SEN 1214 - 17 May 2008
- Category: Archive 2008
- Hits: 392
- Hoosier Cup 23-24 May
- Andrew on Estonia
- Rossi Screw Update
- Sal Cannizzo
- Gutai progress
- Gutai Get Better
- Beat the Vart ?
- 2009 World Champs Venue ?
Hoosier Cup May 23-24
From: Chuck Markos
Andrew on Estonia
From: Andrew Barron
You ask for clue as to the performance advantage of Deniz Varhos. Here are some observations about the flyoff flight at the Estonia Cup that I mentioned. First he used a model with a wing of the style of M&K extra-long (though somewhat lighter in the tips), a Stamov style fuselage with customary magic timer (with an older style M&K mechanical hook), and a Stamov/Wobeking stab. He had made repeated tests with altimeter back in Sweden on a frozen lake of size that only permitted one glide circle. I think he said the height after climb was consistently 78 meters. The climb pattern does not go completely vertical so that not too much energy is needed to complete the bunt. He uses a more open glide circle than others and a somewhat faster glide than minimally possible, tuned according to projected times from his lake tests. He took the altimeter out for the flyoff flights to slightly reduce nose weight. In the two flyoff flights his sink rate at his slightly faster speed was perhaps better than the other models. His launch height was higher than most.
Rossi Screw Update
From: Bob Mattes
Want to thank those who responded to my request for the screw size for the Rossi 15 but would like to report what really is probably the correct size. In setting up a few Rossi 15's with radial mounts I needed longer screws to pass through the backplate/radial mount . The stock pan head Rossi screws measure right at 0.100 inch ( I apologize for mixing metric and English dimensions) which is a couple thousands more than 2.2.5 mm. Screws are generally a little smaller than the nominal diameter. Also the M2.5 x 0.45 screws I have from Micro Fasteners measured 0.0940 inches in diameter and screwed in just fine but wobble quite a bit. At that point I asked the question published in the news letter.
I continued to look what is really the proper screw size and discovered that a socket head M2.6 screw is available although not at many places or in many different lengths. Found that Grainger, an industrial supplier located in most major cities, carries the M2.6 x 0.45 in 8, 10 and 12 mm lengths. The stock Rossi head screws are 8 mm long and the backplate screws are 6 mm long. Ordered 50 each of the 8 mm and 10 mm lengths and they arrived yesterday. They measure 0.0995 inches and fit much better than the M2.5 screws. If you want some they can be obtained at Grainger. Part numbers are 6CE44 and 6CE45 for the 8 and 10 mm lengths and cost about $12 for 50.
Although the strength difference between a M2.5 and M2.6 screw is not all that much using and undersize screw in a tapped hole can significantly reduce the torque required to strip out the threads in the aluminum casting. Thread depth on a 0.45 pitch screw is only about 0.25 mm or 0.010 inches. Use of the M2.5 screw in a M2.6 hole would therefore reduce radial thread engagement by about 0.003 inches out of 0.010 inches or 30% which should be directly proportional to pull-out strength.
From: Krine Laffler
The Passing of a Legend
Two days ago my lifetime dear friend and former flying partner Sal Cannizzo, at age 80 passed on after battling cancer for the past year! Sal and his wife spent Christmas at my home all the way back in 1955 and we flew together for many,many years.l think l am correct in saying he was the only freeflight flyer that was a member on three U S Freeflight Teams in three differnt events such as first Wakefield,then Power and in later years the Indoor team!
Sal was always humble man and overwhelmed by the fact being born of immigranrt parents and working as a sanatation worker in NYC that he was so openly accepted in our hobby as an equal and spoke to me of this many times.After WWll he learned to fly under the Gl Bill and was a competent glider pilot even building his own craft.As an ardent free flighter he found some things he did not and like and redesigned and rebuilt the tail asssembly on his glider that he was flying and to this day it is know as the Casnnizzo Conversion. l will never go out to fly again without feeling the spirit of my good friend and this lovely man.......Thermals Sal and Happy Landings
Krine Laffler MA 859
From: Bill Lovins
Bob came home from the hospital May 16th and is resting comfortably. I'm sure that he will be back "on line" soon.
Bob Gutai Get better!
From: John Lorbiecki
Beat the Vart Fun Fly @ Nats!
From: Lee Hines
Well, I am honored and proud to announce...
The 2008 Beat the Vartanian Fun Fly!
It will be held during the Nats on an evening
after normal prizegiving is over, as per the prior 2 years.
The rules are simple.
Any Catapult Glider with 12" maximum wing span,
weighing more than 10 grams may be flown.
Launcher per AMA stick and rubber rule.
Heats of mass launches will result in a final for all the marbles!
Any flier beating my Vartanian timed bogie flight gets a special
piece of launcher rubber!
Only a Buck per ticket for your chance to win a kit of Red Mo 12,
last years' winner of Beat the Vart trophy!
Proceeds will be donated to a worthy cause [TBD...Suggestions?].
That's it, be there for the FUNFLY, or be...you know the rest...
yr hmbl srvnt,
CD of 'Beat the Vart 2008 [also Chief Cook & Bottle Washer]
FLY, MAX, WIN!
2009 World Champs Venue
SEN 1213 and maybe this was blocked by Comcast as spam. You need to complain to them.