C O N S T R U C T I O N   L O G 

A U G U S T     2 0 0 4

The goal (this is Stefan Wode's naked Classic in Germany)

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 1
 

Flattened tubes ends as per blue prints, but found they tend to crack at the hole. I don't think T6 is meant to be crushed in a vise. I will have to ask FFP if theyhave a new design, or come up with a new way myself, like bolting 1/8" plates to the side of the tubing.

The front brackets do not seem big enough to me . They are identical to all the other cabane brackets, which simplifies manufacturing, but if I notch the heavily doubled tubes to fit around the bolt ends, there won't be much material left around the hole. I will order a piece of 1" channel and lengthen the bracket so the hole can be moved down some.
  3 hrs

 2
 

Drilled 1/8" holes all the way around cockpit openings , 3/8 " from the edge, to lace the future leather trimmed padding.

Cut out luggage compartment door in bulkhead behind pilot seat, and made an aluminum door with aluminum piano hinge mounted with brass screws.

Varnished bulkhead, turtledeck, front seat, pedals, and rest of floor .

Experimented with swirl patterns on aluminum using a 1" sanding disk on the drill press. 120 grit seems to work best, with a staggered 5/8" grid.
  6 hrs

 3
 

Cut a piece of padouk to panel size and planed it down to 3/32", after attempting uncessfully to slice it in half . Drilled 3" holes to match 3 1/4" holes in plywood panel , added 2 1/8" holes and matching 2 1/4' holes in plywood .Mounted airspeed and vertical speed gauges with brass acorn nuts. Looks real good!

Sanded overlapping circles on luggage compartment aluminum door with 1" disk on drill press, sealed it with clear gloss lacquer, and installed with brass screws and copper washers. Looks real good!

Cut 3" wide strips out of olive green leather scraps to use around cockpit openings. Will have to mix 2 kinds to have enough.
Made two 24"x24" frames to stretch fabric on and test clear dope finishes.
  8 hrs

 4
 

Added missing blocks and ply gussets to top longeron at firewall. Gussetted tank support, added spacers in front.

Varnished the 2 frames.

Made new larger brackets for front of cabanes out of 1" channel.

Finished cabanes , took down the plywood jig and put them back up with 3/4" spacers between plates.

Installed turtledeck aluminum pieces, cut holes to get cabanes through.

Worked on cardboard pattern for front turtledeck. The holes for the cabanes have to be very oblong. Cut 2" hole for gas tank neck. Traced pattern on a sheet of .020 thick 6061T6 aluminum.

  8 hrs

 5
 

Cut out of .020 thick 6061T6 aluminum the front turtledeck cover. Light, but plenty stiff once bent around the curve.

Sanded and varnished frames a second time.

Cut , fit , and install firewall aluminum pieces .

Spackled and sanded elevator and stabilizer unit before second coat of varnish.

Cut tentative cardboard patters for winshields. I like the swept back look. A simple curved piece of plexiglass should do it , attached to the turtledeck with small angle brackets. Or better, a fitted copper piece all the way across the bottom of the windshiels. The bent in the plastic should keep it stiff enough.

  10 hrs

 6
 

Cut a padauk circle with a 2" hole to fit compass in aluminum bullet I had , re-enforced with 1/16" plywood , and mounted above panel on turtledeck in front of windshield with two long metal screws through 3/8"x 3/4" tubes. Padded interior with cotton to suspend compass and protect it from vibrations.

Stretched fabric on one of the frames after coating it with 2 coats of diluted Poly-Brush. Used Poly-Tak to attach the fabric , and pressed it down in the wet glue. Pulled it flat , but not tight. Messy, I need to get rubber gloves! I also need to get an iron and a thermometer to calibrate it.

Sanded and put a second coat of polyurethane on one side of stabilizer/elevator assembly.

Added 3/4"x2/4"brace to mount pilot throttle quadrant lower , more or less at elbow level, where it fits comfortably in the hand. The front quadrant will move down too, but not so low as to interfere with the rudder pedal.

Cut and bent a 3/4"x1/16" aluminum strip and brackets to attach bent plexiglas windshield.Cut out pattern out of an old piece of 1/8" plexi .

I may end up using a thinner and more scratch resistant polycarbonate . Will use a 1" strip of brass or copper in front of the plexi.

  8 hrs

 7
 

Made 5 small angled aluminum brackets to attach it to the turtledeck.Went by the tin shop to have neat 1" copper strips cut. Used a 1 " wide plexi strip as a spacer to drill the holes through the copper, the alu strip and the brackets, keeping everything nicely curving around the deck with a good slant. Installed windshield.

Added 1/4" spacer and 1/8"ply plate to bolt quadrants to. Installed quadrants in new lower location. Much better, they fall naturally under the hand.

Added 1/2"x1/2" strip on top of existing strip on top of boot to have something to screw the aluminum firewall panel to(the screws just went through the 1/8" plywood firewall).

Debated with Gib wether the trim lever I got would work the right way: lever forward>push cable> tab up> elevator down>nose down, seems OK. I guess I will use that locking lever even though it is heavier than the advertized 8 oz. Glued a 1/4 strip to the side of the member to the right of the pilot seat to be able to bolt to it.

  8 hrs

Just couldn't help!

     I have pretty much decided to do away with all the stringers that allow to round out the fuselage, and just go for the boxy WW1 Nieuport look. That would alow me to keep the varnished plywood sides and bottom exposed, with decorative brass nails and screws, and may be a couple of brass or copper strips to cover the fabric/plywood seams. I called FFP to see if Gene sees any problems with that, and he seems to think it is fine, even though he does not know of anybody having dispensed with the rounding stringers. That should save a few pound and make up for some of my cosmetic add ons.

 9
 

Installed front windshield, same as back one, only smaller.

 

Installed aluminum plate on floor below rudder pedals , and moved pedal back and a little in so bolt would clear member. Also had to trim the passenger seat a little on each side so the toe brake bracket would not rub.

Shortened travel of pedal by moving the bracket up about 1" to the level of the hinge bolts.

Made right rudder pedal with toe brake to match the left one.

Shortened push/pull rods so neutral position of pedals is more vertical, so the toe brakes can be operated with full rudder.

I need to figure out the best way to attach the tail wheel to the rudder push/pull rods. Just to see, I made two flat 1/2"x1/8" connecting rods attached to each side of the rudder horn , and to the brackets of the tail wheel with the supplied springs.Kinda works...

 

I got the idea from Buddy Tollison to use sheep skin guides for the push rods, as was apparently done in olden times. So I ordered some scraps from Tandy, and tried a piece screwed to the seat cross brace. I may have to spray the wool with WD40, or grease it, but it seems to work, and Ilike the idea....

  8 hrs

10
 

Cleaned up and organized tools.

Spackled other side of stabilizer/elevator unit .

Fit plywood sides. Had to cut forward pieces a little longer . Traced position of all longerons and members on the inside . Drilled small holes at key locations to line up decorative nails with center of members. Sanded all panels inside and out.

Varnished inside of panels except where they will be glued to the frame.

Cut, fit rod ends with rivets and installed final linkage between front and rear rudder pedals.

Cut, fit rod ends and install final linkage for right rudder pedal.

  8 hrs

11
 

Gave a second coat of varnish to inside of side panels except where they are going to be glued to the frame.Gave 2 coats of varnish to outside of side plywood panels.
Sanded and second coated other side of stabilizer/elevator unit

Attached side panels with temporary screws and put cowling back down over their top edge. Cut slots for wing attachment to rear spar carry thru .

Trimmed four 3/4"x1/4" stringers down to 1/2"x3/16" to glue to geodetic in tail section so the fabric touches those instead of the geodetic . I definitely like the way the light shows the structure through the clear fabric in the picture, and that confirms me in my desire to just clear coat the fabric.

Made new wider aluminum bracke.t to replace the heavy steel bracket and attach the trim lever. Installed the Bowden cable with fittings. Had to enlarge the hole in the Bowden cable clamp to fit the 7/32" casing and the hole in the B-nut to fit the .078 cable.

Tried fitting the trim tab brackets with a B-nut and cable housing clamp. My only concern is the short travel of the trim tab lever in the cockpit . I may have to make a taller bracket to mount to the trim tab to increase the lever arm and therefore the travel . I could also drill a hole closer to the axle of the lever in the cockpit.

  8 hrs

I am going to have to come to a decision about the engine. Looks like the dream of the HCI Radial may be just a dream, as I can't find anybody flying one... Considering the enormous cost of and the unproven design , there is too much of a risk of failure. The Verner firing only once per rotation gives me concerns about vibrations. The Jabiru was actually tried on a Classic and did not cut it. The Rotec is too heavy , and so are the VW conversions. I really don't want a 2 cycle.

That pretty much only leaves the 80HP ROTAX 912UL. It has a proven track record in many airplanes, the 1500 hours TBO speaks for itself. It is expensive, but should hold its value well, as there are no used ones to be found anywhere. I was quoted $11250, to which one must add the radiator, oil cooler, exhaust kit, engine mount, etc... Gene is going to get me a price, but has no installation instructions whatsoever. He has a motor mount design for the Dakota Hawk that might be used as a departure point to make one for the Classic.

I sent an e-mail to Stefan Wode in Germany to ask hin about his 912 installation. He seems to be the only one that has put a ROTAX 912 on a Classic, and since he just flew it to England, it must be running pretty good! Hope I can pick his brains...

 


12
 

Made and installed two aluminum backing plates for the third cabane member.

Used iron to stretch fabric, first at 250F, then to 350F twice . I used the littlecoiled spring thermometer, which seems to work fine. Brushed a coat of Poly-Brush on one side, glued rib tape and 1" pinked tape.

Brushed a coat of nitrate dope on the other side, then a coat of butyrate. Polybrush seems best, goes on smoother, doesn't smell as bad.

  3 hrs

13
 

Gave a second coat of Poly-Brush, OUTSIDE !

Lined up stringers on sides of geodetic tail section , and glued in place , with little spacer blocks where necessary.

Dave Melvin came by to look the plane over, and seemed to like it. He pointed out the pedals were narrow, which I know. You have to fit two pedals and a seat in 24'',so you either need very narrow shoes( I looked at driving shoes on the internet) , or passengers with very small butts! Actually, preferably both...Also, the bolts on the side of the rudder pedals tend to catch on the vertical member. We looked at a way to attach the brakes, either a bracket, or bolts through the washer welded to the axle. Decided to drill 2 holes , after grinding away part of the lip, and bolt them.

  4 hrs

14
 

Sanded stringers and geodetic on tail, and gave a coat of varnish. I will have to turn the fuselage sideways to do the bottom, but first need to decide whether I leave it flat as the sides, or round it, even build a fairing for the control stick connecting rod that sticks out under the bottom of the fuselage. I may have to make a turning jig to cover it anyway.

Cut and installed sheep skin guides for the push/pull tods, screwed to wood blocks glued to the side of the bulkheads.

Started designing the Artwork for the name of the plane: Spirit of Thomas?  Espiritu Tomas? Spiritus Tomas?

I called Fisher about thee drums brakes being identical, and Gene tried to sell me the new hydraulic disk brakes. I would like them, but that's what I got, and will try to do with them. Having trouble with the alignment of the brakes though, that are not well centered with the wheels. Loosening the screws attaching the drums helps , but I don't like that much. If I were to go with new wheels and brakes, I would love some big WW1 spoke wheels, so I did some research on the net. Not much to be found , except some nice sturdy 24" ones designed and made by Airdrome Aeroplanes for WW1 reproductions. The only problem is they cost about $250 each(not assembled) and also weight 18 lbs each! The wheels I have actually only weight 11 lbs... That would be 14 lbs extra, and would raise the axles 5". I suppose I could extend the tail wheel spring down... That would be the right look...

Moved ball bearing on inside of rudder pedal bracket, so bolt head does not catch on vertical member anymore. I could also replace it with a clevis fork.
  5 hrs

On this Sunday 15, I was feeling a little lazy , and just wanted to see what the airplane looks like with the tail pieces and a wing on . It is so nice and cool outside I just stuck the wing out the door...Enjoy the pictures: :
I then moved the fuselage over to the other table , so I can start  working on the wings. I have already got almost 400 hours in this project already!

16
 

I am going to first finish the wing that Tom Hall built, and make the aileron, before building the remaining 3 wings.

Glued 3/8"x1/16" strips to 1/4"capstrips on the top side of the wing, to re-enforce the ribs(Fisher now uses 3/8" instead of 1/4" capstrips), to make plywood leading edge wrap and wing walk level with ribcaps, and to have a 3/8"wide rib lacing stitch over 3/8" cotton tape.

Started shaping profile of wing tip bow.

Designed Artwork for name of plane: the Spiritus Thomas . I will cut it out of thin aluminum sheet and glue/nail it to the side of the wood fuselage .

  4 hrs

17

Started on the aileron this morning, and finding a lot of discrepancies between the blueprint and the reality. The aileron spar is not quite wide enough (because the ribs are a little taller than they should), and if I notch it by the blueprint, it will be loose. The plywood end ribs for the aileron are on the small side too, and the leading edge shape is more eliptical , which diminishes the angle of travel up and down. Should I trim them into a perfect circle as per blue print.

Also wondering just how much clearance to leave on each side. Chuck said 1/4" would be good.

I went ahead and installed the hinges to see how the aileron is going to fit and rotate, and what the gap is going to be as it moves up and down . I cut a temporary bevelled strip, and bevelled it at a sharper angle and moved it back and forth until I got the best possible fit. That gives about 1/4" gap at neutral,almost no gap on top with aileron up 28 degrees, and about 1/2" gap on top with aileron down 25 degrees. I suppose that is satisfactory.

It seems to me though that the gap could stay about the same through the rotation if the hinge pin was moved further back to the center of the circle. But that means the hinge would have to extend farther and the hole in it be moved back too. That would require new hinge brackets. I will make it work with what I got!

4 hrs

18
Cut and glued 3/8"x1/16" strips on top of the 1/4" rib caps on the other side of the bottom right wing. As the image shows, no staples, as they would damage the narrow 1/4" cap . and leave holes that are a lot of trouble to fill. Small clamps, clothes pins and 1" masking tape do a better job.
Bent three 1/8"x3/4" strips in a nail jig to make an extra laminated bow to attach to the top part of the flimsy 1/8" firewall plywood. That will give someting to attach the alumunum cowling to. I know I could glue the strips wet, but just would rather let them dry first.
4 hrs

19

Got a piece of 1/4" aircraft grade ply from the model shop and cut 2 new larger end ribs for the aileron, mounted the hinges, marked holes for pins in place, drilled and installed pin hinges, glued the aileron spar  and end ribs in place .

While it dried, I cut all the geodetic pieces and the 1/4"x1/4" spar caps.

Sanded everything smooth, and spackled leading edge ply with aero-poxy to get a smooth flow into the rib cap strips.
4 hrs

20

Cut new larger nose ribs out of 1/8' ply to match end ribs and glued them in place.

Fit and glued geodetic on the bottom side. It is not clear from the blueprint whether there are 2 layers of geodetic in aileron, but I will put two..

Cut aileron off the wing. Notched trailing edge fill strip to glue to rib ends.

Feathered edges of wing walk.

Spackled other side of leading edge ply with aero-poxy, as well as the front and side of wing walk so the curve flows smoothly into leading edge

The blueprint did not show any geodetic in the 3 cells next to the aileron, so I added some after checking with Fisher.

Also glued the geodetic to the compression members with small spacers.

The aileron hinges are a very basic 1/4" steel pin rotating in an aluminum bracket drilled with a 1/4" hole . I am concerned the aluminum will wear with time, and asked Gene about using either a bushing or a ball bearing. His answer was that they now had a stainless steel hinge. That is better, and I could use it if it fits the existing hinge holes in the rear spar. Dick Simpson used rod end bearings in his Tiger Moth.
6 hrs

21

Sanded ends of cut off ribs to fit curve of leading edge. Cut and glued geodetic on other side of aileron. Glued 1/4"x1/4" strips on the edge es of the 1/8" plywood aileron spar , and 1/8"x1' plywood side stiffener.

Made jig to bend 1/32" plywood for leading edge, wet 2 pieces and placed them in to dry.

Sharpened bevel on the 1/4"x 1" trailing edge strip , cut 1/4"x1/4" notches, dry fitted , trimmed ends of ribs some to get proper clearance, and glued it to ends of ribs and side of ribs at root end and tip end.

Experimented with painting/antiquing the fabric panel with a mixture of Liquin and transparent artist oil paints . It had been previously given 3 coats of Poly-Brush. Another coat of or 2 of Polybrush should be enough to protect it now.

Gave one coat of varnish stain to the bottom side of wing, the old fashion way, with a little bristle brush... Takes for ever.
8 hrs

An e-mail from Phil Miller in California is making me reconsider the VERNER  133MK option. His pointed out that twin BMW motorcycle engines run very smooth, and that I should not disqualify the Verner just because it has only 2 cylinders. So I e-mailed Kim Brown, who  according to Gene is putting one on a Dakota Hawk ,to get his take. His engine is the older 1400, which he bought used on e-bay, and he has not run it yet. So I e-mailed the distributor in Florida and am awaiting more info.The Verner site shows an exhaust configuration that would work. iled An e-mail from

23
Drilled hinge bracket hole 3/8" and fitted bronze bushing in. I am a little concerned about the strength of the aluminum around the bushing. I would prefer a larger bracket. Gene is suggesting to get the new all stainless steel hinges.
Fitted the rod end bearings to the aileron push rods andL shaped lever. Had to replace the sleeves. The problem I see is that the bearings fit to the side of the lever and the lever might bind . I may have to add a second lever to center the forces.
Got from Aircraft Spruce a keyed 4 position ignition switch , and a nice starter button with a rubber cover.
2 hrs

24

Varnished other side of wing and aileron.

Dry fitted 1/32" plywood leading edge of aileron and marked glue lines. Varnished inside parts except for glue lines.

Laminated firewall bow.
5 hrs

25

Finished varnishing wing. Gave second coat to inside of aileron leading edge plywood.

Screwed beveled 2x4 to table and nailed trailing edge of right top wing to it. Slid 11 ribs over front spar,and glued them in trailing edge slots, using rubber bands to hold them tight.

Glued root rib to main spar against a block screwed to the table so they are square. There was a 1/8" gap between the top of the spar and the rib cap that was filled with a small piece of 1/8" plywood. Even though Chuck said it was not necessary, I decided to glue the 1/8" thick vertical member of the ribs to the front of the spar. I want all the strength I can get.
The gas valve that came with the kit looks like a small ice maker line valve ,and being installed just below the tank in front of the passenger, it would be impossible for a pilot alone to close it in case of an emergency. I found parts at Lowes that will allow me to fit a 1/4" NPT ball valve , and I will modify the lever to control it from the pilot dash with a T-handle cable .
5 hrs

26

Glued all ribs on main spar. Used 1/8" plywood spacers to fill gap between top of spar and rib cap, with additional 1/32" or 1/16' shims.

Slid in rear spar , and glued ribs to it . Beveled a 1/8" strip to make little wedges to fill gaps.

Trimmed half ribs and glued them on.

Glued the two 1/4" beveled strips at the front end of the ribs .

Started cutting and gluing in geodetic.

8 hrs

27

Finished geodetic on top side of wing.

Glued nose ribs, holding them in place with masking tape.

Fit and glued in wing tip bow, after notching first nose rib. Added 2 blocks at each joint and a flat 1/8"x3/4" strip between the last rib and the tip.

Cut a bunch of 1/16"x3/8" strips to cap 1/4"rib caps.

Glued 1/32" plywood leading edge of aileron . Masking tape worked great to hold it in place to dry.

Wet plywood for wing leading edge and put it in the trough to dry overnight.

8 hrs

28

Turned wing over , cut and glued 4 compression members with gussets, and geodetic on bottom side of wing.

Started buildind aileron. Cut 2 new larger end ribs out of 1/4" aircraft plywood.

Drilled rear spar for wing attachment brackets. I should have done it before on the drill press, but did not realize it had not been done. Enlarged holes to 3/8" and glued in aluminum sleeves for 1/4" bolts. Mounted wing attachment brackets to both spars.

Cut out end of root rib and part of the trailing edge to allow for 45 degree cutout in wing and hatch. I would rather make a larger rounded cut out with 2 layers of laminated 1/16" plywood and may be dispense with the hatch altogether. It would look better than that straight cut .

Blew up the design for the name on the computer and taped it to the side of the fuselage to see how it would look . That would be cut out of thin aluminum flashing material , glued, and nailed with small brass or copper nails to the plywood side . I might spell Thomas with no h as latin Tomas instead.

8 hrs

29

Installed hinges to build aileron, cut trailing edge to fit end ribs, notched aileron spar and glued it in place with blocks. Drilled end ribs for hinge pins and glued them to spar and trailing edge.

Cut and planed a bunch of 1/8"x1/2" strips out of larger stock and cut geodetic for bottom side of aileron.

Notched front of trailing edge piece 1/4" and glued in the extra plywood rib and doubler to attach aileron horn at midway point of aileron.

 

Added two extra 1/8" ply nose ribs were the 48" sections of skin meet . Cut 1/32" plywood skin sections to fit . Taped leading edge skins to the front ribs and marked the glue lines on the back side.

6 hrs

30

Sanded nose ribs for smooth transition to rib cap. Glued nose skin sections in place and held them tight with a lot of strips of 1"masking tape. I would rather do that than shoot staples, which are more destructive, and then have to be pulled, and leave holes that are a pain in the butt to fill.

Glued aileron 1/4"x1/4" spar cap strips, and geodetic pieces on the bottom side.

Glued aileron nose ribs after cutting new ones out of 1/8" plywood.

 

Glued the 1/16"x3/8" strips on top of the 1/4" rib caps. Taped those on too instead of stapling.

Talked to Gene about a round top wing opening instead of the 45 degree cut and no hatch, and he is OK with it. Cut a piece of 1/8" ply to make curve.

8 hrs

30

Glued more of geodetic on top side , as well as aileron spar cap pieces.

Glued 1/16"x3/8" strips on rib caps on top side of wing. Marked scallops using Tom Hall's template, and cut them with a sharp knife.

 

Sanded and spackled lower right aileron leading edge and ribs.

Cut out an S out of the thin aluminum flashing and realized it was too flimsy, so I cut the letters out of .035 thick cowling scraps . They look nice, but I will need more aluminum.
8 hrs

TOTAL    475 hrs

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