GeoGull

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What span on removable wings ultralight experimental do you prefer?

  • 20ft span, 24ft^2 area

    Votes: 3 33.3%
  • 25ft span, 30ft^2 area

    Votes: 6 66.7%
  • 20ft span, 24ft^2 area

    Votes: 3 33.3%
  • 25ft span, 30ft^2 area

    Votes: 6 66.7%

  • Total voters
    9

WonderousMountain

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Apr 10, 2010
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Clatsop, Or
DSCN2802.jpg
I have an engine, G13Ba Suzuki four cylinder. All goes well there will be a picture of it sitting half ripped from it's mooring in a hatchback, definably inaustere with about half of the engineering progress made since the dawn of the last century enclosed. Covered casually in dust, oil, radiator fluid sprinkled with fuel, WD40 a little here and there and a few moments carb cleaner during the restart process. From these beginnings, with more aftermarket and custom parts than sensible or cost effective it will become the generator of power for the "GeoGull"
One may assume it's name, a conjugation of an ancient word for Earth and Gull, a family of birds with a water affinity insinuates that it will be a ground based or swim instead of flying. If that's what you assumed, let me know what the odds are at, I'm curious.
In concept it's a pod and boom single place, with inverted Gull wings, retractable tricycle gear, prop-fan driven, tail configuration including winglets for the horizontals and a trim wing atop the vertical. First model was sightly, informative and lacked durability. Full scale must comes with it's own difficulties, yet the prospect of seeing 1:1 dimensionally appeals to my lazier sense of conceptualization. Many questions arise that simply do not have reasonable answers; like... How do you get crash protection in 3-4 inch under-seat area. Where do you put over twenty gallons of fuel in a minimalist fuselage? What to do about making proper wheels vanish into sleek (thin) wings? Does it even balance out, or woefully dependent on a leadin nose? Enough of that for now;

Now- I have an engine, and it's name is Zuki.

Clear Skies,
LuPi
 
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cheapracer

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Sep 8, 2013
Messages
6,116
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Australian
G13B is a great engine and of reasonable weight.

There is plenty of info out there on them and if need hook up with the Suzuki Swift forum where there isn't much they haven't done.

My Mate gets 180hp at 10,000rpm in his race car with a standard bottom end albeit a hand lightened crankshaft down by 3 kgs.
 

WonderousMountain

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Apr 10, 2010
Messages
1,911
Location
Clatsop, Or
It's been a while, diagnosed with another illness, which probably caused the other illness, but have managed to get off pain pills, but kept the pain!
Things are looking up.

Made a near 1/2 scale model from cardboard and it looked very keen. Unfortunately, I widely overestimated the engine compartment room and my fuselage may need to be shaped around the engine's size a little, but just a little. Just as disconcertingly, the direct drive possibility clashes with form too.

New features include leading edge air ducts for cooling and flow concerns, outward folding landing gear leaving something of a lump underwing, settling on wing form, attachment place. Semi-flatwrap windscreen wheelsize, boom-length and auto conversion component selection.

Instead of posting it, I will refrain until a full scale can be displayed. Thanks everyone for the encouragement, curiosity and selfless hints.
This part of the project is easy to apply myself to, and enjoying the process immensely.

Sincerely,

LuPi
 

WonderousMountain

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Apr 10, 2010
Messages
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Location
Clatsop, Or
Everything has become more involved.

Engine inspection/overhaul now requires seatback bulkhead removal, leaving only the nosegear panel as the only concession to a seamless fuselage. The inverted Gull has foregone the inversion and acquired lengthy legs. The tail is gone completely replaced by thrust vectoring. The engine is planned full conversion towards fuel economy and the wings now are forward swept in the outer panels.

Easy-Peasy,

W. M.
 

WonderousMountain

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Apr 10, 2010
Messages
1,911
Location
Clatsop, Or
My parents just bought me a 40ft by 30ft research and development building by the lake. Pontoons anyone?

Thank you family ties. At worst I'll get a sun tan and swimmers physic.

Blessings Homebuilders,

WM
 

WonderousMountain

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Apr 10, 2010
Messages
1,911
Location
Clatsop, Or
Finished second three view drawings. Fuselage now has a mathematical definition to the seat-back bulkhead, and fair approximation thereafter. Thrust centerline is below center of pressure so abruptly adding power will cause pitch up and cutting it a dive. Wing is very attractive and interesting, at only 2M^2 area stall speed is significant.
There are flaps for pitch, flaps for roll, flaps for lift and flaps for yaw. There is thrust vectoring in just the pitch direction. Stability is near neutral with little margin so coin collections stay home. Prop clearance is, well lets take bets on how long it takes to strike it and ruin the expensive thrust vectoring...

My advice for flying this plane, stay as far ahead of stall speed as you can and have fun.

Scans soon.

LuPi
 
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WonderousMountain

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Messages
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Clatsop, Or
G-Gull.jpgThis explains all you need to know right? CoG issues to come. The idea is to use the inner portion as pitch control, the middle and outer sections are mixed flaps and ailerons as close to CoG as possible. There's an armpit air intake not shown and the wheels retract int the wings. Wingspan is 6 meters. Sections are .8M, 1.1M, 1.1M. Fuselage seat bulkhead removes for engine access. Basically it may work as a glider, but when the engine goes the wing root moves out of the low drag area. Either need a light engine, or an opposed twin. Yes, that's the solution a short stroke opposed. Goodbye four cylinder. Another plane perhaps...

I'm happy everyone satisfied?

Cheers,

LuPi
 
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WonderousMountain

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Apr 10, 2010
Messages
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Location
Clatsop, Or
View attachment 26452You're looking from the rear at my fuselage seatback engine compartment firewall. The triangular tube is clamped in place, affixed to other one possibly with a bolt. Spar sleeves are laid in place and vacuumed to assure proper fit. One flat side against the seatback, the other two forming a V. Essentially a custom top hat section. The vertical fins act as mixed rudder and elevator, extend out of picture, also there is another wing section, fixed with winglets. Not to scale. Triangle tube bonds to a web, and conventional Dcell terminating before the first bend and control fins. Fuselage fully lofted, ready for 3D rendering. Writing possible engine suppliers, then it's propmage's turn, and back to structural, get a mass distribution estimation then work on dynamic handling qualities, only then will it be confirmed feasible as conceived. Thx HBA, WM
 

WonderousMountain

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Apr 10, 2010
Messages
1,911
Location
Clatsop, Or
Received information from Rotron engine representative, the same core used on Parajet Cyclones. The online brochure sadly is under licence, so forbidden to share it. If things go well the propeller specialist can be employed. Getting an important step towards completion. Many changes to the design elsewhere, need three D drafting to really show properly. Maybe as early as next year I will be accepting seed money!
 

WonderousMountain

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Apr 10, 2010
Messages
1,911
Location
Clatsop, Or
Would someone like to participate in the next round of design and prototypes of GGull.

Didn't take into consideration how people expect technology served on a silver platter.

I guess I gave the impress ion this was my baby, it's not. Just a good idea I thought deserved a life.

LuPi
 

WonderousMountain

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Apr 10, 2010
Messages
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Location
Clatsop, Or
Well,

this thread is getting a bit dated.

Anywho, I'm restarting the CAD on this project, much respect to Wizzardworks for the first round. The errors were wholly on my end.


So, what do aero people think about crossectional area distribution. I'm looking to better account for wing, strakes and have a smooth arc type graph for the fuselage.

LuPi
 

WonderousMountain

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Joined
Apr 10, 2010
Messages
1,911
Location
Clatsop, Or
Kidney stones, hydrocodone, Nasaid, Tylonol, Asprin.

It's been about two years now. There's supposedly no cure for me. IDK, I don't give up easy.

Glad to be off them, it wasn't fun, mostly just pain.

LuPi
 
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