Sky Tiger (oz10303)
About this Plan
Sky Tiger. Radio control sport aerobatic model. For 4 channels and .40 to .61 engine. Wingspan 563 in, wing area 715 sq in.
Discontinued kit from Carl Goldberg Models.
Quote: "This is Carl Goldberg’s Sky Tiger. I hope someone can use them. I like what you're doing and thank you. Thanks, Chris"
Direct submission to Outerzone.
Update 09/08/2018: Added kit review from MAN February 1984, thanks to RFJ.
Update 28/09/2019: Added review from Flying Models, April 1984, thanks to RFJ.
Quote: "FM Product Review: Carl Goldberg Models' Sky Tiger, by Ron Farkas. This new sport kit features both realistic performance and appearance, with interlocking construction. A sure winner.
Believe it or not, the attractive, realistic airplane shown on these pages is the new Sky Tiger by Carl Goldberg Models, Inc of 4733 West Chicago Ave., Chicago, IL 80651. My Sky Tiger is finished to look like a Piper Cherokee that is tied down at an airport near work. This transformation required absolutely no kit modifications, just the addition of wheel pants and some extra work on the covering and trim. You could do the same or copy one of thousands of color schemes that look like Pipers, Beechcrafts or what have you. But the Sky Tiger doesn't have to look like a scale anything. Instead just use your imagination and you can have an EAA homebuilt type ship. Truly the Sky's the limit (pun intended).
Considering this realistic appearance, I was also looking for scale-like flying characteristics. Therefore, I put an Enya 60-4C four cycle engine in my Sky Tiger. Powered this way, I have done some of the most relaxed sport flying that I have had in a long while. Even the sound of the engine seems to make flying more enjoyable. The Enya 60-4C engine is a good match to this plane but a four stroke is not necessary Any .40 through .60 two stroke engine will do the job.
The Sky Tiger is a very well mannered airplane. Some of the things that contribute to its great flying characteristics are the relatively long nose and tail moments, generous wing area of 715 square inches, thick semi-symmetric airfoil and ample tail area. The wing span is 63 inches which makes this a nice size ship, not too small nor too large. The recommended weight is 51/2 pounds which calculates out to a wing loading of 17.7 ounces per square foot. A .40 size engine is sufficient and a .60 would give power to spare.
Flying the Sky Tiger is pure pleasure. It has always made me confident that it would never do anything to surprise me like drop a wing tip on final approach. Because of its moderate wing loading, it can be flown very slowly if you wish. It is very forgiving of pi-lot mistakes and always responds positively to control commands. I found that it main-tains its flight trim over the entire speed range. In addition, it is quite capable of doing all the familiar sport aerobatics. At high speed it is stable and predictable.
If all this praise has made you consider getting a Sky Tiger then let me tell you about building it. The fuselage construction is especially interesting because all of the parts are stamped out of 1/8 inch lite-ply. In the past I have seen this method used on some imported kits and it seems to work well as a substitute for balsa in model construction. Lite-ply is great for box like structures but does not go around curved surfaces. The Sky Tiger fuselage is a basic box shape but the huge molded canopy makes you forget about the square corners. The result is a very pleasing appearance when the model is completed.
All of the 1/8 inch lite-ply sheets are packed at the bottom of the box. The wing ribs are cleanly stamped from 5/64 balsa and these sheets are neatly bundled with rubber bands. Spars, leading and trailing edges, and strip-wood for the tail are likewise rubber banded together. A separate cardboard compartment protects the canopy. The extensive hardware assortment and pre-shaped wood parts are contained in two heavy plastic bags, stapled to the side of the box so they can't shift around. The well detailed full size plan is neatly folded and placed on top of the materials. The kit comes with a very comprehensive illustrated instruction booklet of 32 pages. Building, covering, and even flying are thoroughly explained. All the building materials were of good quality and my kit was found to be in excellent condition.
During assembly I followed the instruc-tions to the letter. Using Goldberg Jet and Super Jet adhesives, the construction went so fast that I did not look for any short cuts. I did not have to change anything or replace any materials. I'll only highlight some of the Sky Tiger's novel construction features.
The die-cut, lite-ply parts practically fall out of their sheets and only require a little block sanding to take the fuzz off the edges. The fuselage pieces key together with tabs and notches to assure proper alignment. The notches are just a little oversize to allow for final adjustment before gluing. The fuselage is built in your hands, not on the board. All interlocking parts should first be assembled and held together with tape and rubber bands. After a final check against the plan top view, you just run a bead of Super Jet along all the interior joints and seams. Presto, instant fuselage..."
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User commentsHello, I had these photos in my files for the Goldberg Sky Tiger [more pics 003-006].
JeffGreen_LasVegas - 22/08/2018
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