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Pusher Park Jets For all pusher jets and jet-like models.

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Old 06-02-2012, 08:35 PM   #1
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Default Prop location

On a foamboard pusher jet can you set the prop up higher than the center of the fuse to keep out of the dirt on the belly landings? Does this force the nose down in flight or create any bad tendencies? I have always set the center of the prop on center with the fuse and I break a prop once in awhile even with a good landing, being the prop is hanging down beneath the prop well.

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Old 06-02-2012, 08:45 PM   #2
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High located thrust line does tend to push the nose down under power.. You may be able to compensate by offsetting the thrust angle so that the projected thrustline passes close to the CG
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Old 06-02-2012, 08:54 PM   #3
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Thanks for the reply. So I would angle the prop down towards the prop well, but won't this prop wash hit the back of the prop well, creating what, I don't know, maybe I should just try it and find out.

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Old 06-02-2012, 09:07 PM   #4
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If it's a 'prop in a slot' design then you are kind of stuck...
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Old 06-02-2012, 09:13 PM   #5
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Not really stuck, just another challenge.........Thanks

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Old 06-02-2012, 09:46 PM   #6
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Use a prop saver?

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Old 07-15-2012, 02:26 PM   #7
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I have put the the motor completely above the main wing/fuse section with no differences in flight tendancies. Only recently have I started to lower the motor into the prop well site. Like I said, I haven't notice any ill effects in either position. I beleive it's just preference to get the prop high enough above the bottom of the fuse for belly landings and no broken props.
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Old 07-16-2012, 03:08 PM   #8
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I agree with Vader. So long as the thrust line remains neutral, you should be able to elevate the motor without causing any pitching issues. And if it does, you can always change the thrust line to accomodate.

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