Original Posted By: "Wayne McIntosh"
during a search of the archives I came across a few posts with some of youguys talking about the extruded aluminum lift stuts offered by SkytekAircraft www.sky-tek.comTo those who have used them in leiu of 4130 streamlined tube.... how didyou terminate the ends? I would assume you could just stick a length of4130 square tube up into the strut and have it extend out a bit past thestrut, but is there a more streamlined, cleaner looking method??I sure like the idea of using the aluminum ones... cost, weight, etc..DJ VeghMesa, AZGN-1 Builderwww.raptoronline.comN74DV________________________________________________________________________________
Pietenpol-List: lift struts - aluminum
RE: Pietenpol-List: lift struts - aluminum
Original Posted By: owner-pietenpol-list-server(at)matronics.com
Unless the aluminum strut extrusion has flat parallel surfaces on the insideof the tube (some of the newer extrusion for the seaplane crowd featurethis), then it is better to use round 4130 stock, either solid bar orthickwall tubing, for terminating the ends. This latter case would be wherethe inside radius of the streamline tubing would be greater than the outsideradius of the 4130 piece so that no deformation of the tube would occur asyou tighten down the bolts. If you deform the streamline, you willeventually have a crack there. Ideally, the washer under the head of thebolts and nuts would be flat on one side (for the bolt or nut to bearagainst) and the other side of the washer would be concave to match theradius of the outside of the streamline tube.Does this make any sense?Some members in the Cub Club may recall a few years back that someone had anSTC for repair of the lower ends of cub struts using this method. GoodVentilation.Chris Bobka-----Original Message-----
Unless the aluminum strut extrusion has flat parallel surfaces on the insideof the tube (some of the newer extrusion for the seaplane crowd featurethis), then it is better to use round 4130 stock, either solid bar orthickwall tubing, for terminating the ends. This latter case would be wherethe inside radius of the streamline tubing would be greater than the outsideradius of the 4130 piece so that no deformation of the tube would occur asyou tighten down the bolts. If you deform the streamline, you willeventually have a crack there. Ideally, the washer under the head of thebolts and nuts would be flat on one side (for the bolt or nut to bearagainst) and the other side of the washer would be concave to match theradius of the outside of the streamline tube.Does this make any sense?Some members in the Cub Club may recall a few years back that someone had anSTC for repair of the lower ends of cub struts using this method. GoodVentilation.Chris Bobka-----Original Message-----
Re: Pietenpol-List: How To Booklets
Original Posted By: "Fisherman Caye"
Ray, Found the catalog. Here is what I can find that might be what you had yearsago. To order call 1-800-843-3612. Custom Aircraft Design Volumes 1, 2, 3 F-37153 $40.00 (Thisis for all 3)Building Your Own Airplane: Welding/EAA Welding Manual Combo F-36688 $ 23.99 This is a manual and 50 minute video tape. They sell each separately.Custom Built Sport Aircraft Handbook F-13510 $14.95 Dope and Fabric F-37139 $12.00 Photocopy of an EAA book no longer inprintStandard Aircraft Handbook F-37077 $24.95 Illustrated reference guide torivets, fasteners, nuts, and other hardware.Aircraft Fabric Covering F37123 $12.95 Review of material available, tapes,cord and thread, dopes, tools, etc.A whole bunch more. Look at the weight and balance book, too, but I didn'tsee one for a handbook with "65" in it. Call them and ask for the EAA AviationBooks & Videos catalog.Kent----- Original Message -----
Ray, Found the catalog. Here is what I can find that might be what you had yearsago. To order call 1-800-843-3612. Custom Aircraft Design Volumes 1, 2, 3 F-37153 $40.00 (Thisis for all 3)Building Your Own Airplane: Welding/EAA Welding Manual Combo F-36688 $ 23.99 This is a manual and 50 minute video tape. They sell each separately.Custom Built Sport Aircraft Handbook F-13510 $14.95 Dope and Fabric F-37139 $12.00 Photocopy of an EAA book no longer inprintStandard Aircraft Handbook F-37077 $24.95 Illustrated reference guide torivets, fasteners, nuts, and other hardware.Aircraft Fabric Covering F37123 $12.95 Review of material available, tapes,cord and thread, dopes, tools, etc.A whole bunch more. Look at the weight and balance book, too, but I didn'tsee one for a handbook with "65" in it. Call them and ask for the EAA AviationBooks & Videos catalog.Kent----- Original Message -----
RE: Pietenpol-List: lift struts - aluminum
Original Posted By: owner-pietenpol-list-server(at)matronics.com
the struts from Skytek DO in fact have parrallel flats on the inside spacedat 1.006 for the front struts and .756 for the rear. so a 1" and .75" couldbe used respectively. I was just curious because the GN-1 plans show the4130 streamlined tubing being tapered to the fitting making a clean lookingend. I guess of you go aluminum you dont get that fancy with it.DJ-----Original Message-----
the struts from Skytek DO in fact have parrallel flats on the inside spacedat 1.006 for the front struts and .756 for the rear. so a 1" and .75" couldbe used respectively. I was just curious because the GN-1 plans show the4130 streamlined tubing being tapered to the fitting making a clean lookingend. I guess of you go aluminum you dont get that fancy with it.DJ-----Original Message-----
RE: Pietenpol-List: lift struts - aluminum
Original Posted By: "Richard L. Dery"
Re: Pietenpol-List: lift struts - aluminum
Original Posted By: "DJ Vegh"
RE: Aluminum Struts:Skytek is really Carlson Aircraft of East Palestine OH; they market severalkits/components for planes designed by the late Mr. Carlson, who was aformer Piper engineer.I bought and have installed their aluminum struts for my lift and cabanestruts. I asked Carlson to send me the specs on their struts and thedrawings showing the strut end attachments. As was noted there are twosizes of struts; I used the larger which has a major axis of 3 1/8" and aminor axis of 1 1/4" the interior of the strut has flats which snugly fit a1" square bar. and thats what the drawings showed for the end attachmentsI also bought some 1" bar from them and used a 4 1/2" piece for each endfitting. I rounded the exposed end and drilled for the attaching bolt.Used this design for both cabane ends and for the top end of the liftstruts. For the lower end made the same end and slotted it to mate withthe attachment lug. Tied the bar to the strut with 3 #10 SS boltsthrough the strut and bar stock. The flats are 1/8" thick at the centerwhere the bolts are and are plenty stout. The wing loading for theCarlson planes was well over 9 lbs/sq ft so the strength should be adequatesince they use one of each size for their application.I liked the idea of getting a streamlined metal strut for a reasonableprice; I paid $41.50 for each 10.5' length 2 years ago. Struts are 6061T-6.Lou Larsen----- Original Message -----
RE: Aluminum Struts:Skytek is really Carlson Aircraft of East Palestine OH; they market severalkits/components for planes designed by the late Mr. Carlson, who was aformer Piper engineer.I bought and have installed their aluminum struts for my lift and cabanestruts. I asked Carlson to send me the specs on their struts and thedrawings showing the strut end attachments. As was noted there are twosizes of struts; I used the larger which has a major axis of 3 1/8" and aminor axis of 1 1/4" the interior of the strut has flats which snugly fit a1" square bar. and thats what the drawings showed for the end attachmentsI also bought some 1" bar from them and used a 4 1/2" piece for each endfitting. I rounded the exposed end and drilled for the attaching bolt.Used this design for both cabane ends and for the top end of the liftstruts. For the lower end made the same end and slotted it to mate withthe attachment lug. Tied the bar to the strut with 3 #10 SS boltsthrough the strut and bar stock. The flats are 1/8" thick at the centerwhere the bolts are and are plenty stout. The wing loading for theCarlson planes was well over 9 lbs/sq ft so the strength should be adequatesince they use one of each size for their application.I liked the idea of getting a streamlined metal strut for a reasonableprice; I paid $41.50 for each 10.5' length 2 years ago. Struts are 6061T-6.Lou Larsen----- Original Message -----
Re: Pietenpol-List: lift struts - aluminum
Original Posted By: "Warren D. Shoun"