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Author Topic: HyperBipe Sorrell SNS-7  (Read 1176 times)
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Greg Langelius
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« Reply #25 on: July 19, 2020, 01:39:47 PM »

Some time ago; I printed out some plans from this design, scaled up 185% to get a 24"-ish w/s.

Hoping to get around to the build some day; it's a whole 'nother airplane...

Mine should be built with proportionally smaller lumber.

I love stagger wings. With proper incidence; they can be very hard to stall, and may be able to handle a lot of thrust.

Lower, leading wing has some more incidence. As it stalls, the upper, trailing wing remains flying; COL moves aft, initiating downward pitch control input. The aircraft becomes a temporary high wing, with better roll stability. Lower wing unstalls, and reasserts lift. This reestablishes original angle of attack. With more dihedral in lower wing; roll stability stays near identical in both modes. More still can moderate torque roll.

Incidence and dihedral are important to this concept. The aircraft is right on the edge of transitioning between being a biplane and being a high wing as angle of attack varies. Higher angle, high wing; lower angle, biplane.

I built a Manhattan cabin to test this. All it really needed was some more thrust to get up there into the rafters.

I is a slug, building-wise.

Greg
« Last Edit: July 19, 2020, 02:15:47 PM by Greg Langelius » Logged

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bgrove
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« Reply #26 on: July 20, 2020, 12:02:16 PM »

I'm getting down to the final steps.  I attached the upper wings and covered the spinner yesterday.  I'll attach the lower fin and tail wheel next, then the wheel pants.
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FLYACE1946
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« Reply #27 on: July 20, 2020, 12:53:16 PM »

That is very nice. Really coming along very nicely. I know you are really looking forward to flying this one.

Thanks for sharing the journey.
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bgrove
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« Reply #28 on: July 20, 2020, 06:16:00 PM »

I love to share the work, the problems and to solutions.  Whether they work or not :-)

More progress  Smiley

While "working for home" I did some building "from home"  Ha.  I brought the plane up to my office and attached the lower fin and tail wheel assembly.  Next up is the attaching the wheel pants.
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bgrove
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« Reply #29 on: July 20, 2020, 07:18:05 PM »

a few more photo of my progress :-)
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DHnut
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« Reply #30 on: July 20, 2020, 07:30:54 PM »

That is good use of your coffee break.
Ricky
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bgrove
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« Reply #31 on: July 20, 2020, 07:41:26 PM »

 Smiley  Times are really quite different today. 

I'm so thankful my business is busy and I'm doing well. That is not true for everyone.  I wish them the best for everyone and hope I can help support other businesses that are struggling.

I think we will have to look to 2021 for some sort of stability and solution.  Fingers crossed.

What did the English say during WWII?  "Stay the course"!!

I'm Staying The Course!!

Brad
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OZPAF
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« Reply #32 on: July 21, 2020, 01:14:01 AM »

Cheers Brad - I agree. All the best.

John
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bgrove
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« Reply #33 on: July 24, 2020, 03:57:59 PM »

I'm calling the HyperBipe done!!  Here are some final shots.  I did a couple of test glides and she will definitely need nose weight.  Current final weight is ~25 grams. 

And a bonus shot of my wife, Sue, and I on an adverture/hike yesterday at Kalama Horse Camp by Mount Saint Helens followed by a picnic at Lake Merwin, Washington.
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OZPAF
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« Reply #34 on: July 24, 2020, 07:36:38 PM »

Striking I think would be the word for your HyperBipe. It looks a nice area for hiking - glad you were able to take advantage of it.

Cheers
John
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Pete Fardell
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« Reply #35 on: July 25, 2020, 01:56:53 PM »

Very slick HyperBipe! Looks great.
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