Daily Archives: July 7, 2016

BTR-3E1 wheeled armoured vehicle personnel carrier

The BTR-3E1 is an 8×8 wheeled combat vehicle designed to carry infantry troops, arms and supplies on the battlefield while providing fire support from a turret mounted gun. It can also carry out reconnaissance, combat support, and patrol missions. The BTR-3E1 armored personnel carrier is designed, manufactured and marketed by the Ukrainian Defence Company UkrespectExport. The BTR-3E1 is based to the BTR-3U Guardian which was developed as a private venture in 2000 by Ukrainian and Unired Arab Emirates companies. The BTR-3U is an improved variant of the Russian made wheeled armoured personnel carrier BTR-80. The BTR-3E1 is the export variant of the BTR-3U. Thailand has placed an order for 96 BTR-3E1 series vehicles and the first of these were delivered early in 2009. The first 2 of 96 BTR-3E1 have been delilvered at U Tapao Airport on 17 September 2010. The second batch of 121 BTR-3E1 with a price tag of 5 billlion Baht have been ordered by Royal Thai Army and 14 BTR-3E1 has been ordered by Royal Thai Navy to be used by Royal Thai Marine Corps.

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Ukraine will produce armored vehicles in Thailand

20:29, 3 November 2015

The signed agreement provides the production of armored vehicles of BTR-3 family

November 2, in Bangkok, Thailand, the international exhibition of triple purpose armament (for Army, Navy and Air Force) “Defense & Security-2015” started its work. The exhibition will run until November 5.

The Ukrainian delegation was headed by Minister of Defense Stepan Poltorak. Representatives of the State Concern “UKROBORONPROM” and State Enterprise “UKRSPETSEXPORT” also joined the event.

In the course of exhibition the negotiations between members of the Ukrainian delegation, Vice-Prime Minister – Minister of Defense of Thailand Prawit Wongsuwan cand the senior military leadership of the country took place. The negotiations concerned the extension of military cooperation between two states.

Ukrainian product of the Defense Industrial Complex as part of joint stand of the State Concern “UKROBORONPROM” was presented by “UKRSPETSEXPORT”. In particular, the exhibition presented new samples of anti-tank guided missiles, demonstrated MBT “OPLOT” APC-3E1and other military equipment. This year the exhibition “Defense & Security-2015” is attended by 37 official delegations from all around the world and 400 defense companies from 50 different countries.

Earlier it was reported that Ukraine and Thailand discussed the possibility of joint production of Ukrainian armored vehicles, including BTR-3E1. Production will be concentrated on the territory of Thailand. Source 112.international

Armament

ztm-1_30mm_cannon_turret

The BTR-3E1 is fitted with the BM-3 Shturm turret. The turret is armed with a ZTM-1 30 mm automatic gun which can be remotely operated to provide increased solider protection in hostile environments. The 30mm gun has a maximum firing rate of 330 rounds per minute and can fire AP-T (Armour Piercing – Tracer), HEF-I (High Explosive Fragmentation – Incendiary) and HE-T (High Explosve – Tracer) rounds.A 7.62 mm machine gune is mounted at the left side of the main armament. Three smoke-grenades discharger are mounted to each side at the front of the turret. Anti-tank missile launcher “Barrier” are mounted at the right side of th turret and a 30 mm automatic grenade launcher AGS-17 is mounted at the left side.The Turret is equipped with a fire control system with SVU-500 weapon stabilizer and on track sighting system with TV screen day/night and integrated laser range finder.

Protection

The hull and turret of the Guardian APC are of all-welded steel armour, providing the occupants with protection from small arms fire and shell splinters. A Kevlar liner can be provided for increased protection.The driver is seated at the front of the hull on the left side with the vehicle commander to his right.

Propulsion

The BTR-3E1 used a 8×8 chassis. The BTR-3E1 is powered by a Diesel engine UTD-20 mounted at the rear of the vehicle, coupled to a mechanical transmission. The engine compartment is fitted with an automatic double-action fire extinguishing system. The BTR-3E1 can run at a maximum road speed of 95 km/h with a range road of 850 km. source armyrecognition.com

Thai BTR are fitted with MTU 6R106TD21

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Engine data according to source kbtz.com.ua

Military suspends flight of Surion choppers over defective gearbox

Published : 2016-07-07 11:43
Updated : 2016-07-07 11:43

Korea’s military has suspended the flight of locally-developed KUH-1 Surion helicopter after defects in the imported gearbox were reported following the deadly crash of a Norwegian chopper using the same European component, the defense procurement agency said Thursday.

The EC-225 Super Puma chopper of Norwegian oil company Statoil crashed off the Scandinavian country’s southwest coast on April 29, killing all 13 people aboard.

Korea has recently been informed by the chopper’s manufacturer, Airbus Helicopters, that the crash was due to the defective main gearbox that connects the aircraft’s engine with the rotor system.

“Some of Surion choppers are equipped with the same main gearbox, so the flight of these aircraft has been put on hold to prevent potential accidents,” an official at the Defense Acquisition Program Administration  said.

The multi-role Surion chopper was produced by Korea’s sole aircraft manufacturer Korea Aerospace Industries Ltd. as part of a 1.3 trillion won military procurement project. About 57 percent of the military-use Surion choppers are equipped with the gearbox made by Airbus Helicopters.

Since its first flight test in 2010, the indigenous aircraft has been adapted for military purposes as well as other non-military missions for the police and the firefighters.

With financial reimbursement from Airbus Helicopters, the DAPA plans to replace the defective components by the end of this year, the official said. (Yonhap)

Original post koreaherald.com

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EC225 Main Rotor Head and Main Gear Box Design

EC225/H225 Main Rotor Head and Main Gear Box Design

Following the recent tragic accident at Turøy near Bergen, Norway involving EC225/H225 LN-OJF there is a lot of interest in the Main Rotor (MR) and Main Gear Box (MGB) design of the EC225.  Here we provide some background information on the design and updates on the investigation and regulatory action.

The EC225/H225 MRH/MGB Design

CIMG4051-300x225EC225 MRH and MGB (c) Aerossurance

Unlike some other types, the 11t+ lift load from the Main Rotor is not imposed on the casing of the MGB, but is instead transferred via a Double Taper Bearing to the Lift Housing (see the diagram below).  When static the Double Taper Bearing also transmits the weight of the MR assembly to the Lift Housing.

The Lift Housing is connected to the fuselage via three Suspension Bars (which connect to fittings secured to the fuselage by 4 bolts).  The Lift Housing also takes the suspended weight of the MGB via the Flared Housing.  The MGB is supported underneath by the flexible titanium Barbeque Plate which absorbs the MR torque, longitudinal and transverse loads and damps out vibrations.

ec225-mgb-mrhEC225 MRH and MGB (Credit: Airbus Helicopters via Aerobuzz with Aerossurance Labelling)

The EC225 has a integral Main Rotor Head (MRH) and MR shaft, which mates with output of the MGB Epicyclic Module via a spline.  The five Blade Sleeves (and their associated Blade Dampers) are attached to the MRH.  The composite Main Rotor Blades (MRBs) are fitted to the Blade Sleeves.

As is conventional on a helicopter, the pitch of the MRBs is controlled by Pitch Change Rods connecting the Rotating Swashplate to the Blade Sleeves.  The Rotating Swashplate follows the position of the Non-Rotating Swashplate, which is moved by three flying control Servo Units (not shown above), in responses to movement of the pilot’s Cyclic and Collective Controls.  The Rotating Swashplate oscillates around a ball joint which can also slide up and down a Guide Tube that surrounds the MR Shaft.  Each part of the Swashplate has a two part articulating Scissor.  The one connected to the MRH drives the Rotating Swashplate, while the one connected to the Lift Housing prevents the Non-Rotating Swashplate from rotating.

The MGB is modular, with a main module which drives an epicyclic module and two accessory modules.  Drive from the two 2101 shp Turbomeca Makila 2A engines enters the front of the MGB via two high speed (22962 rpm) shafts (known as Bendix shafts). The MGB Main Module and the 2 stage Epicyclic Module reduce the speed to the nominal Main Rotor speed of 265 rpm.  The Main Module also drives various accessories and the Tail Rotor Drive Shaft (TRDS).

ec225-mgbEC225/H225 MGB Schematic (Credit: Airbus Helicopters via Step Change in Safety)225mgbClose Up on EC225/H225 MGB Main Module and Epicyclic Module (Credit: Airbus Helicopters via AIBN)

The LN-OJF Investigation

The independent Accident Investigation Board Norway (AIBN – the Statens Havarikommisjon for Transport [SHT] in Norwegian) is leading the LN-OJF accident investigation in accordance with the International Civil Aviation Organisation (ICAO) Annex 13 on air accident investigation.

The AIBN have issued the following press releases:

Read entire article: Here

Related news:

Norway helicopter crash: Airbus grounds Super Puma after 13 presumed killed – ABC

KAI KUH-1 Surion: Details