Tprops in a Jet world
03-19-2008 | 07:47 PM
#43
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From: SkyWest Capt.
The EMB climbs at 100% of MAX which is somewhere around 1300 RPM and cruises at 85% (around 1100 RPM). We have a PAX comfort climb which calls for 90% (1175 RPM) above 10K but I'm not 100% about the numbers, like I’ve said it's been over a year since I've flown it. Our profile also calls for 170 kias in the climb until upper teens, but she’ll go or climb faster if needed.
Hey guys, what’s the diameter of your props. The EMB props are 10.5 ft in diameter and sit 18” off the ground. Just curious, the Q props looks huge and the Saab's look small (may not be but they do).
Hey guys, what’s the diameter of your props. The EMB props are 10.5 ft in diameter and sit 18” off the ground. Just curious, the Q props looks huge and the Saab's look small (may not be but they do).
03-19-2008 | 07:49 PM
#44
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Q400 max:1020 climb:900 cruise:850
400 climbs at 850, cruises at 850 and t/o and landing are at 1020. Some 400s have a reduced rpm button which allows you to push it, go props 1020 while rpm stay at 850 unless you go around.
For landing we normally use 850 (we have that reduced NP button). The props stay at 850 until you either land, or run the power levers up to a set amount (ga) - then the reduced NP is canceled and the props run up to 1020. It's great for noise reduction on final.
And yes, I know, I'm probably a dork for even bringing this up.
03-19-2008 | 09:02 PM
#46
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The Q400 is the King of the Props. And I really hope Bomb gives the 400X, or Q500 as I've also heard it referred, the green light. The two biggest hurdles I heard were that the partner companies want to increase the price higher than Bomb marketing wants to go, Bomb wants it to be an incremental follow on aircraft. And frankly they don't have a launch customer yet. I've been told that once someone commits to it Bomb will roll it out. Obviously with some serious gear geometry changes, that tail getting mighty long.
03-19-2008 | 09:39 PM
#48
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Joined: Sep 2007
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The EMB climbs at 100% of MAX which is somewhere around 1300 RPM and cruises at 85% (around 1100 RPM). We have a PAX comfort climb which calls for 90% (1175 RPM) above 10K but I'm not 100% about the numbers, like I’ve said it's been over a year since I've flown it. Our profile also calls for 170 kias in the climb until upper teens, but she’ll go or climb faster if needed.
Hey guys, what’s the diameter of your props. The EMB props are 10.5 ft in diameter and sit 18” off the ground. Just curious, the Q props looks huge and the Saab's look small (may not be but they do).
Hey guys, what’s the diameter of your props. The EMB props are 10.5 ft in diameter and sit 18” off the ground. Just curious, the Q props looks huge and the Saab's look small (may not be but they do).
Oh yea, she'll go forward fast in a climb, you just have to work out the momentum down low. We have one that'll do 230 indicated at 1000 fpm up to about 18K, and by the time you level at FL280, you're around 180K. the last 10,000 feet of the climb usually works better at 700 fpm (min loss of indicated airspeed/1000 feet), then the last 3000 feet at around 500 fpm. It's a fun bird to fly.
03-19-2008 | 10:14 PM
#49
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From: CEO
Actually, they do and quite a bit at that. In fact, that's one of the reasons we ended up with RJs in the first place. Some of you would be surprised to know how many pax are very afraid of flying and in their minds a jet is "safer" than a prop -- the "big" airlines used to fly props, but now they fly jets, ergo jets MUST be safer, plus all jets must be new and all prop jobs must be old. 
It's not smart reasoning, but just watch any news story about aviation and you'll see how clueless the public is about aviation. 
It's not smart reasoning, but just watch any news story about aviation and you'll see how clueless the public is about aviation.
03-19-2008 | 10:20 PM
#50
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From: CEO
Everthing else aside.....the "RJ" revolution was brought on by at the least two things.. one... the desire of mainline mgt to fly small jets on the cheaper AND the perception of TProps to the general public. My sister for one will not fly a tprop... and I HAVE nearly 3000 hours in them.... she doesnt like them...never has... she flies jets 20-25 times a year. Personally I think more care than not.
Companies are investing in turboprops, filling them up at lower cost and seeing high yields and margins.
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