Kyle Communications Posted April 23, 2023 Author Share Posted April 23, 2023 I have moved this thread from Other Aircraft into the now available RANS location in the forum 1 1 Link to comment Share on other sites More sharing options...
Kyle Communications Posted April 23, 2023 Author Share Posted April 23, 2023 Well its a big week this week. Work has finally started on my S-21 build. RodgerC who had a S-20 with the 141 wing and the round tail ( christened a RANS S-20.5) that came in the container I organised with mine and Greg's S-21 has finished his beautifully built aircraft and it has some 50 odd hours on it now. Rodger asked me if he could help me building my S-21 as I am still finally getting the the finish line with Mabel but still a bit away until I can clear my workshop out by getting Mable to the hangar for assembly. Of course I jumped at the chance to have such a craftsman help me put it together and of course he has already put together a set of 141 wings and they are the same series of itteration of back in 2019 so he knows all the traps in putting them together. This will help shorten my build time a lot seeing its been so long since the kit got here in Oct 2019 I got all the parts for the wings over to his place earlier this week and he has started prep already. I will be heading over there helping him when he needs it or I can get a chance to get over there and annoy him. As soon as Mabel vacates the workshop I will start on either the tailfeathers or fuselage..probably the fuselage I think. I will be away overseas for almost 2 weeks with my very understanding wife from Tuesday for some R&R to a mates wedding. We both need a break I should have Mabel down to the hangar a few weeks after that so can start the S-21 fuselage here. I am excited 🙂 A picture of Rodgers S-20.5 is here as well It is such a lovely built aircraft 8 Link to comment Share on other sites More sharing options...
Marty_d Posted April 23, 2023 Share Posted April 23, 2023 I like those extruded "D" leading edges and spars. Certainly beats hours with an air solid riveter and bucking bar putting L extrusions on the top and bottom of a 0.025" web. 1 Link to comment Share on other sites More sharing options...
Kyle Communications Posted April 23, 2023 Author Share Posted April 23, 2023 I love the whole wing/spar design on this aircraft. Apparently its from a old Luscombe design. The centre truss arrangement and front and rear spar just makes sense for ease of build and strength Link to comment Share on other sites More sharing options...
facthunter Posted April 24, 2023 Share Posted April 24, 2023 The spars themselves need local reinforcement where the strut attaches. BIG loads there. Nev Link to comment Share on other sites More sharing options...
Kyle Communications Posted May 23, 2023 Author Share Posted May 23, 2023 This thread will be a copy of the build log for this aircraft 23/4/23 Assembled both flap bell crank and one aileron bell crank assemblies. 1.4h 24/4/23 Riveted all (10) doublers to main and rear spars of LH and RH wing. Removed and replaced 9 rivets that were incorrectly packed in CCPQ-43 packet. (Were actually CCPQ-42….12 wrong size rivets in packet) Updrilled truss attachment holes in main spars to 5/16” and cleared excess powdercoat from bolt holes in wing trusses. 3.4h 25/4/23 Commenced match drilling strut truss fittings to LH and RH truss bosses. 1.3h 25/4/23 Continued match drilling and started reaming strut truss fittings on both trusses. 3.3h 26/4/23 Completed reaming strut truss fittings and bolted same to LH and RH trusses. Reamed spars, doublers and trusses. Bolted LH truss to LH wing main truss. 2.8h 1 Link to comment Share on other sites More sharing options...
Kyle Communications Posted May 23, 2023 Author Share Posted May 23, 2023 28/04/23 Squared flanges and straightened ribs of LH wing. Clecoed ribs temporarily to spars and shimmed truss to straighten rear spar. Fabricated wing attach angles for both wings and deburred. Deburred aileron and flap hinge brackets for both wings. 5.1h 30/04/23 Set-out aileron and flap hinge arms and rib attach angles. Removed ribs from spars and match drilled for hinge arms etc. Deburred all ribs and riveted hinge arms, flap and aileron bellcrank mounts and attach angles to ribs. Clecoed ribs to spars and positioned wing tie-down angle. 6.3h 1 1 Link to comment Share on other sites More sharing options...
Kyle Communications Posted May 23, 2023 Author Share Posted May 23, 2023 03/05/23 Riveted ribs 2-11 to front and rear spars. Installed LH wing flap and aileron bell cranks. 2.4h 06/05/23 Installed LH aileron bellcrank pushrod male rod end and aileron cable. Safety wired ferrule in locating slot. Installed LH flap Teleflex cable and safety wired to Teleflex cable mount. Attached male and female rod ends to flap bellcrank. 1.4h 08/05/23 Straightened (fluted) 11 ribs of RH wing. Drilled and deburred 5/8” holes in ribs of LH and RH wings. Added grommets to holes and cable draw string to LH wing ribs. 2.3h 13/05/23 Deburred ribs of RH wing. 1.9h 15/05/23 Routed and supported pitot and static lines in LH wing. Deburred 8 stringers for LH and RH wings. 5.4h 1 Link to comment Share on other sites More sharing options...
Kyle Communications Posted May 23, 2023 Author Share Posted May 23, 2023 23/05/23 Trimmed stringers to length. Levelled and squared wing spars on aluminium box sections. Formed rolled edge on upper LH wing skin. Clecoed wing skin to ribs and matched drilled main spar. Deburred and dimpled wing leading edge. 3.8h 5 1 Link to comment Share on other sites More sharing options...
Kyle Communications Posted May 24, 2023 Author Share Posted May 24, 2023 24/05/23 Countersunk (microstop) main spar to accept LH dimpled upper wing skin. 1.3h 4 2 Link to comment Share on other sites More sharing options...
Kyle Communications Posted May 27, 2023 Author Share Posted May 27, 2023 27/05/23 LE countersinking completed. Prep for anticorrosion paint for tops of ribs and front and rear spar contact areas 1 hr 5 Link to comment Share on other sites More sharing options...
facthunter Posted May 27, 2023 Share Posted May 27, 2023 Very neat. Nev Link to comment Share on other sites More sharing options...
Kyle Communications Posted May 27, 2023 Author Share Posted May 27, 2023 27/05/23 Assembled RH wing aileron bellcrank. 0.4h 1 Link to comment Share on other sites More sharing options...
Kyle Communications Posted May 29, 2023 Author Share Posted May 29, 2023 29/05/23 Removed upper LH wing skin and deburred leading edge spar. Roller applied two coats of corrosion inhibitor to spars, ribs, stringers and tank supports. Replaced wing skin and clecoed in tank supports. Riveted leading edge of skin to spar. 4.3h 5 Link to comment Share on other sites More sharing options...
Kyle Communications Posted June 2, 2023 Author Share Posted June 2, 2023 31/05/23 Riveted LH upper wing skin to ribs, fuel tank supports and stringers up to 4th last row. Match drilled upper flange of rear spar. Deburred rear spar and wing skin. 5.4h 4 Link to comment Share on other sites More sharing options...
Kyle Communications Posted June 2, 2023 Author Share Posted June 2, 2023 02/06/23 Trimmed, deburred and clecoed Flap and Aileron Gap Seals to Rear Spar. Riveted final four rows of LH Wing upper skin rivets to ribs. Riveted Gap seals to Rear Spar. Upper skin of LH Wing complete. 4.4h 4 Link to comment Share on other sites More sharing options...
IBob Posted June 2, 2023 Share Posted June 2, 2023 Looking really nice, Mark! 1 Link to comment Share on other sites More sharing options...
Mike Gearon Posted June 18, 2023 Share Posted June 18, 2023 Hey Mark. Great to see you’re underway. I haven’t been on this site in ages. I’ll update the other S21 thread. I’m in USA for now. Link to comment Share on other sites More sharing options...
Kyle Communications Posted June 26, 2023 Author Share Posted June 26, 2023 26/06/23 Trimmed stringer and notched around truss. Clecoed bottom skin to ribs and stringer. Drilled leading edge to front spar. Removed skin, deburred and dimpled. Microstop countersunk main spar and clecoed skin back to front spar, ribs and stringer. 4.6h 6 Link to comment Share on other sites More sharing options...
Kyle Communications Posted July 11, 2023 Author Share Posted July 11, 2023 11/07/23 Modified pitot mount bracket and riveted to rib #6. Marked-up and cut pitot mounting holes in lower LH wing skin. Vacuumed swarf from wing cavity. 2.1h 4 Link to comment Share on other sites More sharing options...
Kyle Communications Posted July 12, 2023 Author Share Posted July 12, 2023 12/07/23 Removed lower LH wing skin and deburred leading edge spar. Roller applied two coats of corrosion inhibitor to spars, ribs, stringers and tank supports. 2.9h 3 Link to comment Share on other sites More sharing options...
facthunter Posted July 12, 2023 Share Posted July 12, 2023 Looks pretty robust compared to most other comparable stuff. Nev Link to comment Share on other sites More sharing options...
Kyle Communications Posted July 12, 2023 Author Share Posted July 12, 2023 Yes Nev the S-21 is more like a GA aircraft in build. Mine will be in Group G 760kg category or if CASA get their sh*t together with their medical I may put it into VH Experimental. The limit at the moment is the S-21 with a Rotax 100hp is limited to 727kg MTOW but with a Titan or similar it is 820kg MTOW. So the airframe is limited by the manufacturer by horsepower. My Rotax is 114hp so my weight could come up a little to probably 750kg. The empty weight for most seems to be between 370kg and 400kg with a Rotax engine and about another 36kg heavier with the Titan 3 1 2 Link to comment Share on other sites More sharing options...
Kyle Communications Posted July 13, 2023 Author Share Posted July 13, 2023 Savannah builders will recognise the dreaded black goop. It is actually a fantastic product if applied correctly. Its not put on everywhere on this build as I havent put it on every mating surface. Only the surfaces that may have moisture ingress like the skins and rivets. I got a couple of tins from Aerokits just for this project 1 Link to comment Share on other sites More sharing options...
Kyle Communications Posted July 17, 2023 Author Share Posted July 17, 2023 17/07/23 Riveted lower LH wing skin to ribs. Match driller rear spar, deburred, vacuumed swarf from wing cavity and riveted skin to rear spar. 6.8h 5 1 Link to comment Share on other sites More sharing options...
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