HHjul

OK guys, here´s some pics of the vacuum formed ABS cowling side I made today. The vacuum forming procedure itself goes nicely, but I´m not happy with the result. I still have to fix my balsa mold, there´s some small imperfections in the final surface that I want to get rid of. I have sanded the mold completely smooth but it is just not enough. I have to cover the soft balsa surface by fiberglassing it and then some priming - sanding procedure is needed. I just want to sell a perfect product. I have learned my lesson: the mold has to be flawless - just like making fiberglass parts.

HHjul

I have lacquered the balsa mold pieces heavily, some sanding and more lacquering is still needed to make the mold surface hard and smooth. So, I´ll have the cowls ready for shipment after next weekend. My digital camera stopped working, so I can´t show you any pictures today.

I have finally continued the tail feather woodwork, I except to have them finished within two weeks. I will build the fin exactly as the Sig plan shows, but the rudder will be made by the same way as the stabilizer and elevator. After that, it´s time to start the wing construction.

I have also decided the covering and painting methods - as well as the paint scheme. I will cover my Super by using silver-coloured Solartex and automotive paint. I used this method in my other Super Cub, and I really like the realistic look of the covering. Silver base colour in covering prevents the sun shining through the structure in flight. The paint scheme is that classic original red - and - white Super Cub factory paint I like very much. Please see the pics. That paint scheme gives the plane a nice vintage look. And, the float installation will be permanent. I will finish this building thread by showing how I build Edo round top floats with aluminium streamline legs and rigging wires. But, not until the plane itself has been covered and painted.

The building motivation is quite high right now and you will see some quick progress.

One more thing, I haven´t found any better pictures of early 60´s classic paint scheme. Please post 'em if you have some.

skylarkmk1

HH,

Have you tried Airliners.net? There are over 1100 photos of the PA-18 Super Cubs. I would guess that most of the SCs have been recovered and painted with the newer 2 parallel stripe design or to the owners taste, often quite colorful. Many of the SCs are shown on floats or skis or even with 4 blade propellers. Most appear to be registered in Europe or South America. Only HB-OXX (page 23/24) has the scheme you posted and was photographed in Raron, Switzerland July 2005.
There is a link to the photgrapher, maybe he has more photos of HB-OXX

jeff naul

My Feedback: (16)

hey guys, a few weeks ago i posted a guestion in the scale forum about the original cub guages. no one seemed to know what i was talking about. a few years ago i was in a hobby shop in monticello, arkansas and hanging on the rack next to the scale cub wheels were scale cub guages. there were three different sizes too, 1/5, 1/4, and 1/3 scale. these were the guages with the cub emblem in the whit face. ANY HELP????? thank's jeff.

skylarkmk1

Jeff,

U.S. Cockpits http://uscockpits.com/ has a photo of a Piper L-4B and a L-21B (2 photos).

Dynamic Balsa http://www.dbalsa.com/ has ¼ scale complete cockpit (Instrument panel, seats, etc) for the Dave Patrick Supercub under Master Series. Has white faces, but can’t tell if they are the “Cub” face.

They also have the J-3 instruments for the SIG, BUSA and Nosen under Sport Series

Tower http://www2.towerhobbies.com/cgi-bin...&I=LXR673&P=SM carries the J’Tec ¼ scale instrument kit http://www.jtecrc.com/ Generic, not Piper specific.

Propagteam http://www.propagteam.cz/home_en.asp has decals and Instrument panel kits (look like they are 3D), black face. Available through Hobby Lobby or Flightdecs

Also look at The Cub Den http://www.thecubden.org/ for scale ideas and such.

Unfortunately I don't remember where I got the first 2 photos below. P3 is a Super Cub panel (original round profile), P4/5 is a newer square style panel as used by Cub Crafters.

Cub Man

My Feedback: (50)

Jeff shoot me your address and I will send you a set of them. You will need to build the panel but I do have the guages. Some day I will get to a point where I can mass produce them to sale.

HHjul

Today I have continued the tail feather woodwork. The weather is becoming very unpleasant for RC flying here in Scandinavia, so the building season is about to start right now!

The stabilizer is almost ready, the elevator(s) are on my table right now. I´ll post some pictures later today.

I have also finished the ABS cowl mold pieces by priming and sanding them a lot. So, I´m ready to receive the cowl orders. The price I´m asking for the set of ABS cowl pieces is 20,00 Eur (= 13,80 GBP = 27,60 USD). The price does not include delivery, the approximate shipping costs to USA (except Hawaii and Alaska) in economy package are about 15,00 Eur (= 20,70 USD). The shipping to Europe it is approx. 10 Eur.

Please send your orders to my email address (remove "NOSPAM"):

[email protected]

Including your name and your complete delivery address.

The preferred and most likely the safest payment method is PayPal. After receiving your order, I will send a money request by email through PayPal. I will ship the cowl immediately after receiving the money.

I will send a template with the cowl to ensure the correct location of the cowl openings.

Some of you who have already sent the orders to this thread some time ago will be served first.

Cyklamera

Hello.

I just wonder if there anyone who know if it´s possible to fly a SIG 1/4-scale Piper J-3 Cub (SIGRC48) with a Saito FA-72 engine or is this engine to small?

I know that SIG rekommendations is .90-1.60 cu. in. 4-stroke which becomes 14.75-26.22 cc.

.72 cu in = 11.80 cc

I have a Saito FA-72 that I wonder if I can use in this Cub.


Thank you for all help!


Best Regard´s
Mats McLund
Sweden

skylarkmk1

Mats,

I think it would be way underpowered for the 1/4 BUSA Cub. SIGs 1/4 Cub has the same engine recommendations. I know some have put .72 4s in the 1/5th SIG Cub, put it is overpowered and doesn't fly in a scale manner with that power unless throttled back. I don't know how you feel about WW I aircraft, but the BUSA Taube 90, Eindecker 90 and Bristol M-1 all suggest engines that cover the .72. The .72 for the Taube is at the lower end, right in the middle for the Eindecker and towards the upper end for the Bristol. Good luck.

HHjul

OK guys, some progress. Tail feathers are ready (almost), only some hinge work etc. left. Just couple of hours, and then it´s time to start the wing construction. Please see the pictures.

The drawing under my rudder comes from www.supercubproject.com, I printed it and scaled to correct 1/4 size. I have built the fin as the plan shows, except that it is only 6 mm ( 1/4" ) thick... as well as is my stabilizer and elevator.

I will start my wing construction by building the center section first. Some modifications will take place, because of the larger top window in Super Cub.

If someone (?) has already started the wing panel construction, please show your results. I will start mine quite soon. I will build the wing panels without the ailerons. I just find the original wing + aileron building method quite clumsy. It is easier to build the wings and ailerons / flaps separately.

I´m ordering the required servos and radio gear today, I´m going to use German Multiplex servos and receiver. Ailerons, flaps and throttle will be operated by Multiplex #65123 Mini HD standard servo, and #65126 Tiger Carbonite for tail feathers. Comparable Futaba servos are S148 and S3010.

Yak18

My Feedback: (11)

You will need at least a 1.20. My 1/4 scale Sig J-3 was powered just right with the 1.20 Saito. Meaning it was underpowered just like the fullscale J-3. Your .72 would be great in the smaller and better kitted little brother, the 1/5 scale. It is still large at 1/5 scale with an 84 inch wing. If I do another Cub, I will be getting the 1/5th.

Yak

HHjul

I´m back after a very busy 4 week working period and now I have more time for hobbies. It means some Super Cub building progress.
I have promised myself to finish the woodwork of my model within this month. Let´s see how it goes.

I have started the wing building by assembling the wing center section. Originally, I was going to design my own center section to make the top window larger as it is in real Super Cub. Anyway, I decided to use the original building method except that I enlarge the window opening as much as possible. Please see the picture. There is only some small extra balsa sheet pieces needed.

I´ll start the wing panels as soon as the center section is finished.

racer-RCU

My Feedback: (14)

yak18 i dont see how a 1.20 is scale power on a 1/4 scale cub, mine weighs in at 16.5 pounds and i can still take off and climb out at a 60 degree or so angle, a .91 would be more so scale power. Im not trying to start a confrontation just cant imagine scale power with a 1.20

Yak18

My Feedback: (11)

I never weighed mine but it was heavy. Covered in super coverite and painted by a person who restores fullsize cubs. I think he sprayed on 5 coats of dope. It also was fully detailed...full cockpit, pilot, dummy engine etc. I had onboard glow plus what they called 1/4 scale servos back then. (huge servos) It was pretty, but heavy and flew scale like on the 1.20. I agree that a 1.2 would provide more than scale performance on a light cub. Mine probably weighed at least 20 lbs. Still flew great though for more than 8 years before I sold it.

Yak

racer-RCU

My Feedback: (14)

ok yeah i can see how it would be more scale now, wow i couldnt imagine flying my cub 4-5 pounds heavier lol

HHjul

Wing center section is finished and I´ve started the right wing panel. I´m not using the original aileron building method of the kit... instead I build them ailerons (and flaps) separately. Also, some very minor wing panel mods are needed for flap installation. Pictures will follow in the weekend.

Cyklamera

HHjul or anyone other SIG Cub-builders,

What type of glue are you using when you glueing together your Cub construction?

McLund

HHjul

I use the following brands:

- UHU Hart hobby glue (in 90% of my glued wood joints)
- Flash thin cyano
- Flash medium cyano
- fast and slow Araldit epoxy
- PVAC white glue (B3 water resistant)

I have found the traditional German hobby glue UHU Hart to be absolutely the best in normal wooden structure building. It is very cheap, strong and fast drying. Also, it is the best canopy and window glue I have found so far. As an "old-school" glue, its thinner-like odor is quite strong. I use cyano and white glue occasionally, and epoxy when extra strong joint is needed (firewalls etc.) White PVAC glue gives a lot of "open-time" to adjust the glued pieces if needed.

I think UHU Hart is available in Europe only.

HHjul

My right wing panel is about to become finished this week. Then, there´s only the left wing panel left until the basic woodwork is done. Ouch, I almost forgot flaps + ailerons. Pictures are not good and sorry for the (usual) mess in my workshop.

As you see, I have modified the wing structure in order to build the ailerons separately. I will post more pictures later this week.

Also, here´s a poor picture showing the enlarged center section window.

Navy18

My Feedback: (4)

HH,

Very nice progress... I will cut my left aileron tonight. Can I get the paypal address for sending $$ for the cowl?

Thanks.

HHjul

My both wing panels are ready - except the wing tips, ailerons, flaps and some minor details. Should get those done during the holiday. I´ll post some pics in the weekend.

SunDevilPilot

HHjul,

Is the centersection of your fuselage stock. I see the kit lists a "2 piece" wing. Yours appears to have a separate center section and two wing panels. I prefer what you have opposed to a 2 piece wing that bolts down to the top of the fuselage. I am building the Sig 1/5 cub and it attaches much like yours.

The reason I am asking is I plan on purchasing a Sig 1/4 cub as my next project and converting it into a super cub.

Thanks in advance,

SunDevilPilot

HHjul

The center section is stock - except the enlarged window. The earlier picture shows the center section before it was glued permanently to the left wing panel. Here´s a picture showing the final center section structure. I left the right panel - center section joint open for clarity. So, the structure is basically stock. The picture shows those small fillets next to center section trailing edge. They are necessary for flap installation.

SunDevilPilot

Does the center section get glued to only one side, IE Left, making it 2 pieces?

Thanks for your answers,

Phil
(SunDevilPilot)

Cub Man

My Feedback: (50)

if you build the sig cub by the plans the center section is attached to one side of the wing. I have info on my site on how to build it so the center section can stay on the cub and both sides plug into it