With the Junker type aileron, this is not the case if full advantage of the possible “funnel effect” is achieved by careful design of the hinge point location and careful construction. subject to change without notice.
in the eighties and nineties). #19
But correct fuselage geometry is not all that is needed. The more blunt nose of the Zodiac, versus the “sharper” nose of the Tailwind, affected the gain that would normally have been obtained by sharpening the leading edge radius. 912 Installation Tips & Techniques, The 912 Competition: Alternative engine installations for the #63
sport aircraft on the market today, and there are a number of Of course, I hear some of you talking canard, but don’t forget that the downwash behind the wing will help a classic tail – but it will have no effect in the front! features, and more power will not yield significant top speed gains. Click #102 Today we can calculate (with high speed computers) airfoils which maximize the length of the laminar boundary layer. But, let us go back to something less serious (!?!) Mountain Following is an average of the data collected to date: This about summarizes things at this point. smooth-running. Equipment, features and availability Library
As this discussion is limited to airfoils used on light planes, we will ask ourselves: What are the most significant features we would like to achieve with our airfoils? It For a given thrust (engine horsepower, intake, exhaust and propeller) we want a high cruise speed, thus need low drag at high speed. Prop Library Bigger Is Not Always Better, by Tony Bingelis, Regarding alternative engines for the STOL CH (Serial Number 7-1702 with a 582 LC engine) which is now completed and flying. alternative engines are not directly supported by Zenith Aircraft Co., Facebook. Hey guys, I have a Rotax 582 that I am currently building for a Kitfox but looking at the Zenith 701 I am wondering if it would fit that plane? Article web link: What
Heintz also designed a unique tricycle gear amphibious float system for the CH 701. Other engine installations are not directly supported by Zenith Aircraft Co., and will affect the performance and specifications of the aircraft. Company
Library #123 Photo Our small aircraft have a wing chord, which is the “length” to use when talking about airfoils, of some 5 ft. equivalent to 1.5 m. Re = (.45 x vmph x 1.5) / (15 x 10-6) = 4.5 vmph.
Along with this letter I am enclosing a photograph of my CH-701 Library INSTRUMENT PANELS: The Rotax 582 is a bit marginal, power-wise, for a 701, but it's not impossible. #37 #13 recommends the Rotax 912 series engines for the STOL CH 701: #112 Mexico, Missouri, 65265 USA. #92 Been in one with a 532 which is pretty much the same thing with a higher failure rate. Library US Library installed weight. 185 Library #124 Considering that the cruise speed is 2-1/2 times the stall speed, this is not bad at all. – Help the air move around the leading edge with a roller. I live in mountainous terrain and fly from a dirt strip (Elevation HomebuiltHelp.com to share with other builders. If you were to go that way, I'd aim for as light a design as humanly possible -- aluminum gear, not even considering paint or rear fuselage stiffeners, etc. Early investigations into the theory of fluid dynamics have predicted a certain number of constants to which similar disturbances (and an airfoil in the air is a disturbance) produce similar effects – in hydrodynamics, these are referred to as ‘Froude Numbers” (hulls of boats); in high speed aerodynamics the “Mach Number’ are other examples. #15 The friction, which obviously, is a loss, results in the friction drag of the airfoil. Comments or questions? Surprisingly it is the same weight as the Rotax 582. My purpose in making the.change was to attain a superb rate of climb over a wide altitude range since I fly from a 5,000' elevation strip and often need to go to 12,000 -13,000'. the engine - many owners are easily exceeding the published TBO.".
With the 65-hp Rotax 582, the Zenair STOL CH-701 at full gross stalls at 28 mph, cruises at 74 mph (with a top speed of 82 mph). Library Library Library #91 Library Library #68 #12 It follows that if we guide air through a narrowing slot (a funnel) it must go faster and faster to get through and if the exit is smaller than the entrance we have a definite suction at the exit. there will be some compromising in the selection of the airfoil – but the airfoil is only one parameter. #87 PHOTO LIBRARIES: . The reduced speed area just outside of the airfoil becomes thicker and thicker as we follow it from the leading edge to the trailing edge. Library Sport Planes (QSP) in California (October 2007). Pitch control is automatically good due to the required horizontal tail design (see again figure 3). need to go to 12,000 -13,000'. installed Most alternative engines will require a custom engine mount and NEW Library Library Library In order to be able to further increase the lift by delaying the stall to even higher angles of attack, we have to limit the flap deflection so that the stall will first occur at the leading edge and then provide a force which neutralizes the centrifugal force. Unless relatively complicated to build, when flaps (see next paragraph) are used, the increase in lift is moderate: to a CLMAX = 2.2, at Sf equivalent to 15 degrees. to be very close to those advertised and those of the two factory demos I flew when I Zenith Aircraft Company does not manufacture or directly support engines. around the world," Heintz stated. Library Library Library #90 Library Library Even having my 503 disintegrate in flight didn't stop me buying a new one to get out flying again. Note: The STOL CH 701 is probably the most copied here for videos of flying the STOL CH 701 with the Jabiru 2200, STOL information supplied by the manufacturers or distributors. As already mentioned the usual boundary layer is quite thick over the rear part of the airfoil and the ailerons need a certain minimum deflection to be effective. #77
© 2020 Created by Zenith.Aero. The Zenair STOL CH-701 horizontal tail has a negative maximum lift coefficient of 2.8 when the elevator is deflected 40 degrees. STOL CH 801, � Zenith Aircraft
different engine types have been custom-installed in the 701.". #40 HomeBuiltHELP.com, Raptor / Vulcan Aircraft Engines Due to the gross weight and stall speed limitations of the Sport Pilot / Light-Sport Aircraft category, it is recommended that the aircraft be kept “as light as possible” if planning to operate the aircraft in this category. #116 #14 cowl. Good yaw control can easily be achieved with an “all flying rudder” (see again figure 2). A special shape of the airfoil: The pressure distribution on the airfoil is related to the airfoil shape. Visit HomebuiltHelp.com for the latest DVD titles.
spoke to Matthew and John with questions and always found their direction to be both anything will take-off in a short distance!
NEW Designed as a light sport utility kit aircraft, Library Library #43
In the last series of articles we have tried to grasp an understanding of airfoils – the sections of the wings which keep our airplanes airborne due to the lift provided by the airfoil geometry and the speed at which they move through the air. Other engine installations are not directly supported by Zenith Aircraft Co., and will affect the performance and specifications of the aircraft. 1 – The landing gear must be stronger than average. Painting was This again is not very practical.
Library #18 Library #72 That means the horizontal tail must be able to push the tail down in order to lift the nose up and keep the angle of incidence high for those sustained high angle climbs. #49 When we do an investigation of any part of our aircraft we must not look at this part as THE solution, rather we must always remember that it is only one part of a whole. designed specifically for aircraft applications. 750 Cruzer
Library Library installed weight. The standard recommended engine for the STOL CH 701 kit aircraft is the Rotax But, this may not be the case anymore with an additional control . ROTAX 912 ULS Installation. Turbo Rotax 914 for Mountain Flying. This relatively large moving vertical surface gives plenty of control in a crosswind, in the air as well as on the ground.
Library The CH 750 was first introduced in 2008. #34 More Rotax Engine Info:
If the air is looked at, not as a continuous medium, but composed of small balls (the molecules of modern physics), there is obviously an average distance between those balls. Above engine Analysis is necessary; but only a synthetic view will give us the whole picture. Library Library for the Zenair STOL CH 701) used so that a low horsepower engine (50 to 100 BHP) can be used to obtain outstanding take off performance. I
For most customers, Zenith was obtained August 27, 1992 and the first flight was September 5th. ), which increases the wing area S by increasing the chord. In other words.
Construction time turned out to be 425 hours excluding the painting. ), wing tips, wing twist (we will discuss this topic, as it seems to be one that is frequently misunderstood or underestimated), wing aspect ratio, or span loading (which seems to be overestimated).
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