HungaroCopter – Hungaro Helicopter

Smooth flying Hungaro Helicopter

Hungaro Helicopter

The Hungaro Helicopter´s Specifications

  • Rotor radius / diameter: r = 3500mm / D = 7000mm

  • Number of blades: N = 2 pcs

  • Blade´s profile: NACA0012; (type: Schweitzer, MD500)

  • Size of rotor surface: Ar = p*r2 = p*(3,5m)2 = 38,465m2

  • Surface load of rotor: DL = 102,01N/m2

  • Main rotor rpm: n2 = ((w2)/(2PI))*60sec = 545,95 rpm

  • vmax = 200m/sec

  • Engine: n1 = 4900 rpm; w1 = 512,91 1/sec. (nominal rpm)

  • Tail rotor rpm: n = 3000 rpm

  • Calculated uplifting: 6,5 m/sec

Hungaro Helicopter Main rotor

  • Input rpm: 3000 rpm

  • Input torque: 255Nm

  • Output rpm: 545 rpm

  • Output torque: 1490Nm

Hungaro Helicopter Tail rotor

  • Input rpm: 3130 rpm

  • Input torque: 35Nm

  • Output rpm: 3130 rpm

  • Output torque: 35Nm

Hungaro Helicopter Pulley with free-run sprag clutch

  • Rpm: 3130 rpm

  • Torque: 255Nm

  • Pulley tightener force: 10000N

Hungaro Helicopter Pulley and engine shield

  • Rpm: 5300 rpm

  • Torque: 150Nm

  • Pulley tightener force: 10000N

Hungaro Helicopter Frame

  • Max uplift weight: 430kg

  • 7000 millimetres = 22.9658793 feet (22 feet 11 + 19⁄32 inches)

“You probably haven’t seen this one yet. They have a booth at the tradeshow in Freidrichstafen Apr 15-16th. Similar construction to a Cicare CH-7 but simpler and using a Subaru engine (good choice). Lots of power. Listen to that motor hum (Supertrap muffler?). Looks like a well engineered product, using what appears to be Robinson tail feathers. There are 3 other videos on the page.”

Looks like they borrowed the panel from an old R22 & reworked it a bit. The slotted section of that rotorblade looks like an attempt to soften the blades torsional rigidity. I fear cracks eventually may start at each slot. It sure looks like it is fun to fly…

When I see someone designing and building an all new ship, no matter how great the workmanship appears, I keep in mind what I once read from Frank Robinson’s writings. I may have the exact percentage wrong but I think I’m close.

He said 80% (??) of the design cost, 80% of the production cost, of any helicopter, is in the gearboxes and rotor blades. For any helicopter builder’s handiwork to impress me, I need to see details of a MRGB, TRGB, and rotor blades, first, before a beautifully powder-coated frame.

When BJ sent me a 1+ hour video of disassembled, miniaturized Jet Ranger MRGB and TRGB that were destined to be the heart of the Helicycle, I WAS IMPRESSED. The oil system, the pinion and ring gear, the bearings, the casting, etc. really blew me away.

EDITOR: In my personal opinion – this is the vision of the “perfect homebuilt helicopter“. An affordable, reliable four stroke engine, nicely triangulated airframe, and advanced composite rotorblades for improved flight control and efficiency.

Review Date
Reviewed Item
Hungaro Helicopter - HungaroCopter
Author Rating

2 Comments on "HungaroCopter – Hungaro Helicopter"

  1. I am enquiring more information on this product. Anything you can forward me on this topic would be appreciated!

Leave a comment

Your email address will not be published.


seventeen − six =