Bell 280 hits 322 MPH
Now this is interesting.....things are speeding up out there!
https://breakingdefense.com/2019/01/...WeZnXe_C34D7n8 |
I believe the V22 can do 275... Not saying it isn't a nice achievement but not groundbreaking |
Relative to Competition
Originally Posted by atakacs
(Post 10370549)
I believe the V22 can do 275... Not saying it isn't a nice achievement but not groundbreaking The Sikorsky and Boeing engineering team are currently busting their butts getting the Defiant to First Flight. And they have my respect. But they more than anyone else the SB>1 probably respect and recognize the groundbreaking FVL schedule achievements of Bell. The little guy in the FVL competition with Goliaths. |
Oh ok it isn't the actual speed achieved but the time it took to get there in the program. Understood. |
Ata Your missing the point. The 280 is an improved tiktrotor design with increased agility and fixed engines with all of associated benefits (minimizing surface heating, improved firing arcs, simpler engines, etc...).. Itt was never meant to be significantly faster than the V-22, but was meant to have significantly better hot/high performance. The time to max speed is only relevant with respect to showing the maturity of the technology and technical prowess of the developing organization. The 280 program has done what it needed to do. It has already demonstrated superior performance and lower technical risk as compared to the SB-1. |
Long List of Achievements
The list of V-280 achievements go on to include major reductions manufacturing and maintenance costs. Not just promises, but validated by applications of similar technology on Bell commercial products. In my opinion however the most amazing V-280 achievement was meeting a very aggressive customer program schedule that few in the industry thought possible. Not even the “Dream Team” comprised of the two largest defense contractors in the world came close to what Bell achieved in 5 years. |
Sultan, I’m curious as to the cruise tip speed? |
I think we will see the V-280 as the winner of this program. Higher speed, longer range and list risk. Well done Bell.
Wonder what the military designation will be? UH-65? MV-25? |
Originally Posted by SansAnhedral
(Post 10373567)
I think they are a pretty good ways away from top speed still - a few friends tell me more than 280 kt was achieved and that was still without the full set of gear doors installed.
Maybe they should dispense with gear doors like on the 737 and other aircraft. Sometimes they are more problems than they are worth. |
Originally Posted by CTR
(Post 10373805)
Maybe they should dispense with gear doors like on the 737 and other aircraft. Sometimes they are more problems than they are worth. |
V-280 to Pause
So it appears the V-280 program will finish its demo effort before the SB-1 even flies: https://www.flightglobal.com/news/ar...compet-455337/ How embarrassing for Sikorsky-Boeing, especially when it was Sikorsky who blocked Bell’s request to slip the original demo schedule. |
Originally Posted by SansAnhedral
(Post 10374893)
They corrected me actually, its not the doors themselves but an actuator supplier who cant seem to get their act together.
I think you would want full doors at those speeds to prevent buffet vibration getting to various components. A 737 flys a lot faster than 280 Kts and does not require separate actuated doors over the wheels. You just design it properly to minimize buffeting. |
300 Kts Sans Doors Sansanhedral :-) Perhaps the added drag from not having doors is not the negative the aero guys thought? So for production the V-280 can dispense with actuated doors and save cost, weight, and improve reliability. FYI. The reused Cessna Citation gear used on the V-280 also did not have actuated doors. |
Originally Posted by CTR
(Post 10371456)
In my opinion however the most amazing V-280 achievement was meeting a very aggressive customer program schedule that few in the industry thought possible. Not even the “Dream Team” comprised of the two largest defense contractors in the world came close to what Bell achieved in 5 years. |
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