Stevo Posted July 4, 2015 Share Posted July 4, 2015 Thanks to popular demand and peer pressure (?) it's the green light So what's going to follow? I'll try and get as much detail in here as I can, and discuss any problems and issues. You will get to follow me from initial conception to completion and anything in between. Plans & drawings I have a set of borrowed plans from Percy V, which are for the smaller size. Percy has also lent me the original sketches of the +20% version as well. I'll bet these copied early next week at a local printing firm and return the originals. Options and detail Well it's hardly a detailed warbird with a million rivets, so I'll enhance it in other ways. Wing LEDs - Braincube will supply the tip LEDs, green & red for this; switched from the Tx Servo per aileron - The wing is quite deep, and there looks plenty of room to bury the servo in there completely. Therefore all you will see is the pushrod exiting from the fuselage Closed loop - on both elevators and rudder. Probably a servo on each elevator half. The idea is for the control wires to be seen as on a full size, within reason. Power Plant (Robert's brother). Saito 100 Undercart - not thought this one through yet. I like the 'Turbulent' style and not the fuselage mounted sort. Suggestions welcome. So no photos yet, stay tuned. Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 4, 2015 Share Posted July 4, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
IanR Posted July 4, 2015 Share Posted July 4, 2015 Good lad, Stevo. Also looking in. Thanks. Ian Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 4, 2015 Author Share Posted July 4, 2015 Lets see if I can get the incidence right Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 4, 2015 Share Posted July 4, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 5, 2015 Author Share Posted July 5, 2015 An idea of the costs so far... S/H Saito 100 = £125 Copying of plans = £22 (2 x A1 and 1 x 840mm x 2m) All timber (Ply, LitePly and Balsa) from Balsa Cabin = £77 + postage I've got quite a selection of balsa stock anyway, so hopefully I can make up any shortfall. Obviously needed are: - Covering & Decals Servos Radio Rx & leads Wheels Dural U/C (If I don't go the Turbulent undercart route) Hardware (Closed loop clevises, horns etc) Windshield That's enough for now! Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 5, 2015 Share Posted July 5, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 5, 2015 Author Share Posted July 5, 2015 The thoughts on the U/C are to get one from Carbon copy, laminate my own, or really go for it and make one based upon a Druine Turbulent. This would involve additional strength in the wings and centre section, with beech block bearers for the U/C. I've got plans of a Turbulent including its U/C so I've got a base to work from, i.e. where to place the wheels in front of the CoG etc. I've made the odd windshield from acetate "framed" in litho plate with rivets stamped in.... What scale pilot? Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 5, 2015 Share Posted July 5, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 9, 2015 Author Share Posted July 9, 2015 The wood arrived today, free postage from Balsa Cabin, nice one I can't start this for a week or so, while I clear the decks!!! Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 9, 2015 Share Posted July 9, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Andy Shailer Posted July 9, 2015 Share Posted July 9, 2015 Will be following your build Stevo as I have the plans in my "must build one day" box!! Andy Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 9, 2015 Share Posted July 9, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 11, 2015 Author Share Posted July 11, 2015 Here's my idea. Obviously that's a Turbulent, no prizes there. The UC for the Tigre will be of piano wire construction, with a heavily reinforced centre section, with Beech bearers as is standard practice. Developing an idea from Mr. Hooper, the main 'spring' in the UC will come from the piano wire construction. I'll probably use some HK type oleos up into the wing, again reinforced, with a very light spring installed, probably not so much for tensioning the undercarraige but for a 'scale' appearance. I'll try and aim to get the UC as far forwards as I can, without some heavy rake angle. I think inevitably the wheels will be further back than the original plan and the fuselage mounted version. I have to admit that the twin looks great Edited By Stevo on 11/07/2015 11:18:26 Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 11, 2015 Author Share Posted July 11, 2015 Oleos found: - On the plan I measue 140 from axle centre to underside of wing. These may need a little fettling to work properly, but an upside to all this extra work is that the wheels will be further apart - if you have ever witnessed my landings you will understand that this is a bonus ! If there are any 1/4 scale buffs around - what size piano wire? for the main I'm guessing 8 gauge (4mm) for the main and 10 Gauge (3.2mm) for the training link? Coupled with a small degree of spring from the above oleo I guess this will be enough? Scaling a Turbulent from some internet drawings gives me a wheelbase of approx 1.3m, so the Tigre is roughly 1/4 or perhaps 1/3 scale, so a ball park figure for my newly designed wheelbase comes in at 320 -400mm, so plenty wide enough. Edited By Stevo on 11/07/2015 12:06:41 Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 11, 2015 Share Posted July 11, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 14, 2015 Author Share Posted July 14, 2015 Lots of measuring, scaling up done today. Here's the rib template, that takes into account the increased size spars, dummy L.E., plus 1/4 x 3/8" reinforcement on the L.E.. The above is the rib outline, so is encased in rib capping, and other 1/16" sheeting where appropriate. Assembly order is Ribs, spars, reinforcing thne dummy LE. Then sheet and rib capping, and lastly L.E. Edited By Stevo on 14/07/2015 18:27:31 Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 14, 2015 Share Posted July 14, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 15, 2015 Author Share Posted July 15, 2015 The single leading edge spar should be 1/4 x 1/4" ! I've factored in the Webs too. Hopefully Ill clear the workshop this weekend ready, although my spine may have other ideas. Permagrit tools ordered today as well. Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 16, 2015 Author Share Posted July 16, 2015 Damn the old back ache... Tidied up as much as I can ready for work to commence... And the timber from Balsa Cabin Edited By Stevo on 16/07/2015 18:24:27 Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 16, 2015 Share Posted July 16, 2015 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
IanR Posted July 16, 2015 Share Posted July 16, 2015 Nice workshop, Stevo. Hope your back doesn't play up too much. Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 18, 2015 Author Share Posted July 18, 2015 Uh huh.... gluing away like crazy. Fuselage halves from 1/4" Balsa with 0.5mm ply doublers. You never can have too many clamps. All surfaces degreased and glued with Aliphatic. Quote Link to comment Share on other sites More sharing options...
Andrew Price 2 Posted July 18, 2015 Share Posted July 18, 2015 You'll be in trouble when the missus sees what you're using her bookshelves for!! Quote Link to comment Share on other sites More sharing options...
Stevo Posted July 18, 2015 Author Share Posted July 18, 2015 That's my old garage shelves OK, fuselage sides laminated and sized up. The wing seating is approximate - when I come to assemble the model I'll use an incidence gauge (as recommended by IanR ). Now I know why people use CA... faster drying and the joint don't have to be that tight. So I impose upon the project Aliphatic and close joints, of course... No turning back now!What ever have you done Percy V.? Looked at the bulkheads, loads of room for SLEC orange lower down to keep the carb line in line with the tank! Edited By Stevo on 18/07/2015 15:46:30 Edited By Stevo on 18/07/2015 15:48:47 Quote Link to comment Share on other sites More sharing options...
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