Aerospace Community
Home
Chat
Blog
Spotting
Flights
Finance
Toolbox
Knowledge
Community
Database
Machine Learning
Register
Login
This site uses technologies such as cookies for analytics and personalized content. By continuing to browse this site, you agree to this use. See our Privacy Policy to read more.
Learn More
Accept
Aircrafts
Aerostats
Aircrafts
AircraftTypes
AircraftWeightVariants
Airplanes
ETOPSRatings
Gliders
Harness
Paragliders
RescueParachutes
Rotorcrafts
WakeCategories
Airfield
AirfieldLounges
AirfieldOperationReports
AirfieldOperators
Airports
FreeFlightFields
Heliports
Runways
Airline
Airlines
CabinClass
Blog
BlogArticleBlogArticleTags
BlogArticleCategories
BlogArticles
BlogArticleTags
Company
AircraftEngineManufacturers
AircraftLessors
AircraftManufacturers
Companies
CompanyFinancialReports
CompanyManagements
CompanyRegisters
CompanyShareholders
CompanySites
CompanySocialMedias
CompanyTypes
CreditRatingAgencies
FinancialMarketOperators
Engines
AircraftEngines
AircraftEngineTypes
ElectricMotors
PistonEngines
Propellers
ReactionTurbines
Turbines
Finance
AircraftDeals
Bonds
Commodities
ContractTypes
CountryCreditRatings
CreditRatingAgencyRatings
Currencies
CurrencyExchanges
EconomicReports
ETFs
FinancialIndexComponents
FinancialIndexs
FinancialMarkets
FinancialSymbols
FinancialValues
Funds
Futures
GICSSectors
OfficialCurrencies
Options
OrderStatus
Repos
Stocks
Geography
AviationAgencies
Beacons
Cities
CityCensus
Countries
CountryCensus
CountrySubdivisions
OfficialLanguages
WorldRegions
WorldSubRegions
Operations
AirlineAllianceMemberships
AirlineAlliances
AirlineBases
AirlineFrequentFlyerPrograms
Flights
FrequentFlyerPrograms
Ratings
AircraftEngineRatings
AircraftRatings
AirfieldLoungeRatings
AirfieldRatings
AirlineAllianceRatings
AirlineRatings
BlogArticleRatings
CompanyRatings
FileRatings
FlightReportRatings
FreeFlightFieldRatings
FrequentFlyerProgramRatings
Ratings
Safety
AirlineAirRestrictions
AirSafetyEvents
CountryAirRestrictions
Science
AstronomicalBodies
AstronomicalBodyTypes
ChemicalElements
ChemicalProperties
Constants
Conversions
CoordinateSystems
CrystallographicStructures
GeographicCoordinateSystems
GeometricalCharacteristics
Materials
Molecules
MorseCodes
QCodes
Quantities
RadioBands
RadioFrequencies
StandardAtmosphereLayers
StandardAtmospheres
UnitPrefixs
UnitQuantities
Units
UnitSystems
Compare geometrical characteristics
All geometrical characteristics
Roundness
✕
Specification
Form
Symbol
Roundness.svg
Unicode character
U+25CB
Datum needed
No