STOL Reference Information

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DangerZone

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hmmmm.... how can you say the speed it was flying? The attitude should be extremely skyward; in this condition the instrument (anemometer) is not reliable enough.
Anyway I saw a lighter aircraft (ICP Bingo), 503 Rotax powered (50 hp),slots, full throttle (obviously...), flying in a skyward attitude, the anemometer showing something near the zero.(*)
The Bingo came from the Savannah: was a lighter, simpler Savannah; the weight decreased (about 245 kg. flyable); a really good slow flyer (max cruise speed about 110 km/h), funny and really, really safe. No bad habits.

As I said it could achieve the same performances, using 50 hp.(instead of 135) and having a simple, conventional riveted frame.


(*) I have been flying it several dozens hours.
The attitude was indeed quite skyward, the nose was pitched up so there would be little value of the pitot indicator. I fly to this airport often and know the markers and distances on the paved runway. The aircraft was flying above the runway and cleared just barely 50m in five seconds. The wind was calm on the ground. One meter per second is 3.6 kilometer per hour, ten meters per second is 36km/h. Since it roughly managed to clear 50m in five seconds with wind calm, it appeared to fly slightly less than 36km/h. It flew at about less than 300ft AGL so there might have been some wind above ground where the anemometer recorded zero direction and speed, but not much. I have to admit the pilot was very capable, cause flying so low and so slow is really impressive with such a fast aircraft. The Flamingo cruises at 260km/h with a 100HP Rotax engine, so demonstration of such slow flight speed seemed impressive. If you know any other aircraft which can fly as slow as 35km/h and as fast as over 300km/h with a 135HP engine, please let me know.

This following video is of last year's Varazdin Air Show, and the indication EDA 100 used to mean the engine was a 100HP Rotax. However, this year the Flamingo was announced as having a 135HP engine.

[video=youtube;c4723BYmGoU]http://www.youtube.com/watch?v=c4723BYmGoU[/video]
 
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homebuilderfan

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the Risen

I don't know if it can fly as low as 36 km/h (anyway you didn't used any tool to check it...) but the real performances were registered during an official record attempt. They are now official records.
Ask Mr. Porto: I am confident he will be happy to provide them.
 

Little Scrapper

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A J3 cub in the right hands, I'd call that STOL. Old J3 vs Carbon Cub.
 
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Little Scrapper

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Little bit of price difference between the Carbon Cub and J3, about 175 grand less for the J3.
After watching that video I don't think there's anything wrong with the standard factory J3. Plenty STOL for me, amazing performance. How much STOL have we really advanced since the then?
 

Winginit

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Just Stretch Super Stol and Christavia Scratch Build

Kitplanes April 2017


Kit Mag Cover 001.jpg
 

Alex Aero UA

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Viktor Vashchenko has completed development of his new VP-12 aircraft.
VP12_1_400.jpg
Having consolidated its past experience in the development of fixed-wing and rotary-wing aircraft,
type_flay.png
v24_VV2.png
started a new project of the multi-purpose aircraft «VAI-Sparrow»:
VAI_Sprow_400.png
This aircraft combines the capabilities of the most popular and selling aircraft and helicopters, and even surpasses them in many important ways.

«VAI-Sparrow» can compete:

- in takeoff and landing characteristics with «bush» aircraft such as Just,Carbon Cub, Kit Fox;

- in speed, range and carrying capacity with high-speed sports aircraft such as RV-9;

- in safety with twin-engine aircraft such as Tecnam 2006, DA-42;

- in seaworthiness, speed, range and carrying capacity with seaplanes such as Icon 5, Lake;

- in carrying capacity with four-seat aircraft such as Tecnam 2006, DA-42, Secna 172;

- in the cost of the assembled aircraft with such aircraft asCarbon Cub, Icon 5, Tecnam 2006;

- in speed, range, carrying capacity and size of take-off and landing pad with R-22 and R-44 helicopters.

Features of the project:

1. A unique multi-purpose aircraft with helicopter capabilities and high consumer performance not available on the market.

2. A team of experienced and highly qualified specialists led by the project author, who has 40 years of experience in the development of helicopters and aircraft.

3. Demand for such aircraft in the USA, Canada, Australia, China, India and other countries. The market volume is estimated beginning at 2,000 units.

4. A short time to build an aircraft and a small start-up investment.

5. Project development capability in aircraft, engine and systems upgrades, spare parts and other services to generate additional profits.


The company «Vashchenko Aircraft Innovation» is looking for a partner to implement this project.

The main effort will be concentrated on the American market as an aircraft manufacturer country. The company will then establish representative offices in Europe, Australia and other countries.
 

blane.c

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I like the Sparrow.

I would suggest that it be twin boom three engine, the two tractor engines were they are and a pusher between the booms. Total power would remain approximately the same (smaller tractor engines).

Just me, no particularly good and valid argument for the masses three engines are my preference.
 

Pops

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All of the STOL performance is fine if you are heading into the wind, not able to use it all in a crosswind. My SSSC has ailerons of 7' long x 1' cord each and a lot of rudder and a stall speed of about 30/32 mph. Take-off in ground effect at about 28 mph with my 235 lbs.
 

Vigilant1

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I would suggest that it be twin boom three engine, the two tractor engines were they are and a pusher between the booms. Total power would remain approximately the same (smaller tractor engines).
There's a lot to be said for a multiengine airplane with safe performance if one fails. STOL ops (very short takeoffs or approaches on the back side of the power curve) do pose a problem, though, unless the plane has >gobs< of excess thrust so the TO/approach can be safely conducted with one engine out. Without that, during those phases of flight, a multi will be less safe than a single.
 

Pops

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Also the engine comes in handy in handling a strong crosswind.
 

Victor Bravo

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1623098534460.png

The little yellow one is really pretty cool! Alex Aero, please explain the control system for the roll axis, I am very interested to know about this.
 

EzyBuildWing

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STOL DREAMS......ultimate "air-experience" STOL Machine :)
What do you dream of?
How about: almost zero ground-roll, followed by almost vertical climb-out...... to say 3000' just 15 seconds after brake-release!
2-seater of course, with max all-around visibility, and twin-engine safety?
Only one airframe-engine combo fills the Bill.
Lockwood Aircam with twin Steve Henry 300 hp turbo-Yammy's......same weight as a Rotax......

Imagine seeing this Aircam take-off with 600 hp installed, rather than just 200..........wow factor would be off the scale!!!!!
 

Alex Aero UA

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We plan to install two 160 HP Yamaha (Apex) EXUP engines on the STOL «VAI-Sparrow»

"....This is the first-ever 160 HP Yamaha (Apex) EXUP flying anywhere in the world.
What makes this aircraft so remarkable is that this is the first valve-tuned exhaust ever used or tried before on an aircraft. Variable valved exhaust tuning allows more flow at top end, and controls back pressure to increase mid-range power, for an overall increase of HP throughout the entire power band.
The result is more HP with less fuel use. On an aircraft, we are looking to find more power in the mid-range, which will improve lifetime endurance and performance on the aircraft power plant installation..."



 

Island_flyer

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STOL DREAMS......ultimate "air-experience" STOL Machine :)
What do you dream of?


Imagine seeing this Aircam take-off with 600 hp installed, rather than just 200..........wow factor would be off the scale!!!!!
Now add leading-edge slats and double-slotted Fowler flaps and multiply that wow factor by two.
 
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