Radio Controlled Soaring Digest June 2005 Issue
Issue Contents:
Go Grini of Norway has his RCSE post reprinted regarding radio interference and even program scrambling in the transmitter due to static in an electrical storm.
Gamma Dura Guard tape is clear and sticky and strong. The tape can be purchased at gammaports.com
Jay Decker and David Portwood do their 8 hr. slope flight. Highlights of this and previous attempts at Eagle Butte Ideal conditions are 15-20 mph on the face of the slope. Flying started at 8:55 AM.
The full size Schweizer I-26C and the full size glider club its gliderport home and the scale model made of the real thing.
The Moth EPP fling wing by North Country Flying Machines is reviewed. A joint effort of Multiples and Hitec on the Digi Polo servo that gives high resolution than standard servos. Is this degree of accuracy warranted for a foamy? Moving the CG back made the wing faster and more responsive. Smaller surface movement needed. Using a rubber band on the servo arm minimized slop to allow the most reward from digital servos.
A formula for designing a wing spar for a dihedral or polyhedral model. Compressive loads must be handled to avoid the spar/wing from folding. Calculation is made for a 10 oz. DLG at 20Gs and a 5 lb glider in a 40G zoom pull-out.
Some modifications to the Alula foamy improved the strength. Comments on the radio installation are made.
New world record for electric model with all sources of power (226.6 km) in a straight line to Giorgio Azzalin April 24 2004
The latest beta version of the Eagle Tree Systems flight data recorder is reviewed. The FDR logs altitude to 35 000 ft with resolution of 1 ft. Flight speed is recorded to 1 mph or 1.5 fpm and the servo position temperature engine RPM G-force are also logged. The receiver or Dash Board will also connect to a laptop for data logging. The size is 2 Inch x 1.38 Inchx 0.66 Inch and weight of only 0.8 oz w/o case. The unit was evaluated in the XP-3 by Polecat Models. A good data analysis is made of the DLG performance and the record of several good flights. Launch height with sip start > gyro guided DLG > non gyro DLG. Yaw oscillation a limiting factor.
Dr. Perkins comments on heat related problems of heat cramps heat exhaustion heat stroke and prevention. A reprint of Free Flight Inchthe National Free Flight Society Digest.
* Heat cramps from loss of moisture and salt during sustained exercise. Drinking water and sodium chloride usually fixes symptoms.
* Heat Exhaustion is more common in older people who take diuretics and are exposed to stressing environmental conditions and physical activity.
* Exertional Heat Injury can come with exercise in high temperatures with inadequate conditioning.
* Heat Stroke or Sunstroke is common with elderly people. Symptoms are no sweating because of blood vessel constriction. Skin temperature may reach 112 F. The onset is preceded with nausea headache fainting. This is an EXTREME EMERGENCY. Remove clothing and use ice bath and hydrate with vigor.
Precautions include acclimatization. Red Flags: 90+° relative humidity above 60% no acclimatization occlusive clothing that insulates the body Pre-existing dehydration symptoms diuretics strenuous physical activity.
With dry weather in Seattle SASS members are enjoying Wednesday night flying at their 60 acre site.
Johns Pilatus B-4 is shown on front page and taken at 2002 International Gliderfestival in Fiss / Tirol Austria. The article starts on Pg 5. The article promotes the event to be held July 21-24 A small electric competition off water takes place on the village pond. URLs are given for more information. Great vacation opportunity with history and beautiful scenery
Radio Controlled Soaring Digest June 2005 Issue
