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Tools for the Workshop

Tools for the Workshop A Monthly Selection of Recent Equipment and New Methods Brown Tractors Limited, Meltham, near Hud- A New Aircraft Tractor dersfield. The tractor shown in FIG. 1 is one of the latest of those manufactured by David Brown to be Two Fairey Tools made available to civilian users. I t has a 2,523 c.c. four-cylinder engine with the following output: During the war the Fairey Aviation Co. of 25 b.h.p. at 1,200 r.p.m. and 38·5 b.h.p. at a Hayes, Middlesex developed a number of useful governor-controlled maximum speed of 2,200 tools, most of which are now available to the r.p.m. A four-speed, and reverse, gearbox is trade. Two small tools which overcome two problems of long standing are their precision fitted. The turning circle of the tractor has a tube sizer and recessing tool. diameter of 28 ft. and the rear wheels are fitted with 16 in. diameter Girling brakes operated in­ The tube sizer is a lathe fitting which is used to dependently by hand or foot. make up for the discrepancies in tube bores, so that standard plug-ends can be used. It has the There is a three-depth self-digging sprag for marked advantage that the tube is eased out to use in conjunction with the winch, which has the size and no metal is removed from it. As can be following performance: rope 2 in. by 100 ft.; drum speed 24 r.p.m. at max. pull; rope speed seen from the illustration (FIG. 2) full lubrication is provided, so that damage to the walls cannot 49 ft./min. at 24 r.p.m. and a pull of 10,000 lb. take place. The tool is available for all sizes of Either a four-position towing hitch or an Air aircraft and tubing from ¾ in. I.D. upward. Ministry spring-mounted towing hook with a 2 in. dia. eye can be fitted. The tractor's per­ The action and results of the recessing tool for formance can be gathered from the following blind holes are clearly shown in the drawings table of data. which form no . 3. The tool consists of a shank which ends in a cutting head C and, in the core, an adjustable stop A and a ball-ended taper pin P. Road Speed (m.p.h.) When the tool is inserted in a hole the ball-end Drawbar pull Gear (lb.) tyre ad­ B bottoms and then presses the taper pin into the 1,200 r.p.m. 2,200 r.p.m. hesion assumed (max. torque) (max, speed) shank, so spreading the cutting head. Adjustment 75 per cent. of the tool is made by the screws and nut N; 1st .. .. 1·26 2·31 5,400 the position of the recess depending upon the 2nd .. .. 1·84 3·38 3,100 depth of the hole, and the diameter of the re­ 3rd .. .. 3·86 7·10 2,100 4th .. .. 7·94 14·54 1,070 cess upon the position of the stop A—the shape Reverse .. 0·83 1·52 4,500 of the recess is, of course, dependent upon the grinding of the cutting head. Examples of a variety of recesses are shown in FIG. 4. Full particulars can be obtained from David B.S. SPECIFICATION Copies of the following Specification may be obtained, at the price indicated, from the British Standards Institution, 28 Victoria Street, London, S.W.I . B.S. Handbook No. 4. British Standards for Lifting Tackle. During the past two decades, responsible com­ mittees of the British Standards Institution have formulated a series of standards for lifting tackle. It is not claimed that, even now, these standards are either exhaustive or complete, but their num­ ber and importance justifies the collection and issue in a single volume of those which suspend, lift and lower a load and which are in common use in a large variety of appliances, where failure is liable to result in casualty. The Handbook is divided into seven sections— fibre rope, wire rope, terminal attachments for wire rope, chain, terminal attachments for chain, the materials cited in the preceding standards and a final section dealing with the statutory require­ ments under the Factories Act applicable to the contents of the Handbook. The first five sections contain the technical provisions of 21 published standards shorn of extraneous matter and repeti­ tion. The last section sets forth the rules, orders, registers and certificates current at the date of publication as legal obligations. Price 12s. 6d. February 1947 71 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Tools for the Workshop

Aircraft Engineering and Aerospace Technology , Volume 19 (2): 1 – Feb 1, 1947
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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb031477
Publisher site
See Article on Publisher Site

Abstract

A Monthly Selection of Recent Equipment and New Methods Brown Tractors Limited, Meltham, near Hud- A New Aircraft Tractor dersfield. The tractor shown in FIG. 1 is one of the latest of those manufactured by David Brown to be Two Fairey Tools made available to civilian users. I t has a 2,523 c.c. four-cylinder engine with the following output: During the war the Fairey Aviation Co. of 25 b.h.p. at 1,200 r.p.m. and 38·5 b.h.p. at a Hayes, Middlesex developed a number of useful governor-controlled maximum speed of 2,200 tools, most of which are now available to the r.p.m. A four-speed, and reverse, gearbox is trade. Two small tools which overcome two problems of long standing are their precision fitted. The turning circle of the tractor has a tube sizer and recessing tool. diameter of 28 ft. and the rear wheels are fitted with 16 in. diameter Girling brakes operated in­ The tube sizer is a lathe fitting which is used to dependently by hand or foot. make up for the discrepancies in tube bores, so that standard plug-ends can be used. It has the There is a three-depth self-digging sprag for marked advantage that the tube is eased out to use in conjunction with the winch, which has the size and no metal is removed from it. As can be following performance: rope 2 in. by 100 ft.; drum speed 24 r.p.m. at max. pull; rope speed seen from the illustration (FIG. 2) full lubrication is provided, so that damage to the walls cannot 49 ft./min. at 24 r.p.m. and a pull of 10,000 lb. take place. The tool is available for all sizes of Either a four-position towing hitch or an Air aircraft and tubing from ¾ in. I.D. upward. Ministry spring-mounted towing hook with a 2 in. dia. eye can be fitted. The tractor's per­ The action and results of the recessing tool for formance can be gathered from the following blind holes are clearly shown in the drawings table of data. which form no . 3. The tool consists of a shank which ends in a cutting head C and, in the core, an adjustable stop A and a ball-ended taper pin P. Road Speed (m.p.h.) When the tool is inserted in a hole the ball-end Drawbar pull Gear (lb.) tyre ad­ B bottoms and then presses the taper pin into the 1,200 r.p.m. 2,200 r.p.m. hesion assumed (max. torque) (max, speed) shank, so spreading the cutting head. Adjustment 75 per cent. of the tool is made by the screws and nut N; 1st .. .. 1·26 2·31 5,400 the position of the recess depending upon the 2nd .. .. 1·84 3·38 3,100 depth of the hole, and the diameter of the re­ 3rd .. .. 3·86 7·10 2,100 4th .. .. 7·94 14·54 1,070 cess upon the position of the stop A—the shape Reverse .. 0·83 1·52 4,500 of the recess is, of course, dependent upon the grinding of the cutting head. Examples of a variety of recesses are shown in FIG. 4. Full particulars can be obtained from David B.S. SPECIFICATION Copies of the following Specification may be obtained, at the price indicated, from the British Standards Institution, 28 Victoria Street, London, S.W.I . B.S. Handbook No. 4. British Standards for Lifting Tackle. During the past two decades, responsible com­ mittees of the British Standards Institution have formulated a series of standards for lifting tackle. It is not claimed that, even now, these standards are either exhaustive or complete, but their num­ ber and importance justifies the collection and issue in a single volume of those which suspend, lift and lower a load and which are in common use in a large variety of appliances, where failure is liable to result in casualty. The Handbook is divided into seven sections— fibre rope, wire rope, terminal attachments for wire rope, chain, terminal attachments for chain, the materials cited in the preceding standards and a final section dealing with the statutory require­ ments under the Factories Act applicable to the contents of the Handbook. The first five sections contain the technical provisions of 21 published standards shorn of extraneous matter and repeti­ tion. The last section sets forth the rules, orders, registers and certificates current at the date of publication as legal obligations. Price 12s. 6d. February 1947 71

Journal

Aircraft Engineering and Aerospace Technology – Emerald Publishing

Published: Feb 1, 1947

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