Re: Gh Bladed 3 80 Cracked 13
Padre Harmon
Most American smaller helicopters have teetering rotors, which default to two blades. This has been the case from Bell 47 to Bell UH-1 Iroquois. Here again, the UH-1's transmission system was a development of the Bell 47. Again, if you're in US (or for training generally) , you'll be seeing Robinsons, so it appears that there are almost no three bladed helicopters (with Schweizer 300 being an exception).
There are advantages and disadvantages in having different number of blades. In general, the fewer, the better. You pay for more lift, performance and (usually) less noise with mechanical complexity and less efficiency. It's a trade off.
Like with propellers, the blade count on a helicopter rotor is a matter of disk loading. Light helicopters get away with fewer blades. Complexity and losses increase with blade count, so helicopter designers try to fit as few blades as possible. However, this would result in huge rotor diameters for heavy helicopters. There are reasons to keep the diameter small:
I guess you see the trend by now. The UH-1D is the odd man out, but it also stands apart due to its unusually high blade chord. Normally, the ideal loading per blade seems to be between 8 and 9 kg/m, and a little more is deemed acceptable if it allows the designer to get away with only 2 blades.
There is no conspiracy to suppress three-bladed rotors. It's the overall compromise between performance and efficiency which determines the number of blades on a helicopter rotor, and the main driver is mass.
While the above answers have some correct points, they miss the fundamental points of the structure and function of the rotor hub differences in the two and four blade rotors versus the three blade rotors. Both have safety issues that are nuanced, and the difference can change the mission for a given helicopter.
Two and four blade rotors are most likely semi-rigid rotor hubs that are cantilevered off a fixed pin. That allows them move free up and down through the rotation that occurs from lead and lag forces. The limitation for these rotor hubs is that it has almost no tolerance to negative G-forces because negative Gs lead to mast bumping and airframe damage in air. Pushovers have to be very subtle. This requires special training specific to SFAR 73.
Three bladed rotors have a fully articulated rotor head, which prevents mast bumping, so it has greater agility and can handle external cargo. These rotors handle lead-lag forces through hinges at the root of the rotor blade allowing the blade to move forward and aft relative to the direction of rotation throughout the revolution. The primary safety concern in these helicopters is touching down too hard or off balance jarring blades out of balance. If they do, gyroscopic forces react through the airframe, and if the helicopter is still touching the ground, that part touching the ground becomes the pivot point around which the airframe gyroscopic forces act flipping the helicopter over that pivot point. This is more likely on the three-bladed helicopters with skids instead of landing gear. The skids have shocks essentially to prevent the jarring, but if they're bottomed out or flat, the forces go through them unevenly. Helicopters with wheeled landing gear have less issue with that. Here is a good resource about fully articulated rotor heads.
Above 4 blades is when helicopters are looking to reduce noise, balance performance (both lifting capability and agility) and stability; and keeping the frequencies out of the pilot PIO and human factors frequencies become bigger issues.
In addition to the reasons stated in the other answers, there is still a bit more on the subject. Often, the number of blades incorporated into a rotor design is about blade/disk loading, load carrying, speed-performance. Many times the number of blades is driven by vibration / ride quality and noise.
In the case of 3 blade systems, rotor vibration and noise have multiples of 3/rev, 6/rev, 9/rev. 2 AND 4 bladed systems have multiples of 2/rev, 4,rev, 8/rev, 12/rev. Odd numbered systems rarely exhibit submultiples great enough to be of concern, while even numbered systems can cover the spectrum. Think 5 vs 6 blades. The 5 bladed MD500s are almost on par with fixed wing ride quality when properly tuned.
On the other hand, take the Bell 214/214ST. A big 2 bladed example. Even with nodal beam suspension to mitigate 2/rev, these beasts ride very harsh and can only be tuned for hover and one nominal cruise airspeed.
Regarding the subject of noise. In the late 80s Los Angeles County Fire Dept, against the better judgement of the pilots, were mandated to change from the 2 bladed, Bell 205A-1 merely for the reason of noise. They subsequently bought 4 bladed, Bell 412s who's performance numbers, on paper, were stated to be equal if not marginally better. The pilots always preferred the performance characteristics of the 2 blades systems. Been on many max gross takeoffs with LACO Fire from Barton heliport, in 2 and 4 blade ships. The pre-takeoff briefing in the 4 blade 412 was not without reference to the possibility of having to pickle the load during translational lift.
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Another scenario I see from time to time is when a bass will run out of heavy wood or cover, see the bladed model, and then turn back and swim into the cover. I frequently follow up with an ordinary swim jig. That puts them in my livewell more often than not.
When do I get my double bladed lightsaber? everyone has been talking about a bag but i haven't recieved a bag? Where do i get it again and if i haven't then where is a good place to get one. and what about jedi characters?
Only 2 classes (one Republic and one Empire) gets a double lightsaber and that happens when you leave your starting planet and go to the fleet to choose your advanced class (if you choose the one that uses a double lightsaber).
The moment you chose Assassin, a bag appeared in your inventory. Right-click it and you'll get a double-sided lightsaber. If you've accidentally sold or deleted the bag, check the GTN or wait for the one you can get for commendations on DK (requires 14 but you can't use it until level 16). Or, run Black Talon and hope for a drop off the last boss.
If you've been to the Imperial Fleet and you've done the quick quest on there that directs you to your class trainer and you've chosen Assassin, you'll have a container (pack/bag/whatever) in your bags now. Just open it and viola.
However, I noticed that in another thread you asked about choosing between Vette and Jaessa. Is that the same character as you're asking about for the double-bladed lightsaber? Vette and Jaessa are Sith Warrior companions. Sith Warriors use a single-handed light saber (Juggernauts use one light saber, Marauders carry one in each hand).
No longer a secret, the vibrating, rhythmic "thump" of a bladed jig holds a distinct advantage over other classic baits like crankbaits and spinnerbaits that produce similar disruptive action. The user-friendly, compact design of a bladed jig is far less prone to snagging when grinding through wood, grass, and other burly cover. They're also less inclined to catch wind while being cast, allowing anglers to cover open water efficiently and effectively. Working a bladed jig to its potential requires a rod with a medium-heavy backbone to deliver presentations accurately at distance, combined with a light, sensitive tip that both telegraphs the vibration of the bait and loads the rod deep to keep fish pinned.
CI4 is an original material reinforced with carbon fiber that is lighter and has a higher strength than conventional resin material. CI4+ is an advanced version of the original CI4 material and is 2.5x more rigid than its predecessor. The use of CI4+ for the reel seat increases sensitivity and reduces weight while also delivering remarkable rigidity for perfect reel fixation and better rod efficiency.
Spiral X construction consists of three layers: an inner and outer layer of seamless Infinity Tape tightly wound diagonally in opposite directions, and a layer of vertical fibers called Muscle Carbon in between. Utilizing Infinity Tape in place of a traditional sheet of horizontal fibers reduces overall weight and creates actions with superior torsional rigidity and hoop strength.
I recently modded Bladed rounds into my Lanka, thinking it is one of the best weapons that can benefit from this mod due to high crit chance but for some reason I didn't seem to notice a significant difference in my damage if any at all. I already had Vital sense, I'm thinking they don't stack ? If they do, can anyone explain the math behind it ? Because it surely didn't double my crit damage.
If you expected it to double your crit damage, you're right in questioning your math. Effectively, Bladed Rounds functions as a second Vital Sense, and works off the base crit damage mod. With the Lanka's base crit bonus of 2, that comes out to an extra 2.4 times bonus damage from each mod, for a total crit damage of 6.8.
So with Vital sense I already have 4.4x crit multiplier. Say I deal 1000 damage with 4.4x then I'd deal 1545 with bladed rounds. So thats effectively a 50% increase in my damage on crits. Which isn't that significant.
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