PHOTO: ANDY ZANER
Andy Zaner’s 12-foot long T-38 (above left) next to Andy’s Ford F-150 certainly puts the size of his foam masterpiece in perspective. HET’s new Super Sniper XL(above right) from The Electric Jet Factory brings all composite construction to the 90mm edf arena. Minimal parts with maximum flying fun should make this a popular aircraft for the upcoming flying season. The Super Sniper(below left)
PHOTO: COURTESY OF ELECTRIC JET FACTORY
PHOTO: COURTESY OF ELECTRIC JET FACTORY
poses next to a similarly sized airframe, a venerable BVM Viper. While similar in size, the Sniperis far lighter in weight. A broken pin (below right) in a Sullivan 4-40 Gold-N-Clevis. The retainer clips are mandatory to prevent breakage like this, and aircraft loss. A dab of solder on the tab may further aid in the prevention of a lost airframe. Lots of information, and a link to much more in the text.
PHOTO: DAN MASSEY
having lightweight 90mm sized airframes that fly well is, and is a nice change to boot! Clevises: you know, those little springy-
metal things that connect the control horns to the pushrods that we take for granted? Well, for many years I have been a rabid devotee of Sullivan’s Gold-N-Clevis with the metal keeper. However, like many (most?) I have had the keeper come off without any problems—I just replace them when I notice that they are missing. Unfortunately, given the correct scenario, the loss of the keeper can have catastrophic consequences, as hap- pened to a nice KingCat in Texas. Fortu- nately, Sullivan took the situation, and its resultant impromptu testing by a retired aero-engineer, very seriously, running tests of their own, and reporting them on the web.
The full story can be read on RCUniverse
at
http://tinyurl.com/d3fzw5k. However, the condensed version is that the 4-40 sized clevis with its keeper attached ex- ceeds 200 pounds of force in testing (the highest Sullivan’s test machine can go). However, without the keeper, especially if it has been stretched over some of the thicker servo arms like the JR or DuBro heavy duty ones (so it doesn’t want to close) it can fail at as little as 10 pounds of force. In between, we have just fuel tubing around the arms with failures in the 90–130 pound range. Soooo, the moral of the story is that the snap-on keepers are necessary for strength and safety, not optional, and as one poster mentioned, they do take well to solder. So,
Mississippi Afterburner Jet Rally Dixie Jet Rally Central Texas Jet Rally “First in Flight” Jet Rally
Mount Pleasant, TX Jet Rally Idaho Jet Rally
May 3–5 May 3–6 May 17–19 May 24–27
June 14–16 June 15–17
OC-Turbo Fest-Early Summer Edition June 22–24 Thunder Over the Valley Big Apple Jet Rally
Jets over the Heartland FLYING MODELS
June 22–24 June 23–24 June 28–30
Upcoming Events John Bell Williams Airport
Raymond, MS (suburb of Jackson, MS) St. George, UT
ARCA Club Field, Austin, TX
CD: Dan Massey
www.austinrc.org
Wilson Industrial Air Park in Wilson, NC CD Larry Lewis 919-231-4983
rclarry@aol.com
Mt. Pleasant, TX
TVA field in Parma, Idaho Titusville Airport; Titusville, PA Woodland, CA
Brooklyn, New York Winamac, IN
www.mtpleasantrc.com www.flytva.org
jacknbets@aol.com www.wdarc.org
http://winamacaeromodelers.com/ whats_new.html
37
perhaps a dab of solder on the tab after everything is trimmed out might be a good “belt-and-suspenders” thing to do since re- placing a clevis, if needed, is far cheaper than replacing an airplane! The second moral of this story is that Sullivan is indeed a quality operation ded- icated to providing us with quality (there’s that word again) products. When is the last time you saw a senior person at any com- pany respond to a query with an answer and test that he wanted disseminated, so that all would know the strengths and lim- itations of that particular “widget”? Good job Sullivan! Well, I’m out of space, so until next time:
keep busy with the building projects, fly safe, and trust in thrust!
www.mississippijets.com
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