De Lackner DH-4 "Heli-Vector" / HZ-1 "Aerocycle"
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26.11.2023 04:36

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24.11.2023 23:14

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Michael Wolter, e-mail, 10.10.2022 05:25

Try going to YouTube and searching for “ de Lackner DH-4 Heli-Vector (HZ-1 Aerocycle) demonstration by its inventor Lewis C. McCarty”

Mike Coleman, e-mail, 07.03.2017 22:47

I had the privilege of knowing and talking to Don De lackner. My father in-law bought the machine shop that Don owned (profile metrics in Hesperia, Ca) in 1988 and we are still operating today as Dyell Machine. He was a very nice and humble man. I remember him showing me this one maned helicopter that he had made. He was 85 years old when we bought the shop from him and was working on a flying car. About 10 years ago a man showed up and asked if he could look in the shop. He told me that he was Dons grandson and he used to work with him in this shop when he was a kid. He stood in the middle of the shop, called his brother, and cried as he told him where he was. I have to admit, i almost cried myself. It was sad to learn that after he and his wife died (from what was told to me from a family friend who called to say Mrs De lackner had passed) there was no money left behind to family, allegedly because of who ever was handling there money (and from what i know it was millions).

Ilona Kappel, e-mail, 19.01.2016 02:19

Iwan Benzler, steh endlich zu Deinem Kind. Du hast mich an der Brse Stuttgart geschwngert bevor man Dich gefeuert hat. Jetzt hast Du Dich bei Weber zum Huserverkaufen beworben. Das klappt nie. Ich beantrage einen Vaterschaftstest. Zahlen musst Du sowieso und wenn Deine Sippe auch das letzte Haus zwangsversteigern muss!

Arlan Sheetz, e-mail, 07.12.2015 00:57

I would love to have a set of plans. As a manufacturing eng this looks great

poop werner, e-mail, 16.05.2015 23:25

This is waldschmitt, me from Johannesberg. BTV - "BE the victorious" is The name of the Game. Who said Tennis? I say Rentner, You say not. I say working, You say "You do not".

George Webber, e-mail, 07.01.2014 20:39

I only wish I could see a video of the Texas test flight. This was were my father was hurt and it lead to his death.

az protottp, e-mail, 22.11.2013 15:56

building is easy, but I found a problem in doing so because outboards need warm water if not , does anyone know how to solve the problem?
I thought I'd stick a hose between prencipal shaft connecting the engine and no cushion under the rotors , worked ?

Stewart Bailey, e-mail, 05.02.2013 06:39

The original prototype, the DH-4 Aerocycle, registered N64N was recently discovered in storage in the building used by DeLackner in Mt. Vernon, New York. This prototype was acquirred by the Evergreen Aviation & Space Museum in McMinnville, Oregon. It is currently in restoration, and we would welcome any information that would help us with the restoration project!

Stewart Bailey
Evergreen Aviation & Space Museum

Corey, e-mail, 12.04.2012 02:26

I have one how much is it worth

brinder, e-mail, 09.11.2011 00:41

Anybody know where one can find the original plans for the aerocycle...........

1000km, e-mail, 27.08.2011 16:51

Helmet? Those blades would turn you into hamburger long before your head reached the ground.

lord-ton, e-mail, 26.08.2011 10:29


Scott Etter, e-mail, 21.08.2011 19:54

I had the pleasure if working with Don DeLackner in the 1980's on Apple Valley California , I will remember him as a great man and friend!

Michael, e-mail, 30.07.2010 01:41

@ Joe, I dont think a Helmet would really help in an accident with this beast :D

Guiseppe Paromo, e-mail, 02.01.2010 09:43

I have studied this aircraft extensively. The original designs were actually easier to fly than the later models due in part to the Us army meddling with the design. The orginal had a 20hp water cooled outboard boat engine with open exhaust. Transition to lift occurs around 650 rotor rpm's. It used a planetary gear box below the platform to reverse the rotation of one set of blades. Blades were experimented with largely as was the gearing and pod legs. Original blades were 7.5 feet with the leading tips made of nylon for canceling out the harmonic that would develop. During the testing of this craft there were several serious accidents but none fatal. The final set of blades were 15 feet long with almost 7 foot of nylon making up half the length of the blade. All blades were fixed pitch. When the Us army showed interest in the late 50's the engine was changed to an evinrude V4 making 55 horse power and then increased with the same engine to make 79 horse power. The accidents occured because of tip flexing in response to more horse power which created a substantial harmonic and caused the blades to collide in flight. The pilots were injured severely, but altitude played a part in not causing a fatality due to the accident occuring at about 70-100 feet. The 20 hp version was suprisingly easy to fly even with out trying. Once the engine was runing-the rotors will not turn due to a belt clutch, the operator stands up on the platform and using a belt and leather shoe restrainers, buckles in. Next the clutch handle is released, which allows the rotors to begin to turn. When rotor rpm is stable at around 210 rpm's, the throttle is advanced smoothly to attain 650 rotor rpm. The device will lift off!! As long as you don't lean right, left, back, or forward, the device will hover around 7-12 ft off the ground at around 700 rotor rpm. Leaning in any givin direction, will cause the device to fly in that direction. Flights out of ground effect are harder and not recommended on the 20 hp model. Ground effect limits for the 20hp model are around 20-40 feet.

Yaseff, e-mail, 28.12.2009 16:49

Please send any plans to me at this email address.

I could make great use of this vehicle with flying swords commanded at my feet

lenny clark, e-mail, 27.04.2008 02:11

call me silly but is it a strictly good idea to put a very loosly secured passinger above a big rotating blade shurely this is a recipie for a particluarly un plesent cartoon acsident

David Tuon, e-mail, 04.02.2008 14:27

There must be a company in Spain wich presented a very similar equipment in Paris Air Show 2007. AMAZING. We are working in a prototype, but the rotor aerodinamycs and blade construction (suppouse in carbon)are extremely difficult, and the automatic clutch are very complicated.

jonathan, e-mail, 23.01.2008 15:18

does anyone has some very precize plans of how to build this 'helicopter'? I need to know every detail.

Juan Luis Amilibia, e-mail, 30.11.2007 20:13

Estoy interesado en toda clase de informacin sobre ste aparato

joe, 09.10.2007 00:36

awesome, no helmet!

kyle bissell, e-mail, 08.08.2007 15:19

i pooped

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