With the normal propellers, you can take off up to 2500 m (8200 ft) AMSL. For flying higher, you need the high-altitude propellers, which allow taking off at altitudes up to 4800 m (15.700 ft) AMSL and flying at altitudes up to 5000 m (16400 ft) AMSL..
What is a high altitude prop?
High altitude props have a lower pitch and an increased diameter which will facilitate regaining low end hole shot and higher RPM's. The intention is to help decrease the strain on the motor by lessening the time the driver must be at wide open throttle before the boat will come up on plane..
What is important for the design of a propeller?
Blade Thickness Distribution The radial distribution of the blade profile thickness is also crucial for a good propeller design. From a hydrodynamic point of view, a thin profile should be chosen, as it has a lower displacement resulting in less pressure fluctuations on the outer plating of the hull..
What is the efficiency of propellers at high density altitude?
Answer: Efficiency is reduced because the propeller exerts less force at high density altitudes than at low density altitudes..
Answer: Efficiency is reduced because the propeller exerts less force at high density altitudes than at low density altitudes.
The code has the capability to estimate the performance curves of a given design for use in off-design evaluation. The long term goal of the JBLADE development is to provide a user-friendly, accurate, and validated open-source code that can be used to design and optimize a variety of propellers.
Can a propeller be used at high altitudes?
In addition, the design procedure and the optimization steps of a new propeller to use at high altitudes are also described
The results of propellers designed with JBLADE are then analyzed and compared with conventional CFD results, since there is no experimental data for these particular geometries
Can two different propellers be used on Maat high altitude Cruiser airship?
This paper reports the work conducted to design and analyze two different propellers for application on MAAT high altitude cruiser airship
The propellers were designed to propel the cruiser at a steady-level flight of 16 000 m above sea level
A convenient airfoil was selected and a new airfoil was developed
What is a propeller operating design point?
Propeller geometry A propeller operating design point consists of the airship's velocity, the thrust that the propeller needs to produce, the propeller hub and tip radius, the position of each intermediate section and the air properties at the desired altitude
The commercially available unmanned aerial vehicles are not good enough for search and rescue flight at high altitudes
High altitude propeller design and analysis
Two-propeller design for improving low-airspeed maneuverability
Aircraft equipped with contra-rotating propellers, also referred to as CRP, coaxial contra-rotating propellers, or high-speed propellers, apply the maximum power of usually a single piston or turboprop engine to drive a pair of coaxial propellers in contra-rotation. Two propellers are arranged one behind the other, and power is transferred from the engine via a planetary gear or spur gear transmission. Contra-rotating propellers are also known as counter-rotating propellers, although the term counter-rotating propellers is much more widely used when referring to airscrews on separate non-coaxial shafts turning in opposite directions.
A high-altitude platform station or atmospheric satellite is a
Aircraft that provides common satellite services
A high-altitude platform station or atmospheric satellite is a long endurance, high altitude aircraft able to offer observation or communication services similarly to artificial satellites. Mostly unmanned aerial vehicles (UAVs), they remain aloft through atmospheric lift, either aerodynamic like airplanes, or aerostatic like airships or balloons.
High-altitude long endurance (HALE) military drones can fly above 60,000 ft over 32 hours, while civil HAPS are radio stations at an altitude of 20 to 50 km above waypoints, for weeks.
