Bell QTR Quad Tiltrotor
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Andrew M, e-mail, 07.07.2022 16:28

I literally saw one flying over the lake at my residence. Thing came out of nowhere and I couldn't hear it till it was right over my head. Next level stuff. I'm glad I got to see this thing in action.

Andrew M, e-mail, 07.07.2022 16:28

I literally saw one flying over the lake at my residence. Thing came out of nowhere and I couldn't hear it till it was right over my head. Next level stuff. I'm glad I got to see this thing in action.

1337painless, 08.03.2011 16:07

I would call that the penguin. The big size may look like it is slow but the quad engines are stronger then you think.

wholesale laptop battery, e-mail, 01.06.2010 09:02

Bell announced in early 1999 that it was studying a proposed Quad TiltRotor (QTR) to meet Future Transport Rotorcraft (FTR) requirements. As projected, the aircraft would feature a fuselage approximately the size of that of a Lockheed-Martin C-130-30, mated to two sets of wings, engines and tiltrotors from the Bell Boeing V-22 Osprey, the rear units mounted on stub wings to extend span and ensure adequate fuselage clearance. Rear tiltrotors could fold in cruising flight, with their engines providing supplemental thrust. The Quad TiltRotor would be able to accommodate up to 90 passengers, or an AH-64, AH-1Z, RAH-66, UH-1Y or UH-60 helicopter, or three HMMWVs, or up to eight 463L pallets.

Provisional specifications include VTOL maximum T-0 weight 45,360kg; STOL maximum T-0 weight 63,505kg; and a payload up to 18,144kg. The Quad TiltRotor was in the conceptual design phase in mid-2000, with water tunnel testing of a 1/48th scale model to visualise complex airflow patterns around the tandem wings and four tiltrotors completed.

In mid-2000 DARPA awarded Bell a US$400,000 phase 1 contract as part of a three-phase, US$6 million cost-sharing programme to study the feasibility of the QTR concept. Phase 1 involved a detailed technology study. In phase 2, a 1/14th scale hovering model of the QTR was test-flown. Phase 3 comprised wind tunnel tests to determine loads and aerodynamic performance of the full-size aircraft.

The first of two demonstrators could be flown by 2006, with production deliveries starting in 2010. Potential customers include the US Marine Corps (to replace Sikorsky CH-53E helicopters and KC-130 Hercules) and USAF (MH-53J combat SAR/special forces helicopters).

Jane's All the World's Aircraft, 2004-2005

Bell Quad Tiltrotor general arrangement

With the Quad Tiltrotor concept, Bell seeks to capitalize on V-22 investments to develop a large payload, high speed, Vertical and/or Short Take Off and Landing (V/STOL) capability for the military within 10 years. The QTR would use V-22 propulsion and support systems: engines, rotor systems, drive train, transmission, hydraulics, electronics, and generators, except that QTR would have four engines, instead of two, mounted on fore and aft wings. The wing structure outboard of the flaperons would also be common; however the front wing would have a slightly longer span than the V-22 to accommodate the wider fuselage The rear wing would be longer than the front wing, putting the rear rotors outboard of the front rotors for higher performance and fuel economy in cruise. The front and rear propulsion systems could be interconnected for additional reliability. The glass cockpit, avionics, instruments, and threat warning systems could also be adapted directly from the V-22.

The QTR fuselage would be the size of a Lockheed Martin C-130-30 Hercules transport, and could transport a wide assortment of loads: eight 463L pallets, 90 passengers, 70 stretchers, a helicopter as large as an AH-64 "Apache", a 155mm howitzer, or three HMMWVs. A rear ramp, rollers and rails would facilitate common logistics equipment used for the C-5, C-17, C-130 and C-141 loading. According to Bell, an advanced concept technology demonstrator (ACTD) could fly by 2005, with production deliveries beginning in 2010. Although it would be possible to use a modified C-130 fuselage for a demonstrator, there are very different structural requirements since the QTR has two wings versus the single wing of the Hercules. For production, lower weight and a better match for the expected payloads would be possible with a new fuselage. Although Boeing builds the V-22 fuselage, Dick Spivey, Bell's Director of Advanced Concepts, said Boeing would not necessarily be a partner on the QTR; either Bell or a subcontractor could build the fuselage. Bell has recently determined that it can eliminate the vertical tail entirely, and provide directional stability via differential rotor thrust.

The QTR would be able to deliver cargo from airfields and port facilities directly to ground maneuver units and to ships at sea, needing as little as 1/2 acre to land. The QTR would allow a practical means to transport up to 13500kg externally or 18000kg internally far from shore bases (due to its size, however, it would obviously not be able to be stowed below deck). With twice the propulsion system of the V-22, the QTR could hover at 45000kg and have a maximum weight of 63000kg; internal volume would be 6-8 times that of the V-22. Maximum unrefueled range would be 3700km and it could cruise at 520km/h.

According to Spivey, Bell has flown two V-22s in close proximity to each other, approaching the distance between the fore and aft rotor system, with no difficulties. Water tunnel tests indicate that the rotor wake from the front rotors in forward flight flow down and inboard, below and inboard the rear rotors. It should also be noted that from 1966 to 1980, some 200 flight test hours were conducted on t ...

Samuel, e-mail, 29.03.2010 19:23

Wow, that's really something. I bet it will be faster, carry more passengers.

Chris, e-mail, 06.05.2008 22:42

Thats is crazy cool. I recently got to deploy along with some of the osprey aircraft and the thought of a 4 bladed version is crazy cool.

coleman, e-mail, 03.04.2008 20:57

i think it is pretty cool but its a problem beacouse if it is too big it is going to be slow and if it is too small you can cary much needed supplies and cargo it should be a ok aircraft if they dont use it as a frontline assualt craft

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