Rayons vs AeroRadar

Rayons (spokes in French) accurately calculates the proper spoke length given a set of measurements that you provide. Hub and rim manufacturers may provide the measurements or you can measure them yourself. Detailed instructions are provided in the app. The app uses simple and accurate controls to input your measurements. The spoke length for your wheel set is displayed in real-time. You can save the calculation in the app as a wheel set by typing in a text field and giving it a name. Formula The spoke length formula used by the Rayons app has a set of limitations based on the mathematics and the nature of the drawings. The formula was designed for use on conventionally laced wheels with j-bend spokes. These types of wheels are most commonly custom made by hand. The limitations outlined here may not be all inclusive. A wheel has: An even number of spokes The same number of spokes on each side of the wheel Equal spacing between spoke holes, on the rim or the hub Spokes that are crossed in pairs on each side of the wheel which dictates a spoke count divisible by four App Minimum and Maximum Dimensions The Rayons app can be used to calculate spoke lengths for a variety of component types. This covers the majority of Road, Track, Mountain Bike, Touring, Tandem, Fat Bike, Downhill, Generator and Internally Geared wheels. At this time, the app is not recommended for use with E-Bike components. Check your component dimensions and compare them with this chart. Be sure the component dimensions are supported by the app. Read the Terms of Service for more information. All of the values are in millimeters. Front Hub Flange Diameter Minimum: 28 Front Hub Flange Diameter Maximum: 150 Front Hub Offset Minimum: 15 Front Hub Offset Maximum: 48 Rear Hub Flange Diameter Minimum: 35 Rear Hub Flange Diameter Maximum: 150 Rear Hub Left Offset Minimum: 20 Rear Hub Left Offset Maximum: 60 Rear Hub Right Offset Minimum: 10 Rear Hub Right Offset Maximum: 52 Hub Spoke Hole Diameter Minimum: 1.5 Hub Spoke Hole Diameter Maximum: 3.0 Effective Rim Diameter (ERD) Minimum: 300 Effective Rim Diameter (ERD) Maximum: 700 Rim Spoke Offset Minimum: 0.0 Rim Spoke Offset Maximum: 5.0 Fat Bike Rim Spoke Offset Minimum: 0.0 Fat Bike Rim Spoke Offset Maximum: 20.0 Counts Minimum Number of Spokes: 12 Maximum Number of Spokes: 48 Minimum Number of Crosses: 0 Maximum Number of Crosses: 4

AeroRadar is an observation radar for the air traffic around you, on the ground or in the air: ADS-B aircraft from the adsb.fi and adsb.lol community networks, FLARM gliders from the Open Glider Network, on a radar dial or on a map. It is not an aviation safety tool, and never an anti-collision system. THE SKY AROUND YOU • Live ADS-B traffic from adsb.fi and adsb.lol, queried together so their coverage adds up, a new picture at most every 5 seconds. • Ranges of 10, 25, 50 and 100 km on the dial, 250 km on the map, in kilometers or nautical miles. • Tap an aircraft for its registration, type, altitude, speed, heading and distance. Altitudes in meters then feet (3,353 m · 11,000 ft), speeds in km/h or knots. • Altitude filter: an adjustable ceiling from 500 to 30,000 ft, or none, and aircraft on the ground shown or hidden. • When a network call fails, the aircraft on screen stay, with the age of their data. DIAL AND MAP • A radar dial that puts you at the center, with four range rings, north-up or in Compass mode. • A map that puts the same traffic back on the terrain, with dashed heading vectors and labels. • Dark by default, light if you prefer. iPhone and iPad, portrait or landscape. • Energy saver refreshes every 10 seconds instead of 5: half the network wake-ups, and the radar stays active. TRAFFIC SOURCES • FLARM traffic (gliders, tow planes, hang gliders, paragliders) from the volunteer Open Glider Network, with distinct icons and GPS altitudes; an aircraft seen by both networks appears once. • Pilots who opted out of OGN tracking are never shown. • Each source has its colour: ADS-B, FLARM and radio beacons, pilots’ apps, computed MLAT positions. • FLARM, Apps and MLAT switch off one by one in Preferences. With FLARM and Apps off, the connection to the Open Glider Network closes. TRAFFIC OUTPUT • AeroRadar feeds the navigation app running on this same device as a FLARM-NMEA receiver on TCP port 2000 (host 127.0.0.1): nothing leaves the device. For any app that accepts a FLARM or NMEA source at an address of your choice. • Up to 32 targets per burst, closest first, never a position older than 30 seconds; the stream carries the traffic plus your own position. • While output is on, AeroRadar feeds your navigation app from the background and follows your aircraft, blue location indicator visible; with another app in front, the radar refreshes every 10 seconds. PRIVACY • No account, no ads, no analytics, no trackers, no third-party SDK, no in-app purchases. • Your approximate position, rounded to about 1 km, goes to adsb.fi, adsb.lol and, while the FLARM source or the Apps source is on, to the Open Glider Network, for one purpose only: selecting the traffic around you. Nothing identifies you or your device; the OGN login line names the app, the same for everyone. • Airline routes and some registrations come from adsbdb.com, asked by the aircraft’s callsign or address. • Receive-only by design: your position, or your aircraft’s, is never broadcast as a beacon visible to others. • Preferences stay on the device, and disappear with the app. • Data from adsb.fi, adsb.lol (ODbL license) and the Open Glider Network, for personal, non-commercial use. LIMITS • Community traffic from the internet: accuracy, completeness and continuity are not guaranteed. • An aircraft can be missing: out of receiver range, without a transponder, with ADS-B switched off, or hidden by your own filters. Low-flying helicopters are the hardest to hear. • ADS-B altitudes are pressure altitudes referenced to 1013.25 hPa, those of flight levels, not QNH-corrected altitudes. • Never use it to navigate, separate or avoid traffic, and never in IMC. • Your duty to “see and avoid” remains yours alone: stay vigilant at all times. Vigilance in flight remains the sole responsibility of the pilot in command. • The disclaimer is shown at every launch, and must be accepted every time.