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Sundowner 50 - a few more recent Jett 56 installations

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Sundowner 50 - a few more recent Jett 56 installations

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Old 09-15-2011, 12:27 PM
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bob27s
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Default Sundowner 50 - a few more recent Jett 56 installations

Thought these might serve as a reference

After a year of flying, and after replacing the original SJ-60LX with the SJ-56LX - this is where things stand.

Dub and Mike Helsel have this set up with the remote mounted off to the side, and use a fueler valve. Makes for a nice installation.

One thing that became clear over time ....... the cowling inlet was too small for some weather conditions (hot as he!! this past summer). More cooling air is a good thing. Dremel helps here.
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Old 09-15-2011, 12:30 PM
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Default RE: Sundowner 50 - a few more recent Jett 56 installations

a few more
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Old 09-15-2011, 12:31 PM
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Default RE: Sundowner 50 - a few more recent Jett 56 installations

others
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Old 09-15-2011, 12:36 PM
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Default RE: Sundowner 50 - a few more recent Jett 56 installations

Examples of a very clean installation.

One thing we learned along the way.... sometimes the plastic engine mounts were flexing and causing bizare engine behavior. Hard to explain, but basically it disturbs the rhythem of the engine. Metal mount helps a lot solid installation. There are couple of companies that are making metal T-mounts that are direct replacements for some of the ARF mounts out there. The one shown here is a jett mount. Not a drop in needs a spacer, new mounting holes. Not a big project. Available set up to mount the needle valve as part of it if you wish (uses the stock needle valve parts)

edit: yes, that is a check valve on this one just before the needle valve assembly. Prevents drawing air in when removing air from the bubble tank.
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Old 09-15-2011, 02:32 PM
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Default RE: Sundowner 50 - a few more recent Jett 56 installations

Nice pics and info. How well does the fueler valve work with a jett bubbles tank?
Thanks
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Old 09-21-2011, 09:10 AM
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Default RE: Sundowner 50 - a few more recent Jett 56 installations


ORIGINAL: smoknrv4

Nice pics and info. How well does the fueler valve work with a jett bubbles tank?
Thanks
So far so good..... seems to work well.

Gets a good draw to evacuate air from the tank. Muffler/fuel pressure helps keep it sealed tightly closed when the engine is running.
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Old 09-21-2011, 02:49 PM
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Default RE: Sundowner 50 - a few more recent Jett 56 installations

What kind of power/rpm loss do you lose with the exhaust deflector added on the Sundowner, I realize you really have no choice.
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Old 09-23-2011, 11:53 AM
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Default RE: Sundowner 50 - a few more recent Jett 56 installations


ORIGINAL: smoknrv4

What kind of power/rpm loss do you lose with the exhaust deflector added on the Sundowner, I realize you really have no choice.
none noted, configured as shown.

The exhaust diverter needs to be larger in diameter than the exhaust opening. No problems.
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Old 09-24-2011, 03:25 PM
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Default RE: Sundowner 50 - a few more recent Jett 56 installations

bob one you could have done instead of opening the cooling air hole is to close off the other air holes in the cowl. closing off those other two would have decreased your air inlet to the cowl by 2/3 but gain about 50% more cooling air to the engine. You normally need 2 times the exithole size as inlet hole size. those other two inlet holes in the cowl are only adding drag and letting the engine run hotter.
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Old 09-26-2011, 09:14 AM
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Default RE: Sundowner 50 - a few more recent Jett 56 installations

Yes, agreed. A few folks have done that.

In most cases that works.

Problem is that only works in flight. When it was "Houston" hot out, overheating on the ground becomes an issue. So a dremel and some massflow are a good thing
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