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November 2010

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The next meeting of the season of The Scale Flyers of Minnesota will be held on Friday, November 26, 7:00 p.m. at the American Legion Post, 6501 Portland, Richfield.  (Directions)

Subsequent meetings will be held on the last Friday of the month, January thru March.  Mark your calendar's for: (No December meeting), Friday, January 28, 2011, Friday, February 25, 2011, Friday, March 25, 2011

At the last meeting ...

Cal Branton proposed our Saturday Night Banquet  for sometime in January.  Stay tuned!

The recent passing of long-time Scale Flyer Jim Jacobson (right) was discussed.  A card was passed around for signatures.

Jack Reeves (left) is in declining health but flew recently at Minnesota Valley R/C.

John Baligrodzki reported on the Minnesota Scale Classic contest.  Contestants came from as far away as Milwaukee.  One contestant forgot the wing tube for his Cub.  His wife observed that the aluminum tubing in his lawn chair appeared to be the same diameter.  So he cut a section of tubing from the lawn chair with a hack saw.  It fit and he flew two rounds.  John especially enjoyed watching Tim Johnson and his son Corey Johnson competing with each other.  Both flew very well despite the wind.  John plans to CD the Minnesota Classic again next year.  Well done, John.

John also reported on an accident at a flying field near Brainard, MN.  A fellow started the engine of a plane resting on a table in which the tail was not secured.  It started at full throttle.  Cuts on both arms and one leg resulted in 90 stitches.  The medical bill was $30, 000 ... Be Careful, Guys!   Always tug on the prop before starting.

Brian Crossley reported on the closing of the TriValley field in Rosemount.  It closed at midnight on Halloween after 30years.  Lots of good memories.  Sniff.

Goodbye TriValley

Photo by Tom Kimmel

Steve Mills presented his electric-powered Boeing 727-200 with a 45” wingspan and weights 18 oz.  He presented it partially completed so we could see the internal structure.  It has fixed gear and two 40 mm fans with one 3-cell LiPo for 5-6 min flight time.  It is a prototype of a kit to be offered by Zeke’s Park Scale Models.  $125. Designed by Zeke Brubacker.  No plans are needed, CAD elevation drawings provided instead.  The parts lock together. 

John Antholz purchased his Yellow P-38 Lightning from a guy in California who “was too afraid to fly it.”  It has two US 41 engines, doors, flaps, brakes, Yellow retracts, 100” span, 40 lbs.  Thomas McQuire color scheme.  John re-hinged the elevator because “it was sloppy.”   He converted the radio to 2.4 MHz--“miles of wire.”  He will add a gyro but will avoid engine sync because “there are problems with synch for gas engines.”

Mark Wolf showed his Balsa USA quarter-scale Cub.  Beautifully done, exquisite detail.  108” span, Quadra 35, 18x8 prop.  Wayne modified the firewall for the bigger engine.  Stits covering.  Letter Tech Graphics (St. Paul, MN "Frogtown").  Scratch-built gas cap, tail braces, jury struts, windshield.  1/8” O-ring bungee chords, 5 each side.  His mother sewed the bungee chord covers.  Rib stitch tape from Scale Rib Stitch.  Stits polyester paint is the consistency of water but run-resistant.  He used Stits primer followed by two coats of silver (just like the f/s), two coats of yellow.   Roof window was tinted with a thin coat of Testers Candy Green sprayed on the underside only.  John described how he fitted the windshield using fiberglass cloth attached with wood screws.

Roy Maynard presented his Me 163 Komet (Sunshine Models of Germany, imported by Vogelsang Aeroscale), a scale  model of a rocket-powered interceptor, the fastest airplane of WW2. 36 lbs thrust Evojet Turbine with smoke.  KlassKote paint and dry transfer markings.  Dolly take-off requires full throttle and long run.  One gallon tank for 8 minute flight. Skid landing, steerable tailwheel.   Elevons move up only.

Aluminum hatches.  “Absolute great flyer…I handed the transmitter to Joe (Grice) and he never gave it back until after it landed.”  Roy described Joe Grice’s modification to the kit--he removed the wing tube inside the fuselage and supported the tube ends with formers.  This allowed the turbine to be moved forward, saving several pounds of weight. Roy plans to do the same mod. Painted screens and extra air scoops under the wing provide air intake for the turbine.  Three flights so far.  “Very, very easy to fly.”  43 lbs dry.  But structure is “old fiberglass”—crude with no foam stiffeners.  Glass is much thicker than Byron or Yellow kits.  Requires “hours and hours” of body putty, especially mating wings to fuselage.  Recommended reading: Top Secret Bird.

Karen Johnson reported that she and Tim will host a fly-in at the Owatonna field on New Years Day.

Jon Bomers who works with composites in his modeling wanted to share (virtually) an old idea applied in a new way.  In the 18th century, Giovanni Battista Venturi discovered that when compressed air is forced through a restrictive nozzle, its velocity increases and the air is compressed and when it exits the nozzle, it expands and

has the ability to create a vacuum.  This amazing concept can be used to Build Your Own Vacuum Press to generate vacuum efficiently and economically for  modeling.  If you have an air compressor you can build your own high quality and very powerful vacuum press device, which will rival electric vacuum press’s costing $400 to $500.  This design also cycles on and off when the (Hg) falls below your desired vacuum setting.

A good vacuum press is a very powerful tool that is capable of producing over 1700 pounds per square foot of pressure at full capacity.  The actual formula is 1" of Hg equals 70.56 lbs per square foot.  I pull my composite parts at 24Hg and if I’m sheeting a foam core wing, I adjust the settings to 12Hg to 15Hg depending on the thickness of the foam cores.  As you can see in the photo, I also use a "Floating Bench Top" bench that allows me to re-flatten the top just before I work with a new wing.

The best part is that the vacuum spreads the pressure evenly over the parts and with composites it allows me to use less epoxy and lighter weight cloths to produce lighter, stronger parts.  Another component is that after trying several epoxy brands/systems out in the market … I strongly recommend “MAS Epoxy” the quality, flow and sand-ability are superior to many of the name brands that you’re probably aware of.

The press I built isn’t pretty but it holds the atmospheres to the desired settings I want and only re-engages when the system falls below the set Hg. I put it together for around $150, plus a few hours to build. For more information and parts/building diagram go to

Cal Branton discussed how his friend Nick Lensmier built WACO gliders during WW2.  Now Nick is building yet another WACO glider in Eagan.  It is very large, half wood and half metal.  Tours are available - just contact Cal.  Nick is also looking for volunteers to complete the project.

Some folks put a painting on the wall of their favorite Scale Project or Aircraft.

But their is at least one aircraft enthusiast who likes to take his favorite aircraft were ever he goes!

To Our International Visitors ...

Thank you for checking into our website from time to time.  We appreciate your desire to keep Scale & Giant Scale R/C planes flying everywhere! Consider joining SFM ... the fee is low and supports our efforts to keep individuals like yourself,  who enjoy Scale Aircraft building and flying  informed and entertained!


Annual Membership Renewals

The Scale Flyers of Minnesota renewals are open. Dues are used to support local scale flying events and the use of the Legion Hall's meeting space.

It's only $10 per year.  Membership renewal forms will be available at the next meeting or Use This Form Link ... Just Print it out & bring it to the next meeting or mail it to Brian!


Cal Branton, President

(651) 459-5107

Brian Crossley, Treasurer

(612) 721-4989

D. Andersen, Secretary

(952) 890-9529

Jon Bomers, Web Editor

(651) 343-3407

Fly well, fly safely and share your skills

David P. Andersen, Secretary of The Scale Flyers of Minnesota.


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