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  • N3787T
    started a topic F-19 exhaust system

    F-19 exhaust system

    I need an F-19 exhaust system. Does anyone have one, or know of one that's available, in any condition?

  • barnstmr
    replied
    Re: F-19 exhaust system

    F19 is certified to CAR 3. Check TCDS 1A9. Different from B-series. Be careful out there guys.

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  • astjp2
    replied
    Re: F-19 exhaust system

    Whoops, my bad, I was thinking of another airplane...Tim

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  • Garry Crookham
    replied
    Re: F-19 exhaust system

    Originally posted by astjp2 View Post
    Actually your t-craft is certified under car4a, not 3. Similar rules but not exactly the same. Tim
    Actually it's certified under Part 04 of the Civil Air Regulations effective as amended to May 1, 1938," not CAR04A.
    Last edited by Garry Crookham; 04-22-2014, 12:52. Reason: sp

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  • astjp2
    replied
    Re: F-19 exhaust system

    Actually your t-craft is certified under car4a, not 3. Similar rules but not exactly the same. Tim

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  • N3787T
    replied
    Re: F-19 exhaust system

    Thanks for the replies, everyone! I've been talking to the Anchorage FSDO, and we're waiting to see what engineering and flight test data they'll need. We don't presently have a DER in the Anchorage area. My FSDO contact says expect one or two months to process once the submission is complete. TCrafts are certified under CAR 3, which has fairly simple, mostly common sense requirements for induction and exhaust, like no CO in the cockpit, and specifies carb heat will provide a minimum 90 F temperature rise at 75% power and 30 F ambient temperature. I don't know yet if I'll need to install a carb air probe to prove the system. I've done a ground run and observed a 50 rpm drop with carb heat applied, so I think we're in the ballpark.

    The Sport Cub is an LSA, and Cubcrafters claims a significant power boost due to the low restriction of this exhaust system. Since we're operating CAR 3 certified aircraft, we have to be wary of making any assertions as to improved engine performance, but... I observed a very strong static rpm, and I'll be running a coarser prop pitch than the old installation.

    There is one potential drawback to this system that I didn't consider before plunging ahead, seduced as I was by the promise of more power. Because of the "four-into-one" configuration, the heat muffs are fitted to pipes from the front cylinders only. I think we'll have enough carb heat, but I don't know how strong the cabin heat will be. Many of the F-19 operators up here in Alaska have installed C-150 systems in large part because they put out much better cabin heat than the original system. I used to live in Fort Yukon, north of the Arctic Circle, and it's not like I don't know what 40 below feels like.

    Testing and proving this new exhaust will be fun, and I'm optimistic that it will be a strong performer. To get back to the original topic: I'm considering installing an alternate system so I can operate unrestricted while the field approval is pending. The C-150 system would be a strong candidate, but ReeveAirmotive, which holds an STC will no longer sell it. Mac, do you know of any other STCs? Tim, I'm told that there are conversions flying with 337s, but the FAA has tightened the requirements.

    I'll post some updates as this project moves forward.

    All best,
    Doug

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  • astjp2
    replied
    Re: F-19 exhaust system

    The 337 that is in the tech reference section for the 150 exhaust, I wrote it...Tim

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  • MAC
    replied
    Re: F-19 exhaust system

    Some people put Cessna 150 exhausts on as they had mufflers and a better heat system. If you would be interested I have one of those in good condition that I no longer need. MAC

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  • astjp2
    replied
    Re: F-19 exhaust system

    Its all about having an IA that can write up the paperwork in a way that the FSDO must do their job. This is a common modification to upgrade exhaust so I would find a taylorcraft expert in Anchorage who has that relationship and get them to process the paperwork. You might be able to call the ACO in anchorage and ask for their help. Tim

    Originally posted by N3787T View Post
    Mark,

    Thanks for the reply! We're finishing a complete rebuild, engine and airframe, and the exhaust is the last piece of the puzzle. I've had a system built that's based on the Cubcrafter Sport Cub exhaust, but getting an FAA field approval is starting to look like a long-term proposition that could stretch on for a few months. Meanwhile, I'd like to get 87T back in the air, and this could be the ticket. I'll be out of the country for several days for my airline job, but I'm looking forward to talking to you about your old and new exhaust systems. Is there an STC for the Luscombe system, or has anyone pushed through the paperwork for a field approval? I'm too far down the road with the Cubcrafter exhaust to consider installing Luscombe equipment right now (I've heard good things about it), but really interested in the certification process. In the short term, a stock system looks like the shortest route to success.

    All best,
    Doug

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  • Mark Julicher
    replied
    Re: F-19 exhaust system

    Doug,
    I am good friends with Terry Bowden (barnstormer here on the forum) Terry is a designated engineering representative for antique aircraft and he has an STC to put Luscombe exhausts on the T-craft. I do not know if he can help with the Cub Crafters exhaust because I do not know if the F-19 is old enough to fall under his designee certificate.

    I bought this F-19 Exhaust when I discovered I did not have the paperwork for the Luscombe system on my F-19 (also in slow re-build). Then I discovered Terry had the means to get me approved so now I have an excess F-19 exhaust.

    In most cases, Terry is able to produce engineering data for a one-time installation. Some of his projects go on to become STCs if there is enough of a market.

    Leave a comment:


  • N3787T
    replied
    Re: F-19 exhaust system

    Mark,

    Thanks for the reply! We're finishing a complete rebuild, engine and airframe, and the exhaust is the last piece of the puzzle. I've had a system built that's based on the Cubcrafter Sport Cub exhaust, but getting an FAA field approval is starting to look like a long-term proposition that could stretch on for a few months. Meanwhile, I'd like to get 87T back in the air, and this could be the ticket. I'll be out of the country for several days for my airline job, but I'm looking forward to talking to you about your old and new exhaust systems. Is there an STC for the Luscombe system, or has anyone pushed through the paperwork for a field approval? I'm too far down the road with the Cubcrafter exhaust to consider installing Luscombe equipment right now (I've heard good things about it), but really interested in the certification process. In the short term, a stock system looks like the shortest route to success.

    All best,
    Doug

    Leave a comment:


  • Mark Julicher
    replied
    Re: F-19 exhaust system

    I have one in serviceable condition without heat muffs. It could use a new exhaust tip - but otherwise OK.
    I am switching to Luscombe exhausts. I'll send photo. Unfortunately shipping from Texas might not be what you want, so I hope you find one closer.

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