Jari's STOL CH 701 aircraft project

Almost all Jpeg-compressed pictures of these pages have 1152 x 864 pixel resolution, so every required details should be available.

By the way, I'm not pro in english language, so be patient by "translating" all these stories by yourself again :-)

Date (dd.mm.yyyy)
+ working hours

Pictures and stories

19.04.2001 0 h	I sent order of plans to Zenith Aircraft
26.04.2001 0 h	This was all, what I got by airmail from Zenair :-) Cost was 335 U$. There was this letter size binder, which included building instructions and some black & white detailed picture pages. There were also these CAD drawings of the plane (63 pages). All components were detailed quite perfectly. This is my garage, where I will build necessary lights, power outlets and working table in next weekend. This is my "wood hobbies room", what I will use to build all necessary jigs. As I'm electronic designer, I have my own "laboratory". There I will build strobos, servos for trim and flaperons, LCD screen for GPS-map, fuel meters, temperatures etc... This Hammond, what you see here, will be hopefully repaired before I need this room for aircraft components. Yes, I play keyboards in our local "jamming"-bar :-)
28.04.2001 2 h	There is a awfull weather outside and garage project will be pushed later. So, I decide to calculate materials for wings and create order for Lasercoat Oy, who will deliver all required aluminium for my plane.
30.04.2001 6h	Today I bought plywood for wing jigs. Required for bending jigs for ribs. Plywood size was 1550 x 1250 x 21mm. Cost was about 20 U$ First thing is to mark all "check points" to plywood. There is numerical table in drawings, which includes all necessary position information for curve points. This jig is for aluminium cutting. So, almost every size of jig needs to be expanded 17mm. Only nose curve has 3mm expansion. Curve ruler was too short for rear rib, so I used thin woodstick with little nails to get correct rib curve. Stoled from the flower-pot :-). Wing rib jig drawings finished. Right now we have few days holiday in here, in Finland and I will put this project for hold tomorrow. I need to go barbegue now. Bye!
01.05.2001 2h	At this point, tolerance is under 0.5 mm, and I don't use sand paper yet! Next I need to make 8 degrees obliques for bending jigs.
02.05.2001 4h	Finished paper works (construction licence application) for our local EAA. Under paper is more plywood for inner wing rib jigs.
06.05.2001 4h	Inner wing ribs. Fine tuning for left/right ribs. Right now, they are exactly same side and shape.
20.05.2001	I'm so sorry for delay of these pages! I really had so much to do with my apartment. Next (at beginning of june) I need to visit our neighbour country, Sweden. There is a cheapest place under 1000 miles to get 6061 etc. aluminium. Company name is Arigoteknik Ab, and it has own www-pages: http://www.arigoteknik.se
21.05.2001	"Anti collision" strobo system under construction. This control unit can drive simultaneously several strobo units. It has double-flash & single flash capability. Strobo tube unit under radio-noise and strobo tube voltage measuring This was GREAT test. Tube unit didn't create any radio interferences! Just a very little "snap" can heard, when tube unit was under 10 cm from receiver Strobo unit just before "cast plastic?", which is required for insulation of water and electric shortcuts. I will insert all necessary schematics to my www-pages, if you would like to build these kind of strobos by yourself. There will be available new www-page for schematics in couple days.
08.06.2001	YES! Building licence arrived. Thanks goes to our local experimental organisation, specially to Markku Hiedanpää and civil aviation administration. The plane will be placed to normal experimental category. So, I don't need to get ultra light-licence for it! I have PPL(A) already and it's more than enough.
13.08.2001	Ok, my summer holiday has gone :-( and I can continue with my plane project :-) I hope, that Arigoteknik can supply my aluminiums as soon as possible, because I didn't have enough time in summer holiday to visit there. So, they need to send them by cargo... I hope, they can collect ALL ordered materials at once, since they haven't 0.016" 6061-T6 sheets at July on their stock.... As you see, my carage has quite a lot of light power :-) 5 pieces 150W halogen and double tube fluorescent lights. Believe me, it's much easier work with good lights! You never have too much outlets! On each wall and even ceiling... There is all required plans for wings on the wall. I don't mess my papers with aluminium dust by my hands and I don't need to check details from binder all the time.
14.08.2001	GPS prototype works fine. Next thing to do; 16 bit processor and FLASH memory to save graphic maps...
16.09.2001	I have a little 2024-T3 aluminium for bending and riveting tests. So, I deside test bending first... Hey! This was EASY! No cracks and even tightest curve was easy to bend. It took only ten minutes to bend first test rib. Next I will bend all ribs..
Building wing ribs 26.10.2001 9h 27.10.2001 14h 28.10.2001 7h 29.10.2001 4h 30.10.2001 5h 31.10.2001 3h	Rear rib sheets. 12 pieces... Cutting these took about 5 hour with all testing. Just before bending... You need only a little hammer and piece of wood for this..... First rib without lightening holes... Primer... POP-rivets... Solid rivets... Now I have FREE www-space for all construction pictures without any banners! Thanks goes to Jussi Paju. MORE WING CONSTRUCTION PICTURES 29.10.2001: Okay, all wing ribs has been bended. Next thing is to create lightening holes and flang them with jigs maded by nylon. When all lightening holes are ready, I start to fix flanges with quite simple tools... (2 pieces 10mm diameter steel rods, soldered together...) Tolerance (shape) is 1mm right now and after fixing,... just gues... Rev-4 plans arrived... (Increasing maximum weight up to 1100 lbs)
Fuel tanks. 30.11.2001 1h 1.12.2001 2h 6.12.2001 3h 10.1.2001 3h	"Pre-work" for fuel tanks... FUEL TANK CONSTRUCTION PICTURES 10.01.2001: Fuel tanks was soldered today by Elektrometalli Oy. Very nice work indeed!
Wing spars 9.12.2001 4h 16.12.2001 4h 17.01.2002 3h 19.01.2002 2h 24.03.2002 5h 29.03.2002 4h 30.03.2002 3h 31.03.2002 5h	Today I cut wing spars... MORE WING CONSTRUCTION PICTURES 1.1.2002 Arigo Teknik has started delivering my parts... YES! Now I'm happy... 17.1.2002 Aluminium sheets... delivered by truck from Sweden. (Arigoteknik Ab) Aircraft factory :-) Too small carage... 24.03.2002: Great! Final shipment arrived on Friday from Arigo Teknik, from Sweden. 4130N chrome-molybden tubes, 6061-T6 tubes and 6061-T6 L-profiles... The rest of .016 sheets for fuselage...
Constructing rudder 20.01.2002 7h 23.01.2002 5h 27.01.2002 6h	MORE RUDDER CONSTRUCTION PICTURES
Constructing right wing skeleton 4.4.2002 6h 5.4.2002 7h 6.4.2002 6h 7.4.2002 5h 8.4.2002 4h 11.4.2002 3h 14.4.2002 3h 16.4.2002 5h 19.4.2002 5h
Constructing stabilizer 3.2.2002 2h 8.2.2002 5h 12.2.2002 5h 21.2.2002 3h 25.2.2002 1h	STABILIZER CONSTRUCTION PICTURES
	Weld 4130 N steel FAQ .
18.4.2002	Simple way to prevent "oil can" effect on wings (& fuselage). Take piece of .025 sheet and make L-stiffeners 17x17mm, flang them to correct shape and rivet them directly to the wing skin middle of ribs 2-3, 4-5 and 5-6 (top and bottom skins and same direction as rear ribs). Couple test pictures below. You don't need to rivet these to front and rear spars at all!
20.4.2002 2h 15.5.2002 8h 5.6.2002 6h 6.6.2002 6h 7.6.2002 4h 16.7.2002 5h 24.7.2002 5h 28.7.2002 4h 29.7.2002 4h 14.8.2002 3h 15.8.2002 3h	Installing right wing skins & fuel tank. 14-15.8.2002: Fighting with wing tip...
Rear fuselage 3.9.2002 2h 6.11.2002 2h 8.11.2002 3h 9.11.2002 4h 13.11.2002 2h 18.11.2002 2h 1-2.12.2002 3h 3.12.2002 4h 4.12.2002 2h 6.12.2002 4h 8-10.12.2002 10h 12.12.2002 4h 16.12.2002 1h	MORE PICTURES ABOUT REAR FUSELAGE
Total build time =271h
09:00 ??.??.2002 (-2003)	There is the aim!