However, the Owners Manual for the 1974 and later PA-18 Super Cubs does state this in SECTION VI, page 43 of that manual: Control Cable tension should be adjusted as follows: Copyright 2021 Univair Aircraft Corporation. Make sure that the tensiometer is. The tension is checked when there is no load on the controls and in the middle of the longest stretch of cable between pulley. It is checked using a tensiometer and adjusted using the turnbuckles. If you are concerned, I would suggest using the lower setting for the temperature that day. For year most mechanics were able to figure out appropriate cable tensioning based on experience. All rights reserved. **Not to be used as an alternative for Approved Maintenance Data.**. Does cold winter operations pose problems to control cables? A blocking mechanism prevents the two halves from moving relative to each other when the pilot. However, there are still several dc generato Integral fuel tanks are formed within the aircraft structure by sealing compartments like wing sections during manufacture. Should cold temperatures contract metal cables and increase the tension in winter? The cable is slipped between the riser and the two anvils. . The reading on the scale is then applied to a chart to obtain the cable tension. My current aileron cable tension is 30 lbs. Zoning of large aircraft is specified by the Air Transport Association of America in the ATA-100 Specification . ! American Bonanza Society3595 N. Webb Road Suite 200Wichita, KS 67226316.945.1700 |info@bonanza.org. Aircraft Maintenance Engineering-Mechanical, Air Transport Association 100 Chapter System (ATA100). , , - , : , Squid Game , . K). , , () / () . . Note: Only a member of this blog may post a comment. The tensiometer must have the riser installed that is specified for the cable size being checked. Aluminum has approximately 2X the thermal coefficient of expansion as steel. A pointer lock can be used to hold the instrument reading while it is being removed from the cable. The correct tension for a control cable is specified in the Aircraft Maintenance Manual. , (), . Kindly Do Not Copy without consent of the owner of this blog. The lever is then closed against the housing. () . The correct tension for a control cable is specified in the Aircraft Maintenance Manual. After spending 12 hours at -60 C at cruise altitude, the fuel in the wing is very cold and only the lower wing skin is exposed to it. It is usual for a temperature/tension graph to be given by the aircraft manufacturer. A 747 is 70 m long, temperature differences of 90 C can be reached, so the resulting stretch is 15 cm. Currently the temperature is around 70F so my mechanic will already have to compensate for temp (40 lbs is for 59F). During flight, the elevators & tail plane put up/down loads on the fuselage as well, bending it up/downwards. Here in northern Canada the temps are pretty low in winter (often less than 0F). . Before using the tensiometer make sure that the serial number of the chart is the same as that of the tensiometer. All of the older models of Piper aircraft were built and maintained without any published cable tensioning specification. Controls are lighter and more enjoyable and cable and pulley wear are lower Steve. My mechanic find the required tension of 40 lbs as stated in the Maintenance Manual quite high (see picture of recommended tension). Making statements based on opinion; back them up with references or personal experience. This has been required to help assure proper rigging and to prevent cables jumping pulleys or prematurely wearing them out. Doing my 1981 A36 Bonanza annual (serial E-1788). The piston of a reciprocating engine is a cylindrical member which moves back and forth within a steel cylinder. I personally like cable tension on the low end. In colder countries the required load will be lesser as compared to the hotter countries, this is mainly due to temperature effect on materials which causes it to expand or contract. There are actually charts in aircraft maintenance documentation showing the effect of temperature on cable tension. Content of this blog should only be used for Knowledge, training & educational needs. Current produced aircraft must have published cable tension specifications. Springs pull them towards each other when no load is applied, when the pilot does not apply a force to the stick. (), . The following are the types of fluid commonly used in aircraft operating today, some of them remain i Aircraft dc generators have for the most part been replaced by alternators on modern aircraft. Steel cables stretch half that amount, and the total cable run is differs 7 cm from the temperature alone. The piston acts as a movi Nacelles or pods are streamlined enclosures used on multi-engine aircraft primarily to house the engines. , . ( ) , . Ailerons bend the wings more or less. ! Although he will follow the Maintenance Manual and increase tension to 40 lbs (using the latest 2017 version), he would like the advice of American Bonanza Society specialist. () , : : : , : : . : : : , : , , () . Any suggestions? Steve is correct, at 59 F you have a range of 35 - 40 lbs tension on the aileron cable per the chart. The purpose of this component is to change the reciprocating motion(up and down movement) of the piston into rotary motion. Taylorcraft Model A Series, B Series, F-19, F-21, F-21A, SAFO 10018 Powder Coating of Sealed Lift Struts, Special Airworthiness Information Bulletins, SB-485 Piper PA-18 Rerouting of Rudder Control Cables, SB-181 Piper Replacement of Flexible Stainless Steel Control Cables, SB-182 Piper Control Cable Replacement on Foreign Registered Airplanes. Using the graph, the correct tension can be applied to the cable. Although my airplane is hangared, it still gets pretty cold and my mechanic is afraid that the cable tension would be problematic at low temps. , *** - , : , . [ , . , , , , , , , ! , : , . During turbulence, the wings flap up and down. Download PDF: Piper-Control-Cable-Tensions.pdf. Asking for help, clarification, or responding to other answers. Changes in temperature will affect the tension of the cables and this must be taken into account when adjusting the cable tension. The purpose of torque loading is to make sure the correct and efficient clamping together of two surfaces. The "wheel" is not a multi-rotation unit, but two cable quadrants that deflect about 40 degrees each total. The upper wing skin is exposed to the sun, and upon approach gets warmed up more and more: upper skin stretches because of the heat, and the wing tip comes down by a surprising distance.
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