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Thread: Field Guide to Shortwing Wingtip STC's

  1. #111
    HunterJ's Avatar
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    Default Re: Sullivan/Hendrick tip or Stewart Hanger21 Tip??

    Thanx for the pic Clayton
    Were your original cap strips taken off at the end of the web?
    Mine are still all the way to the bow - in that case would the extension plate only go to the end of the cap strip?.
    Again, many thanks for taking the time to take the pic.
    Cheers
    HunterJ

  2. #112
    Clayton Harper's Avatar
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    Default Re: Sullivan/Hendrick tip or Stewart Hanger21 Tip??

    The STC had you cut them off. Now that I look at it, I think the cap strips would not be long enough. I think you'll need to use the short pieces of spar. There has to be some bent spars down there.

  3. #113
    HunterJ's Avatar
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    Default Re: Sullivan/Hendrick tip or Stewart Hanger21 Tip??

    Hmmm sections of spar - good idea.
    Thanx for the info and suggestion.
    Cheers
    HunterJ

  4. #114
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    Default Sullivan or Stewart wing tips....which ones to get?

    Looking into wing tips and I am wondering which ones work the best for the short wing ? Is it true that Stewart doesn’t sell kits anymore? Is it true that you lose aileron authority with the wing tip extensions? Thanks in advance group!

  5. #115
    Stephen's Avatar
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    Default Re: Sullivan or Stewart wing tips....which ones to get?

    All wing tip extensions reduce aileron authority. Less lever arm. Sullivan tips has the greatest surface area increase therefore, it will lower stall and increase glide the most. Steward tips maintain the wing tip cure which is little value except appearance. There is more posted if you do a quick search. Good luck.
    "You can only tie the record for flying low."

  6. #116
    dhillier's Avatar
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    Default Re: Sullivan or Stewart wing tips....which ones to get?

    I have been in contact with Mr. Stewart by email - he does not sell kits any more. I did ask if he had any spare bit of kits left - he said he did have a few bits but was not forthcoming with selling them. I haven't been in contact with Mr. Sullivan yet as I haven't been to ANC from the UK recently - does anyone have information on cost of his STC and if a kit is still available?
    The Dakota tips that are sometimes referred to with his STC do not appear on the Dakota website anymore - I have tried to contact Dakota to ask if they still supply them, but to no avail.

    Regards

  7. #117
    smcnutt's Avatar
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    Default Re: Sullivan or Stewart wing tips....which ones to get?

    I've heard about loss of aileron authority in shortwings at slow speeds. We have the drooped tips on our plane and I have never noticed any reduced aileron authority. I suspect that the 'droop' helps keep the air under the wings where the ailerons can work. However I've not flown a shortwing without the droop tips for comparison and this is just my wild theory with nothing to back it up. Most people don't like the look of the droop tips but I'm fine with the look or without.

    Sent from my SM-T350 using ShortWingPipers.Org mobile app
    “Seek advice but use your own common sense.”
    ― Yiddish Proverb

  8. #118
    Stephen's Avatar
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    Default Re: Sullivan or Stewart wing tips....which ones to get?

    Quote Originally Posted by smcnutt View Post
    I've heard about loss of aileron authority in shortwings at slow speeds. We have the drooped tips on our plane and I have never noticed any reduced aileron authority. I suspect that the 'droop' helps keep the air under the wings where the ailerons can work. However I've not flown a shortwing without the droop tips for comparison and this is just my wild theory with nothing to back it up. Most people don't like the look of the droop tips but I'm fine with the look or without.

    Sent from my SM-T350 using ShortWingPipers.Org mobile app
    You have the Madras (Demmer) tip, it differs from other extended tips because it is not an extended wing. Dimmer shortened the wing by cutting off the cap strips then adding their tip. When I purchased by plane in the early 80's it also had Madras tips. It also has the old Ferguson STC. About 12 years ago I lengthened my wing using a spar splice then reinstalled the Madras tip, combining both STC's. Which is approved by the FAA. My plane flew much differently. Slower low end speeds, better glide and no cruise change. But, it did have a slower roll rate, mostly noticeable at low speeds when needed on gusty approaches.
    "You can only tie the record for flying low."

  9. #119
    Marc Davis's Avatar
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    Default Field guide to shortwing wingtip STC's

    I was researching the various wing tips found on shortwings and thought it might be useful to gather the info in one place.
    Please correct me if I got something wrong, add info about other tips if I missed some, or provide better pictures.

    Madras/Deamer
    Cut spar caps (shorter wing than most tips)
    Replace last rib with full size plywood or stamped rib.
    Install tip on last rib.
    Note distance between aileron and last rib


    Fergusson / Plane Booster
    Bend cap strips straight (adds wing length)
    Replace second to last rib with full size
    Replace last rib with plywood or stamped rib.
    Install tip on last rib.
    Note distance between aileron and last rib




    Crosswinds STOL
    Not very common
    Like a Sullivan with stall fence on top



    Sullivan / Hendricks
    Bend cap strips straight (adds wing length)
    Replace second to last rib with full size
    Replace last rib with stamped rib.
    Install tip on last rib.


    Stewarts
    Bend cap strips straight (adds wing length)
    Replace last rib with full size ribFabric over a bow like stock
    Install bow similar to stock
    Cover with fabric



    Svenn's Aviation / Dakota Cub
    STC to install Dakota tip.
    Last edited by Marc Davis; 06-23-2018 at 10:01 AM.

  10. #120
    andya's Avatar
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    Default Re: Field guide to shortwing wingtip STC's

    Mark, nice pics to show the differences, everyone has reason for a preference, I still like the looks of the original, will take what it gives in flying qualities and performance.
    nice work though
    "Progress is our most important problem"

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