Back Bell 206 / YOH-4A
1962

Bell YOH-4A

Four-seat lightweight observation helicopter powered by a 250hp Allison T63 turboshaft engine. Produced to a US Army specification and first flown on 8 December 1962. Five delivered; originally designated HO-4 by the Army but subsequently redesignated OH-4A. Evaluated against Hiller and Hughes prototypes. No further production.

M.Taylor "Jane's Encyclopedia of Aviation", 1989

The YHO-4-BF. The fuselage strengtheners are prominent

In 1960 the Army launched a design competition for a new Light Observation Helicopter (LOH). The specifications called for an aircraft with a 175kph minimum cruising speed, 180-kg payload and accommodation for up to three passengers in addition to the pilot. Twelve firms submitted design proposals, and in May 1961 Bell, Hiller and, somewhat belatedly, Hughes, were named as finalists in the LOH competition. Each of the three companies was subsequently awarded a contract for the production of five prototype examples of its proposed aircraft; these prototypes were initially designated the YHO-4A (Bell), YHO-5A (Hiller), and YHO-6A (Hughes), though in 1962 they became YOH-4A, YOH-5A, and YOH-6A, respectively.

The YOH-4A, which bore the company model number 206, made its first flight in December 1962. The aircraft featured two-bladed main and tail rotors, skid landing gear, and a conventional pod-and-boom layout with a protruding 'bubble' nose. The five Bell prototypes were evaluated by the Army in competition with the Hiller and Hughes designs and, after the Hughes YOH-6A was declared the winner of the LOH contest in 1963, all five of the Bell machines were returned to the manufacturer. The loss of the LOH competition did not spell the end of the Model 206's Army service, however, for a much- modified derivative, the Model 206A, was selected as the 'Lot 2' LOH winner in 1968 and subsequently entered the Army inventory as the OH-58 Kiowa.

S.Harding "U.S.Army Aircraft since 1947", 1990

Bell 206 / YOH-4A

Technical data for YOH-4A

Crew: 1, passengers: 3, engine: 1 x Allison T63-A-5 turboshaft, rated at 185kW, main rotor diameter: 10.14m, fuselage length: 11.79m, height: 2.69m, take-off weight: 1145kg, empty weight: 693kg, max speed: 217km/h, cruising speed: 179km/h, service ceiling: 6100m, range: 455km

Comments 
Pavel Minowsroki, e-mail, 23.04.2015

Heeft u een lening nodig hebt of om welke reden financiering, zoals: a) Persoonlijke Lening,
Zaken Expansion.b) Start-up en Education.c) Schuld
Consolidatie.?

Stuur Details om barclayfinanceplc@gmail.com naar lening aanvraag te beginnen.

Informations Nodig
naam
adres
staat
land
Bedrag dat nodig is als lening
Lening Duur / Term.

reageren
barclayfinanceplc@gmail.com
barclayfinanceplc@gmail.com

Pavel Minowsroki, e-mail, 23.04.2015

Heeft u een lening nodig hebt of om welke reden financiering, zoals: a) Persoonlijke Lening,
Zaken Expansion.b) Start-up en Education.c) Schuld
Consolidatie.?

Stuur Details om barclayfinanceplc@gmail.com naar lening aanvraag te beginnen.

Informations Nodig
naam
adres
staat
land
Bedrag dat nodig is als lening
Lening Duur / Term.

reageren
barclayfinanceplc@gmail.com
barclayfinanceplc@gmail.com

Pavel Minowsroki, e-mail, 23.04.2015

Heeft u een lening nodig hebt of om welke reden financiering, zoals: a) Persoonlijke Lening,
Zaken Expansion.b) Start-up en Education.c) Schuld
Consolidatie.?

Stuur Details om barclayfinanceplc@gmail.com naar lening aanvraag te beginnen.

Informations Nodig
naam
adres
staat
land
Bedrag dat nodig is als lening
Lening Duur / Term.

reageren
barclayfinanceplc@gmail.com
barclayfinanceplc@gmail.com

shoes, e-mail, 17.06.2011

Finding overhauls and repair facilities for your turbo shaft / turbo prop engines & modules.

APHENGINES, e-mail, 02.09.2009

FOR SALE:
RR ALL 250C20 ENGINE
RR ALL 250C20B ENGINE
RR ALL 250C30P ENGINE

PLS CONTACT US FOR MORE DETAILS

YOSI, e-mail, 23.08.2009

Dear A/C / Helicopter Operator,

My name is Yosi and I am a retired Air Force officer specialized in aircrafts engines and logistics.

In a period of economic crisis as the world faces now, it seems to be reasonable that companies are looking for alternatives in order to reduce their expenditures; therefore, I would like to offer you my assistance as follows:
*Finding overhauls and repair facilities for your turbo shaft / turbo prop engines & modules.
*Finding engines and modules for rent or exchange.
*Finding major engine spare parts in N/F, O/H or A/R condition.
I don't charge commission from A/C owners and operators.
Please don't hesitate to contact me.

lisa mullins, e-mail, 26.05.2009

I'm looking for a motor part# flym23900-9 for anti ice actuator on end item# nylc9463-1

Do you have any comments concerning this aircraft ?

Name   E-mail


All the World's Rotorcraft


Virtual Aircraft Museum


Back AVIATION TOP 100 - www.avitop.com Avitop.com