goddard)

[[email protected]]

On Saturday, July 26, 2014 9:54:35 AM UTC-4, wrote:
> On Friday, July 25, 2014 1:04:22 PM UTC-4, Sierra Whiskey wrote:
>
> > I Just recently made some using this Template:
>
> >
>
> > http://www.goddard.com/wipers/wiper1.pdf
>
> >
>
> Here is the url for the templates along with revisions I made to the above design and pix of them installed.
>
>
>
> Regards,
>
>
>
> Zero One (Larry Goddard)


Oops...
Here's the URL === http://www.goddard.com/wipers/

[bill palmer]

On Friday, July 25, 2014 at 10:04:22 AM UTC-7, Sierra Whiskey wrote:
> I Just recently made some using this Template:
> http://www.goddard.com/wipers/wiper1.pdf
>
> They seem to be working great. I ordered some 0.040" thick Mylar which seems to work perfect. I selected a thicker material to see if it would be more robust than what I had before. The material before was quite thin and tore in a couple places. I have about 50 hours of flying on my new wipers and they appear to be holding up quite well. I may go back and re-cut them this winter just to make them about 1/4" wider, but we will see.
>
> -SW
>
> On Tuesday, June 17, 2014 12:43:37 AM UTC-7, wrote:
> > Hi,
> >
> >
> >
> > it would be great if anybody could send me some information on how to build these seals (templates, dimension, material, etc).
> >
> >
> >
> > Thanks,
> >
> > --oliver
> >
> >
> >
> >
> >
> >
> >
> > Am Sonntag, 6. Januar 2013 13:57:29 UTC+1 schrieb KiloKilo:
> >
> > > You were flying contests in 1979? You must be one of those legacy soaring pilots ...:-) kk
> >
> > >
> >
> > >
> >
> > >
> >
> > > On Sunday, January 6, 2013 12:54:25 AM UTC-5, wrote:
> >
> > >
> >
> > > > I owned an original LS 3 for many years. Never had a problem with the seals in flight. But the wing root brackets in the factory Komet trailer would crease them unless they were taped together in a gentle curve before lowering the lid. I think I recall adjusting the brackets in the trailer to eliminate this problem. Dick Johnson's testing indicated there was some performance loss without the seals. I know of at least one owner who used auto body putty to build up a flat spot on each side of the fuselage so the butt end of the flaps could "wipe" against them (with a felt seal) and dispense with the flexible seals entirely. I watched them perform this minor modification in the hangar on a rain day at a contest back in...1979? :)
> >
> > >
> >
> > > >
> >
> > >
> >
> > > >
> >
> > >
> >
> > > >
> >
> > >
> >
> > > > Chip Bearden
> >
> > >
> >
> > > >
> >
> > >
> >
> > > > ASW 24 "JB"
> >
> > >
> >
> > > >
> >
> > >
> >
> > > > U.S.A.
RE "I ordered some 0.040" thick Mylar"

DO you mean 0.004" thick (extra zero in there)
Clear Polysester Film

McMaster part # 8567K42
https://www.mcmaster.com/#polyester-(pet)/=1bmm306


My LS3 seals are getting a bit ratty looking too.

Thanks wfpalmer at gmail

[Charlie M. (UH & 002 owner/pilot)]

I would really think it is supposed to be 0.040" thick, that's like a couple sheet of paper, your number is very thin.

[Dan Marotta]

Think of the spark gap in an automotive spark plug.Â* That's normally
around .028" to .032".Â* Some electronic ignitions call for a larger
gap.Â* Borrow a set of feeler gauges or a caliper and see what .040"
looks like.

On 2/18/2018 6:26 PM, Charlie M. (UH & 002 owner/pilot) wrote:
> I would really think it is supposed to be 0.040" thick, that's like a couple sheet of paper, your number is very thin.

--
Dan, 5J