Author Topic: Twin helio  (Read 24757 times)

Doug Johnson

Twin helio
« on: March 25, 2011, 09:06:24 PM »
I found these pics on internet (click on photo to enlarge)

Helio H-500/U-5, A, B




 
« Last Edit: July 08, 2015, 08:16:36 AM by Doug Johnson »
Doug

Doug Johnson

Re: twin helio
« Reply #1 on: March 25, 2011, 09:37:02 PM »
left one out

« Last Edit: January 19, 2016, 03:47:19 PM by Doug Johnson »
Doug

greatlakeshelio

  • Guest
Re: twin helio
« Reply #2 on: March 26, 2011, 07:26:31 AM »
Only 7 were built for one way missions by the CIA and development started in 1958. When certification took place in 1963 only a demonstrator was flying. Originally, the concept was for the most part a failure. Equipped with two Lycoming O-540-A2B's (250 HP per side) The Helio H500 Twin was about the ugliest thing with two engines released to the market, no one wanted it. Lynn Bollinger has his head up his butt, too much emphasis was placed on the situation in Southeast Asia through military procurement. He was buddy-buddy with then Sec. of Defense Robert S. McNamara. The 500 twin was used for one-way missions onto Communist China, whereas transfer of these airplanes was through Air Asia LTD. a dummy company and front for the CIA. They were also to be utilized for the overthrow of Cuba when Batista was ousted. We know what happened there with the Bay of Pigs and later Cuban Missile Crisis. Helio Aircraft Corp. tried to market the twin in the civilian market with no success.

Doug Johnson

Re: twin helio
« Reply #3 on: March 30, 2011, 07:19:27 PM »
I found this over at the 1000 pictues site I think. granted it was a failure but its interesting because it was a part of Helio.

05/31/2009. In early 1958, Helio announced a development of the Courier, powered by two 290 hp Lycoming IO-540-A2B engines fitted on the wings, and a retractable nose-wheel. However, when construction of the prototype started in October 1958, it was decided to use the 'standard' fixed tail wheel. Edit; The fuselages were produced by ALAR-Empresa Iberica of Lisbon, Portugal. Not true those six were the abondoned H-580 The prototype N92860 made its first flight in April 1960, gaining the FAA Type Certificate on June 11, 1963.
Reportedly only seven aircraft were produced, Allegedly prototype 1 and Prototype 2 were built under a black ops funded program (CIA) for evaluation (not true). two received the USAF designation U-5A, s/n 59-5955 and 59-5956, while another three became U-5Bs, s/n 63-8072 to 63-8074. All seven received an FAA registration, before ending up with the CIA in Indochina, eventually listed on the Indian Department of Civil Aviation Registry (in brackets the month/year of registration in India): All were used mainly in Tibet and all but one was lost there.
c/n 1, N92860, VT-DVE (02/1967)
c/n 2, N8745R, VT-DVC (02/1967)
c/n 3, N10033, VT-DTZ (10/1965)
c/n 4, N10034, VT-DVM (12/1967)
c/n 5, N10035, VT-DTY (10/1965)
c/n 6, N10036, VT-DVL (02/1967)
c/n 7, N10037, VT-DVD (02/1967)

Doug
« Last Edit: July 08, 2015, 08:14:59 AM by Doug Johnson »
Doug

Doug Johnson

Re: twin helio
« Reply #4 on: April 19, 2011, 09:34:34 PM »
I found a twin uglier than the H-500.



« Last Edit: March 27, 2013, 12:11:04 PM by Doug Johnson »
Doug

Doug Johnson

Re: twin helio
« Reply #5 on: May 17, 2011, 09:42:16 PM »
I found some more information.


The CIA's U-5 Twin


AF-1 & AF-2   Helio   U-5

Prototypes no. 1 N92860 and no. 2 N8745R  were probably built simply as H-500 prototype design examples by the factory used as demonstrators and later sold to the CIA.

59-5955/5956   Helio   U-5A

5955 (c/n 3) registered N10033 experimental '62, Continental Air co FL research and compile performance data at high altitude, as equipped with the Standard STC approved configuration of the Riley Turbo-Superchargers and exhaust temperature mixture control indicators conv to U-5B '65, Marathon Aviation corp FL modified, with installation of a temporary ferry fuel system of 81.8 gallons, (range ?) 785 miles (standard tanks wing Bladders 60 gallons nose bladder 37 gals = 97 gal), 1,470 miles (with tip tanks 104 gallons), (ferry range) 81.8 gallons ferry tank installed total fuel 282 gals range 2,500 miles, for Export to Thailand ? , then India as VT-DVE.

5956 (c/n 4) registered N10034, upgraded to U-5B then India as VT-DVC.

63-8072/8074   Helio   U-5B

8072 (c/n 5) registered N10035 then India as VT-DVM reappeared 1975 as N48130 but hasn't survived until today.
8073 (c/n 6) registered N10036 then India as VT-DVL.
8074 (c/n 7) registered N10037 then India as VT-DVD.

The B model upgrade consisted of a 290hp Lycoming TIO-540-A1A or using STC SA 305 SO (Installation of Lycoming IO-540-C2C engines, 31A10 Rajay turbochargers and modified fuel system for intended high altitude operation. The slotted 10" chord naca 4418 airfoil seen between the engines gave limited center section boundary layer control and some additional lift at low speeds in landing configuration especially usefull at high altitude fields, and at it's attached angle probably gave no lift in cruise atitude much like a fixed canard. 52 gal wing tip fuel tanks were added for extended range and loger endurance, total 256 gals.

The 7 completed U-5B's and an additional 10 un-assembled but complete U-5B's as parts were delivered to the USAF which in turn released them to the CIA. The incomplete U-5s no. 8 & 9 were converted to The prototype Stallions no. 1 & 2

Winter 2005 issue of Aviation World has 2 photos of a U-5A bearing the tail number 90336, it's believed to be a fake number ,  while they were being evaluated by Army Special Forces at Hulbert Fld, FL.

Curiously because the U-5 met FAA requirements marginally and it was certificated to meet immediate needs for service in Vietnam, (none were ever used in Vietnam, it was immediately turned over to the CIA), it was given an Airworthiness certificate with the understanding no civilian models would be built. That led to the beginning of the never completed civilian 2 twin engine H-580 (290hp IO-540 each) with a retractable nose gear, program. Although the FAA had labeled it marginally airworthy, Larry Montgomery (Factory pilot) said it was the best handling twin of any type ever produced and the pilots that flew it in Tibet loved it, they claimed it could fly all day on a single engine, without the difficulties generally associated with single engine operation of twin engine aircraft.

All were primarily used, and all but one, were lost in Tibet, while being used by the CIA in cooperation with India's Intelligence Agency's, "Air Research Center". C/n 4 allegedly reappeared briefly in 1975 as N48130, probably while on its way to Davis-Montham, it hasn't survived until the present time.
« Last Edit: July 08, 2015, 08:31:45 AM by Doug Johnson »
Doug

Doug Johnson

Re: twin helio
« Reply #6 on: November 11, 2011, 12:35:53 AM »
Popular Science write up gives some different views of it, that I've never seen before.

« Last Edit: January 19, 2016, 03:44:40 PM by Doug Johnson »
Doug

Louis

Re: twin helio
« Reply #7 on: November 11, 2011, 06:49:57 AM »
I want one of these ugly thing !!!

Louis

Doug Johnson

Re: twin helio
« Reply #8 on: November 12, 2011, 02:01:07 PM »
I ran into this, maybe some one can help him

Chris Byler, Mo http://www.aero-web.org/specs/helio/u-5a.htm
Needing some more information on what I might have in my possession. I recently came to be in possession of a fuselodge of what i believe to be a Helio twin. Interesting thing is that this one is Number 002 of of the assembly line and was used for test purposes only. The badging on it states this : serial #: 002
a/c model: H-580
part no: 580-040-403
Any help with what I have obtained would be greatly appreciated.
10/09/2005 @ 19:53 [ref: 11437]

also found some information about the H-580

FLIGHT International, 23 January 1969

LIGHT
COMMERCIAL
& BUSINESS

New. High-speed STOL from Helio. Now nearing completion
is the first prototype of a new twin-engined Helio STOL sixseater.
The important feature of this aircraft is that it will combine the
performance and efficiency of a light twin with the STOL capabilities
for which Helio single-engined aircraft are famous. The new model
is the H-580 Twin Courier. The general layout is not unlike that of
the Pilatus Twin Porter, as may be judged from the artist's
impression on this page.

Only the nose undercarriage of the tricycle landing gear is
retractable. A large part of the airframe will be built in
Europe and then shipped to the USA for completion.

McAlpine Aviation, UK agents for Helio for many years, are
keenly interested and associated with the H-580 and hope to
take early delivery. Their manager, Capt R. Young, believes
the H-580 will be an admirable charter aircraft in view of its
speed, STOL capability and excellence as a camera platform
for general photography. The basic ex-works price is $85,000
(expected to be around £45,000 fully equipped and delivered
in the UK).

The H-580 has a crash-resistant steel-tube cabin structure
and boundary-layer control, which promises good single-engine
control at very low air speeds.

H-580 data: Engines, two Lycoming IO-540-A1A5 of 290 b.h.p.
Dimensions: length, 33ft 6in; height, 12ft 4in; span, 41ft. Weight:
gross 5,1001b, empty 3,4631b. Useful load, 1,6371b. Performance
(sea level, still air): take-off, (ground roll) 380ft, (over 50ft) 630ft:
landing, (ground roll) 330ft, (over 50ft) 630ft. Speeds: minimum
(fully manoeuvrable! 33 m.p.h., single-engine (fully manoeuvrable*
55 m.p.h., maximum at sea level, 196 m.p.h., best cruise 190 m.p.h.,
economy cruise 165 m.p.h. Range (no reserves), 785 miles (standard
tanks),, 1,470 miles (with tip tanks), 2,500 miles (ferry range).
Service ceiling: both engines 20,000ft, single engine 6,500ft.

This is how far the factory got before they ran out of money.
« Last Edit: November 12, 2011, 02:58:23 PM by Doug Johnson »
Doug

Doug Johnson

Re: twin helio
« Reply #9 on: March 26, 2013, 08:27:40 PM »
Found another U-5B twin photo, reportedly taken in Tibet.

Some big mountains in the background.

Doug

Doug

gearedone

  • Guest
Re: twin helio
« Reply #10 on: March 27, 2013, 10:56:28 AM »
Contrary to popular belief, and documentation shown here in the corresponding production run of the ill-fated Helio 500 Twin. None of the first 6 airplanes were outfitted or constructed by ALAR Empressa in Lisbon, Portugal

Not until the introduction of the H580 Twin (proposed) were any mock-up, fabricated components welded or fabricated outside the US.

The first batch of U-5, U-5A/B Twins were all assembled in Norwood, Mass. You will notice the hydro-foil slat that is fixed between the engine nacelles of the U-5B and the improved performance of Lycoming IO-540's with optional Riley Rajay turbocharging as an improvement over previous models. This airplane was designed and conceived from a wooden mock-up, much like the Stallion.

Stephen

Doug Johnson

Re: twin helio
« Reply #11 on: March 27, 2013, 12:08:55 PM »
Stephen,
Thanks I never noticed the error in the 1000 pictures information before. I went back and edited.

Do you have any more on an H-500 wooden mock up.

I have found no mention of a Mock up Stallion either

I have found a couple of references to 9 Helio twins nothing proven yet but the fact that the 5 twins were registered N10033 thru N10037 and that Helio stallion prototype no.1 & 2 made from parts of two incomplete U-5's and registered N10038 and N10039 leads me to believe it.

A condensed FAA file for the the first U-5A is,

c/n 1 s/n (59-5955) built 04/60 H-500/AU-5A Twin, N92860 experimental '62, Continental Air co FL research and compile performance data at high altitude, as equipped with the Standard STC approved configuration of the Riley Turbo-Superchargers and exhaust temperature mixture control indicators conv to AU-5B* '65, Marathon Aviation corp FL modified, with installation of a temporary ferry fuel system of 81.8 gallons,  (range ?) 785 miles (standard tanks wing Bladders 60 gallons nose bladder 37 gals = 97 gal), 1,470 miles (with tip tanks 104 gallons), (ferry range) 81.8 gallons ferry tank installed total fuel 282 gals range 2,500 miles, for Export to Thailand  ?, VT-DVE India

I haven't gotten the FAA files for the other Twins, Should eventually get a file for c/n 2 N8745R but since 3-7 were handed over to the CIA the files may be empty because they were only given Civil Registry for the ferry trip. To Thailand ?

Doug

« Last Edit: March 27, 2013, 12:41:22 PM by Doug Johnson »
Doug

gearedone

  • Guest
Re: Twin helio
« Reply #12 on: March 27, 2013, 12:45:39 PM »
Doug,

If only R.L. Devine were still around, we probably could disseminate that information. I do know however that through correspondence I have via Prof. Lynn Bollinger is that Kaman Helicopter was involved with military contractural agreements with Helio Aircraft Corp. before they moved to Hanscom Field in Bedford, MA in late 1963  during which several components were manufactured by Helio for other assignments. Including defensive programs for the F-4 Phantom II.

When the 500 Twin nearly bankrupted Helio, the leftover tooling was incorporated into the Stallion program, more or less to revive the company assets. 78% of the 500 twin was integrated into the Stallion, the wooden mock-up was built up during the transition to Bedford. I'll dig into my research files to find any existing docs to support these findings. It's out there, just have to find it and it will not be connected with any FAA reports.

Louis

Re: Twin helio
« Reply #13 on: March 27, 2013, 09:56:40 PM »
I love this term " Reverse tricycle landing gear" instead of "tailwheel"

Louis

Doug Johnson

Re: Twin helio
« Reply #14 on: April 09, 2013, 09:43:56 AM »
I need one of each with a Helio wing

http://www.youtube.com/watch?feature=player_embedded&v=blEZKG9LybM

Here is a big amphib it's a shame it was never placed into production.

Doug