Those in the Erickson Air-Crane fleet are leased worldwide to organizations, companies, and Federal Government agencies for either short-term or longer term use in fire suppression, civil protection, heavy lift construction, and timber harvesting. S-64 Aircranes have been sold to the Italian and Korean Forest Services for fire suppression and emergency response duties. The helicopter is capable of refilling its entire tank of water in 45 seconds from a water slide 18 in (46 cm) thick. The Aircrane can be fitted with a 2,650 US gal (10,000 L) fixed retardant tank to assist in the control of bush fires, and it has proven itself admirably in this role. Since that time, Erickson Air-Crane has become the manufacturer and world's largest operator of S-64 Aircranes and has made over 1,350 changes to the airframe, instrumentation, and payload capabilities of the helicopter. Originally a Sikorsky Aircraft product, the type certificate and manufacturing rights were purchased from them by Erickson Air-Crane in 1992. Seven S-64E variants were built by Sikorsky for the civil market. The Germans did not place an order, but the United States Army placed an initial order for six S-64A helicopters (with the designation YCH-54A Tarhe). The prototype S-64 first flew on and was followed by two further examples for evaluation by the German armed forces. The S-64 had a six-blade main rotor and was powered by two 4,050 shaft horsepower (3,020 kW) Pratt & Whitney JFTD12A turboshaft engines. The Sikorsky S-64 was designed as an enlarged version of the prototype flying crane helicopter, the Sikorsky S-60. You have to increase the weight you’ve been using for this exercise by the smallest increment possible and lift it for your prescribed amount of sets and reps from this point on.Skycrane "Olga" lifting a CN Tower antenna segment It means your body is improving, and this previously ideal weight is no longer ideal for you any more. For example, if you aim for somewhere between eight and 10 reps, the weight should become very difficult for you to lift somewhere around repetition number six.Īs you gradually begin to build muscle and get stronger, you’ll soon notice that your “sweet spot” weight for this exercise is now getting a little too light and easy again. So, when you choose how much weight to utilize your main goal is to lift weights that are heavy enough so that you reach muscle failure after each set. This is also the point when most people start to “cheat” by changing their body posture to help them lift the weight. Although you can push on for another rep or two, the struggle indicates that your muscles have just about had it. What does “start to struggle” mean? It’s when the speed at which you lift the weight slows significantly. However, if you start to struggle on your 8th rep, you’ve chosen the correct poundage. If all 10 seem easy, then the weight you’re using is too light. That is, the lower the number of repetitions, the heavier the weight you should use. In other words, choose the heaviest weight that allows you to complete all of the prescribed repetitions. You might want to incorporate lighter weights now and then-to give your muscles a break and also to improve their ability to generate strength for longer periods. Weights below these thresholds are fine for building endurance.If you can lift 100 pounds, this means you’ll usually be using 80 to 90 pounds in your workouts. For maximal gains in strength and muscle size, use weights at 80 percent to 90 percent of your 1RM.
If the most you can lift one time is 100 pounds, the minimal 1RM for strength gain is 60 to 65 pounds.
Numbers aside, you can trust your intuition. Trainers call this intensity, and there are all sorts of formulas for figuring out what intensity is right for you. How much weight should you lift to gain muscle mass?
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