Back Eagle's Perch Nolan 51-HJ
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Eagle's Perch

TYPE: Twin-engine home-built helicopter.

PROGRAMME: Coaxial pendulum kit helicopter designed by brothers Herb and Jack Nolan of Eagle's Perch Inc. Targeted at the aerial work market, such as agricultural spraying, oil and pipeline inspection and monitoring, animal herding and mustering, search and rescue and police work. Assembly time is less than 250 hours. Many parts available off-the-shelf. Also aimed at unmanned operation.

COST: US$17,995 for the kit, excluding engines and electronics.

DESIGN FEATURES: Stick, rudder and throttle control similar to fixed-wing aircraft. One engine set for constant speed; other used for control of climb, descent and airspeed. Tiltable counter-rotating rotor; no tail rotor. Flight can be maintained on single engine, but helicopter cannot hover. Ballistic parachute for extra safety.

STRUCTURE: Open frame, welded steel.

LANDING GEAR: Fixed skid-type.

POWER PLANT: Two 48.4kW Rotax 582 UL two-cycle, two-stroke, liquid-cooled piston engines.

Jane's Helicopter Markets and Systems

Eagle's Perch with a windscreen installed

Technical data for Eagle's Perch

Engine: 2 x Hirth 2706 rated at 47.8kW, main rotor diameter: 4.42m, length: 4.55m, height: 2.44m, take-off weight: 383kg, empty weight: 237kg, max speed: 129km/h, cruising speed: 97km/h

Comments 
peter walsh, storagehastings=clear.net.nz, 14.02.2014

I have tried to understand why the autorotative control reversal occurs in coaxial helicopters. Increasing the pitch of a rotor should increase the drag, whether powered or not. We know from experienced fliers that this is not correct. Why? Increasing the pitch of a coaxial rotor will cause this rotor to carry a greater proportion of the weight than the other, this will result in the greater pitched rotor trying to SPEED UP to the autorotation of this new weight, the other rotor, being partially unloaded, will try to SLOW DOWN to the autorotation speed of this new lower weight. I think this may be the simplest way to describe the control reversal of the coaxial in autorotation. All reading I have done on this has only confused me, Any one out there want to comment on this?

John M. Medina, globalhelisis=gmail.com, 12.02.2014

Can anyone provide contact information regarding the Nolan Coaxia Helicopter company? It would be much appreciated.

Ing.Juan Mnuel Medina Ruiz, juanelocps=hotmail.com, 08.01.2014

Sir. we proyect the FIRE FIGHTING TOWERS.Require for the COAXIAL HELISIS sistem info.

Best regards Ing. Juan Manuel Medina Ruiz
CPS GLOBAL CEO

Ing.Juan Mnuel Medina Ruiz, juanelocps=hotmail.com, 08.01.2014

Sir. we proyect the FIRE FIGHTING TOWERS.Require for the COAXIAL HELISIS sistem info.

Best regards Ing. Juan Manuel Medina Ruiz
CPS GLOBAL CEO

mike, mm225490=yahoo.com, 02.12.2013

where can I buy the rotor head and drive system I would like to build the rest my self this winter project thanks mike

Peter Walsh, storagehastings=clear.net.nz, 30.12.2012

If the last response was for me, we are using tetering rotors. This limits root stresses on the blades. During testing we will monitor flapping but I do not expect any problems inflight, worst period will be start up when centrifugal forces are at a minimum. Blades traveling in opposite directions still follow similar paths, low at the rear, high at the front, rising from rear to front. Happy to reply to emails,

Peter, archstanton25gmail.com, 30.08.2012

its a great machine brilliant idea .what i would like to know, are the blades on this thing rigidly attached or do they "see saw",................................Peter

james l surber, jandksurber=embarqmail.com, 31.07.2012

i would like to order a kit if i could get the information my addressis 5501 south palace path homosassa florida 34448

pete darkwarrior, witherspeter2=gmail.com, 23.06.2012

This machine is a good simple design, however can it be biult on a slighltly smaller scale, smaller proportions(one motor etc)a microlight version.......Peter

Willmer, thermoionic=libero.it, 09.05.2012

Ron please contact me at thermoionic@libero.it
Thanks

ron, ron.lathim.=gmail.com, 27.03.2012

i have a eagle perch for sale

Peter WALSH, storagehastings=clear.net.nz, 24.11.2011

Good to read your comments on this machine. We are working on a similar project. Calculations have given us a 16ft 6" diameter, 6" chord 8h-12 rotor. Using up to 50hp {rotax 582} we should have 700lb plus flying weight. Shaft drive is to a custom built gearbox, tilting head via a simple arrangement allows the pivot point to be at a point between the 2 rotors.
Low rotor tip speed of 450'/s for efficency, unfortunately makes autorotation stored energy a little low, just need to drop collective within 2 seconds. We are quite interested to know what control forces were needed in the eagles perch so we can consider whether or not to incorporate boosted controls. Any feedback would be appreciated. Peter

DieFree@RonCadby.org, Was involved: hands on., 06.11.2011

I had over a year's involvement with the Nolan brothers. I 'sponsored' and manned booths at Oshkosh and Sun n Fun with them.

I was designing and creating a kit for the original functioning Perch and I could hover it.

The original design had many innovative and first time features:

a) Rotor head design for counter-rotating blades driven by a single shaft. The rotor head itself tilted on two axis.

b) Twin engines drove the single shaft through simple pulley reduction using sprag clutches to allow one-engine drive

c) Engine fuel systems fully independaent

d) Conventional stick-rudder flight controls.

I designed a throttle quadrant that could be manually alternated between fixed wing and helicopter pilot operation

e) A clever canted rudder design 'pointed' the pilot while moving or in hover

f) All control movements, rotor tilt and rudder, were driven by closed loop hydraulics....no cables (except throttle) or push-pull tubes...simple.

As y'all probably know, the blade span was only 12' and a single engine could carry you to a safe skid on landing.

Unfortunately, the Nolan brothers decided to sell everything and my involvement ended.

They were truly ingenious and I treasure the experience.

Peter WALSH, storagehastings=clear.net.nz, 16.10.2011

This concept is rather clever. From what I can see in the video the blades have no pitch control, and will be set at a flying angle. One engine will give enough power to maintain some flying ability. The power from the controllable engine is varied to provide lift off, decent etc. I presume the transmission has a shaft from the engine/s entering from the bottom, power then passing through a differential to the top and bottom rotors. This leaves the rotors to balance the torque automatically. While many may consider this design to be crude, we should take our hats of to the Nolans for coming up with this simple concept. Just consider this machine with controllable pitch and one engine! WOW!

shoes, himyshoes.com=aol.com, 20.09.2011

was lost? Did you ever try landing on one engine, characteristics were what? Very curious!

soccer, jackmack=gmail.com, 13.06.2011

Helicopter but sold the rights to eagels perch years ago we have a few parts left if anyone needs them them

R.Sharavdorj, ojunchimeg=seznam.cz, 22.04.2011

We have ready one small coaxial helicopter project.
For more information please contact me.

Mark, Mark434=gmail.com, 16.04.2011

THere are no plans for a Coaxial rotor system. If you order from Vortech, the plans are so fucking sketchy, you can't make out heads or tail of what to do! The Nolan brothers are not going to release there plans or try and help anyone who asks! The maggot hiroshima fuck with the "CDS I, II and III system" will not return anyones calls and there email addresses are dead links! Everyone who claims to help, has nothing to show and some bullshit ass picture from 10 yards away. You are better off building a conventional helicopter and leave these fucks to their inventions. Just my two cents.

Tony McCreath, tonymccreaths=gmail.com, 06.03.2011

Dear Jack Nolan,

Information I recd explained no autorotate possible in your Coaxial design. This true, and why was that? Many production versions of Coaxial had great characteristics during autos? Guessing during building simplfying controls/complexity that ability was lost? Did you ever try landing on one engine, characteristics were what? Very curious!
Cheers,

Tony
tonymccreaths@gmail.com

robert biesiada, robert.biesiada=free.fr, 06.03.2011

Hello dear Jack Nolan,
I’m really enjoyed to have de privilege to write you some words.
Your coaxial is really fantastic. I am interesting by coaxial helicopters such the XRON 1 of Gyrodyne Company Of America initially designed by V. BENDIX. I am also very interesting by your coaxial helicopter which stupefy me by his maneuverability probably more than the XRON 1. But no tip brake, no visible swashplates … how does-it fly ??? I did not see any video or picture except some of yours showing your first fly. So I wonder if some one else ever build and fly with your model. What did eagels perch do? Any way.. I would really like to discover the secret of Nolan Brother’s coaxial helicopter.
Sincerely, Best regards.
Rob.

jack nolan, jackmary76=aol.com, 10.01.2011

herb and I designed and built the coaxel Helicopter but sold the rights to eagels perch years ago we have a few parts left if anyone needs them them is a vidio on youtube nolan coaxel helicopter

vralapan, morgon.dag=hotmail.com, 04.09.2010

Does anyone know at what rpm the fixed pitched rotors work? and what chord the blades have?
I assume that the skyblazer is the same as this machine...

mike, mm225490=yahoo.com, 25.07.2010

where can i buy a kit for this? and parts are availble? finding alot of dead ends help?

Anthony, phoenix=prismz.com, 05.07.2010

It should be known that Phoenix Rotorcraft is the current owner of all rights to what formerly was known as the Nolan Brothers 51-HJ (Eagle's Perch). It is now known as the SkyBlazer (see online at phoenix-rotorcraft [dot] com/skyblazer). This was never sold to or owned by Air Scooter. We just wanted to clear up any misinformation.

hou, houxiaohui=yahoo.com, 08.06.2010

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wholesale laptop battery, health.electron=gmail.com, 01.06.2010

TYPE: Twin-engine home-built helicopter.

PROGRAMME: Coaxial pendulum kit helicopter designed by brothers Herb and Jack Nolan of Eagle's Perch Inc. Targeted at the aerial work market, such as agricultural spraying, oil and pipeline inspection and monitoring, animal herding and mustering, search and rescue and police work. Assembly time is less than 250 hours. Many parts available off-the-shelf. Also aimed at unmanned operation.

COST: US$17,995 for the kit, excluding engines and electronics.

DESIGN FEATURES: Stick, rudder and throttle control similar to fixed-wing aircraft. One engine set for constant speed; other used for control of climb, descent and airspeed. Tiltable counter-rotating rotor; no tail rotor. Flight can be maintained on single engine, but helicopter cannot hover. Ballistic parachute for extra safety.

STRUCTURE: Open frame, welded steel.

LANDING GEAR: Fixed skid-type.

POWER PLANT: Two 48.4kW Rotax 582 UL two-cycle, two-stroke, liquid-cooled piston engines.

Jane's Helicopter Markets and Systems

Eagle's Perch with a windscreen installed

Technical data for Eagle's Perch

Engine: 2 x Hirth 2706 rated at 47.8kW, main rotor diameter: 4.42m, length: 4.55m, height: 2.44m, take-off weight: 383kg, empty weight: 237kg, max speed: 129km/h, cruising speed: 97km/h

Comments
Benjamin, e-mail, 04.05.2010

The rights has been sold to AIRSCOOTER
James Taylor, e-mail, 30.03.2010

thanks for this post

best logo design custom logo design
James Taylor, e-mail, 30.03.2010

nice plan

logo design stationery design website design
Skot, e-mail, 05.10.2009

I want information on the price of a full kit please reply it seems no one has had any luck so far
Willmer Simonetto, e-mail, 05.09.2009

Hi guys, I'm interested to buy the construction-assembly manual (or a copy of it) of this helicopter. Please contact me at thermoionic@libero.it
Thanks
loustau jose, e-mail, 27.07.2009

Soy Ing Aeronautici ,pilot ,esp turbine , have interesd in coaxial helicopters non engine , have interesed in purchase varios united in europa .
Dude, e-mail, 25.06.2009

The company "Eagles Perch, Inc." apparently no longer exists, at least as an aviation entity. A quick search on Google, when you get past all of the ancient references to this helicopter and broken links, brings up some kind of furniture company. As far as I can tell, only one of these models was ever built. It's probably sitting in someone's garage gathering dust.
Ted, e-mail, 26.04.2009

Where can I find more information on this helicopter??
Alberto, e-mail, 27.03.2009

To all interested, the Nolan Brothers sold their interest to a company named Eagles Perch. I believed they had already sold some Coaxial Helicopters among athers, customers in Japan.
Luiz Henrique, e-mail, 06.03.2009

ID like to know your diretion or send me for to talk about your helicopter in Brasil-Joinville-SC. Have for two seats. Dou you have a representation here?
Thank you
Emilio Villacorta, e-mail, 19.11.2008

Does anyone ever get a reply to our comments? Or does anyone know where to get information on this helicopter, specilly on the coaxial transmission. Will someone please answer. Thank you. Emilio
M.Shaickly, e-mail, 14.11.2008

Is the plan avaialable for purchaise. Can I buy the kit + engines and avionics to be delivered in Lebanon?
Emilio Villacorta, e-mail, 12.11.2008

I have been trying to contact your company eversince I first heard of your coaxial system but never found you. Can you please send an e-mail with your address so I can further communicate with you. Have you ever planned a two seat version? Thank you for your reply. Emilio
richard zipperer, e-mail, 03.11.2008

very interested in building a helicopter would like to see some spec on this model
Ian Oliver, e-mail, 26.07.2008

I,m interested in your aircraft , where are you based.
Regards Ian Oliver
rick mott, e-mail, 08.06.2008

how many have been sold, how many flying, and where can i see one flying
rick mott
Robert Steelman, e-mail, 13.04.2008

Steelman Aviation, LLC
Robert and Tamara Steelman
530-459-3392
steelman1@4fast.net

I am seeking opportunities with your company. We currently own and operate an aircraft maintenance and repair facility in northern CA. I have the Airframe/Power plant and Inspection authorization.
We have complete manufacturing and assembly capabilities. Extensive sheet metal, composite, fabric and tube repair experience in the general aviation industry. We have experience in rotorcraft, and balancing of rotors, multi and single engine aircraft maintenance, repairs and fabrication.

We have all of the tools needed for sheet metal, composite, Fabric or tube repairs and mfg.
Tools on hand are Planish hammer, English wheel, shear, brake; slip rolls, all riveting tools. Rotator frames. The one tool we would have to get is the Chadwick for balancing.

Please contact me if you have any need for assembly or ...

Benjamin, bysison=yahoo.com, 04.05.2010

The rights has been sold to AIRSCOOTER

Skot, scottverucci=live.com, 05.10.2009

I want information on the price of a full kit please reply it seems no one has had any luck so far

Willmer Simonetto, thermoionic=libero.it, 05.09.2009

Hi guys, I'm interested to buy the construction-assembly manual (or a copy of it) of this helicopter. Please contact me at thermoionic@libero.it
Thanks

loustau jose, euromacchine=alice.it, 27.07.2009

Soy Ing Aeronautici ,pilot ,esp turbine , have interesd in coaxial helicopters non engine , have interesed in purchase varios united in europa .

Dude, socket478370=yahoo.com, 25.06.2009

The company "Eagles Perch, Inc." apparently no longer exists, at least as an aviation entity. A quick search on Google, when you get past all of the ancient references to this helicopter and broken links, brings up some kind of furniture company. As far as I can tell, only one of these models was ever built. It's probably sitting in someone's garage gathering dust.

Ted, tedp37=telus.net, 26.04.2009

Where can I find more information on this helicopter??

Alberto, Silva, 27.03.2009

To all interested, the Nolan Brothers sold their interest to a company named Eagles Perch. I believed they had already sold some Coaxial Helicopters among athers, customers in Japan.

Luiz Henrique, lhberto=gmail.com, 06.03.2009

ID like to know your diretion or send me for to talk about your helicopter in Brasil-Joinville-SC. Have for two seats. Dou you have a representation here?
Thank you

Emilio Villacorta, eevvnn=gmail.com, 19.11.2008

Does anyone ever get a reply to our comments? Or does anyone know where to get information on this helicopter, specilly on the coaxial transmission. Will someone please answer. Thank you. Emilio

M.Shaickly, mshaickly=almustaqbal.com.lb, 14.11.2008

Is the plan avaialable for purchaise. Can I buy the kit + engines and avionics to be delivered in Lebanon?

Emilio Villacorta, eevvnn=gmail.com, 12.11.2008

I have been trying to contact your company eversince I first heard of your coaxial system but never found you. Can you please send an e-mail with your address so I can further communicate with you. Have you ever planned a two seat version? Thank you for your reply. Emilio

richard zipperer, brenda.woolard=comcast.net, 03.11.2008

very interested in building a helicopter would like to see some spec on this model

Ian Oliver, oliver61=comcast.net, 26.07.2008

I,m interested in your aircraft , where are you based.
Regards Ian Oliver

rick mott, rmott1=stny.rr.com, 08.06.2008

how many have been sold, how many flying, and where can i see one flying
rick mott

Robert Steelman, steelman1=4fast.net, 13.04.2008

Steelman Aviation, LLC
Robert and Tamara Steelman
530-459-3392
steelman1@4fast.net

I am seeking opportunities with your company. We currently own and operate an aircraft maintenance and repair facility in northern CA. I have the Airframe/Power plant and Inspection authorization.
We have complete manufacturing and assembly capabilities. Extensive sheet metal, composite, fabric and tube repair experience in the general aviation industry. We have experience in rotorcraft, and balancing of rotors, multi and single engine aircraft maintenance, repairs and fabrication.

We have all of the tools needed for sheet metal, composite, Fabric or tube repairs and mfg.
Tools on hand are Planish hammer, English wheel, shear, brake; slip rolls, all riveting tools. Rotator frames. The one tool we would have to get is the Chadwick for balancing.

Please contact me if you have any need for assembly or mfg needs.

Thank you

Steelman Aviation, LLC
Robert and Tamara Steelman

Simpson, WFSimpson=gmail.com, 07.03.2008

For info I can be contacted at wfsimpson@gmail.com

Simpson, WFSimpson=gmail.com, 07.03.2008

I have one of these (about 80% assembled)in my garage.

TERRY LEE, TERRY-LEE=SBCGLOBAL.NET, 28.02.2008

IS THIS KIT AVAILABLE? DO YOU HAVE AN INFO PACK ? PLEASE REPLY WITH COST AND ORDER FORM.

alf crowe, alf.crowe=inspire.net.nz, 09.02.2008

Where can I get more details and but plant ?

Raymond Pilon, rpilon44=hotmail.com, 21.12.2007

IF YOU READ THIS, PLEASE RESPOND, I WANT TO TO BUY AN EAGLE'S PERCH.
RAYMOND

zs, zs_cb=yahoo.com, 18.09.2007

Is this real, or just a cruel joke? Never heard about any of this junk and never seen to fly either! Is this website updates or not?

Darrell, boatiebid=gmail.com, 23.08.2007

a very
nice helicoper fast just what i like very nice

Raymond Pilon, rpilon44=hotmail.com, 25.07.2007

IS THIS HELICOPTER AVILABLE IN A KIT?
ALSO; HOW MUCH INCL.MOTOR AND AVIONICS

RAYMOND,VERY SERIOUS BUYER

FARDIN, engfardin=yahoo.com, 23.07.2007

I am from IRAN.
Is there a plans available , how much?
my email is engfardin@yahoo.com
tanks.
FARDIN

joe angle, pamela147=centurytel.net, 18.07.2007

Is there an info pack, please send it to po box 1305 Marion MT 59925

Andrew Chua, andrew=focusadventure.com, 22.05.2007

Hi ! Where can I buy the kit for such an aircraft ?

Do you have any comments concerning this aircraft ?

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