Patent SG-11201804922T-A (SG)
Title: Method and system for generating a set of values for respective ones of a set of parameters used in determining rotor blade profiles for a coaxial rotor system
Inventor: CHAN KEEN IAN
IPC: B64C27/10
Filed: 2015-12-09
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2017/099665 Al 15 June 2017 (15.06.2017) WIPO I PCT 111111111111110111011111111111010111110011101110111011111111111111111111111110111111 (51) International Patent Classification: B64C 27/10 (2006.01) (21) International Application Number: PCT/SG2015/050489 (22) International Filing Date: 9 December 2015 (09.12.2015) Filing Language: English Publication Language: English Applicant: SINGAPORE TECHNOLOGIES AEROSPACE LTD [SG/SG]; 540 Airport Road, Paya Le- bar, Singapore 539938 (SG). (72) Inventor: CHAN, Keen Ian; c/o Singapore Technologies Aerospace Ltd, 540 Airport Road, Paya Lebar, Singapore 539938 (SG). (74) Agent: VIERING, JENTSCHURA & PARTNER LLP; P.O. Box 1088, Rochor Post Office, Rochor Road, Singa- pore 911833 (SG). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: with international search report (Art. 21(3)) with amended claims (Art. 190)) (25) (26) (71) (54) Title: METHOD AND SYSTEM FOR GENERATING A SET OF VALUES FOR RESPECTIVE ONES OF A SET OF PARAMETERS USED IN DETERMINING ROTOR BLADE PROFILES FOR A COAXIAL ROTOR SYSTEM W O 20 17 /099665 Al 300 r j establishing a ratio of respective desired thrusts of an upper rotor and a lower rotor of the coaxial rotor based on a desired performance of the coaxial rotor determining the set of values of the set of parameters from the desired thrusts ratio based on a torque balance condition between the upper rotor and the lower rotor of the coaxial rotors FIG. 3 (57) : A method and system for generating a set of values for respective ones of a set of parameters used in de- termining rotor blade profiles for a coaxial rotor system. The method includes establishing (302) a ratio of respective de- sired thrusts of an upper rotor (102, 602) and a lower rotor (104, 604) of the coaxial rotor system based on a desired per- 302 formance of the coaxial rotor system, and determining (304) the set of values of the set of parameters from the desired thrusts ratio based on a torque balance condition between the upper rotor and the lower rotor of the coaxial rotor system. 304