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Thread: PA-16 O-235 to O-320 conversion

  1. #31
    Clayton Harper's Avatar
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    Default Re: O320 stc for clipper?

    Brettgarrity,
    It is a good STC, because it has the right fuel tank, and an oil cooler included.

  2. #32

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    Default Re: O320 stc for clipper?

    If you get the cd for N5855H there is reference to an STC

    for the O-320.

    Horton Hutchinson?

    I'm unsure what was done per which STC but it had:

    Rt tank

    PA-22 systems & cowling forward of the firewall,

    No fuselage tank.

    "Raised" instrument Panel

    No Gross Weight or Airspeed Limit changes as I recall.
    Last edited by P.o.P.; 04-04-2013 at 10:37 AM.

  3. #33
    Clayton Harper's Avatar
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    Default Re: O320 stc for clipper?

    P.o.P,

    I think Steve P. know about that STC. Ask him. I bought the Stewart O-320.

  4. #34
    Gilbert Pierce's Avatar
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    Default Re: O320 stc for clipper?

    All of the older PA-16 O-320 installations were done on a field approval using one time STC's as acceptable data and then getting a field approval.
    In addition to the Dan Stewart there is another STC for the O-320.

    SA00283BO

    This certificate issued to:
    Abbott Cedric M

    STC Holder's Address:
    Gesner Road
    Buckfield ME 04220
    United States

    Description of the Type Design Change:
    Installation of Lycoming O-320-A, -A1B, -A2A, -A2B, -A2C, -C1A, -C1B, -C2A or C2B engine and Sensenich 74DM6 propeller

    Application Date:
    02/27/2009
    Status:
    Issued, 02/27/2009
    Responsible Office:
    Boston Aircraft Certification Office (ANE-150), Tel: (781) 238-7151
    TC Number -- Make -- Model:
    1A1 -- Piper Aircraft, Inc. -- PA-16

    Here is the Dan Stewart STC:
    STC Number:
    SA01843SE

    This certificate issued to:
    Dan Stewart

    STC Holder's Address:
    405 Norman Ave.
    Cashmere WA 98815
    United States

    Description of the Type Design Change:
    Installation of Lycoming engine and modified fuel system

    Application Date:
    09/21/2006

    Status:
    Amended, 03/10/2009

    Responsible Office:
    Seattle Aircraft Certification Office (ANM-100S), Tel: (425) 917-6400

    TC Number -- Make -- Model:
    1A1 -- Piper Aircraft, Inc. -- PA-16
    Last edited by Gilbert Pierce; 04-04-2013 at 11:46 AM.

  5. #35
    Ha622's Avatar
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    Default PA-16 engine upgrade (once again?)

    Hello,

    I am toying with the idea of changing the original O-235 on my Clipper to an O-320. I have searched the forum and the internet and found quite a bit of information. I understand that the only STC available is from Stewart. I have not yet tried to get in touch with them. How can the Stewarts be contacted? Same address as the covering business? Hasn't this part been sold?

    I suppose that an upgrade is not just an engine swap. What else needs to be done?
    - My Clipper already has the right hand wing tank (STC SA 151150). Therefore I hope to be OK there.
    - can the cowling be reused?
    - I assume that new baffling will have to be made
    - New prop? Which one?
    - New exhaust system? Which one?
    - I believe that the engine mount does not need any modifications, right?
    - What type of engines are allowed under the STC? Will probably have to talk to the Stewarts about that...
    - any other modifications necessary?

    The current original engine, exhaust and prop seem to be getting tired and are probably heading for an overhaul before not too long. I often fly alone and don't really have reasons to complain about the performance with the O-235. Only on some rare occasions, I would appreciate a little bit of additional climb capability when heavy or at high altitudes (Switzerland).
    I have the impression that a more common O-320 may be less costly to maintain (price of spare parts). Since I do not fly a whole lot, a good used O-320 with some remaining potential may give me good service for many more years and may be a better investment than overhauling the O-235.

    Any thoughts?

    Juerg
    N5723H

  6. #36
    Administrator Steve Pierce's Avatar
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    Default Re: PA-16 engine upgrade (once again?)

    I just talked to Marjie Stewart to get the contact information for the 150 hp Clipper STC since they sold the fabric business. they have a website with all the details and you can order directly off of it. https://www.stewartshangar21.com/pro.../stc-sa01843se

    Here is their webite address for Stewart Wingtips, Bungee Buddy etc. https://www.stewartshangar21.com/

    I merged your thread with a couple more on the same subject so you might go back and read the previous posts. Good information as well as Stewarts site which lists the acceptable engine models.

  7. #37
    Administrator Steve Pierce's Avatar
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    Default Re: PA-16 O-235 to O-320 conversion

    Here is a link to Airforms for the new baffles used in the STC. https://www.airforms.biz/?route=prod...product_id=242

  8. #38

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    Default Re: PA-16 O-235 to O-320 conversion

    There is an STC that allows an O-235-C2C to use K2C cylinders. I don't see any reason that you can't get a DER approval to use that STC on the O-235-C1. It would require re-machining the case to change all the cylinder studs. The advantage is higher compression, newer designed cylinders and pistons, about $600 less cost per cylinder, better fuel economy. Not sure what the overall cost difference would be, but the STC is $500. STC
    SE00988CH Precision Engines Owensboro KY
    . I talked to the guy last week, he didn't sound like he wanted to add the C1 and C1B engines to the STC, but looking through the parts catelog, a deviation to the STC is pretty easy.

  9. #39
    Ha622's Avatar
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    Default Re: PA-16 O-235 to O-320 conversion

    I am having my O235C1 overhauled by Ly-Con. They just informed me that Lycoming is out of stock of new cylinders. They are not able to say when they would be available again. The proposed alternative is to use overhauled cylinders.

    Juerg

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