Design of a Foiling Optimist
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NASA Supercritical Airfoils
NASA Technical Paper 2969 1990 NASA Supercritical Airfoils A Matrix of Family-Related Airfoils Charles D. Harris Langley Research Center Hampton, Virginia National Aeronautics-and Space Administration Office of Management Scientific and Technical Information Division Summary wind-tunnel testing. The process consisted of eval- A concerted effort within the National Aero- uating experimental pressure distributions at design and off-design conditions and physically altering the nautics and Space Administration (NASA) during airfoil profiles to yield the best drag characteristics the 1960's and 1970's was directed toward develop- over a range of experimental test conditions. ing practical two-dimensional turbulent airfoils with The insight gained and the design guidelines that good transonic behavior while retaining acceptable were recognized during these early phase 1 investiga- low-speed characteristics and focused on a concept tions, together with transonic, viscous, airfoil anal- referred to as the supercritical airfoil. This dis- ysis codes developed during the same time period, tinctive airfoil shape, based on the concept of local resulted in the design of a matrix of family-related supersonic flow with isentropic recompression, was supercritical airfoils (denoted by the SC(phase 2) characterized by a large leading-edge radius, reduced prefix). curvature over the middle region of the upper surface, and substantial aft camber. The purpose of this report is to summarize the This report summarizes the supercritical airfoil background of the NASA supercritical airfoil devel- development program in a chronological fashion, dis- opment, to discuss some of the airfoil design guide- lines, and to present coordinates of a matrix of cusses some of the design guidelines, and presents family-related supercritical airfoils with thicknesses coordinates of a matrix of family-related super- critical airfoils with thicknesses from 2 to 18 percent from 2 to 18 percent and design lift coefficients from and design lift coefficients from 0 to 1.0. -
Hydrofoil, Rudder, and Strut Design Issues
International Hydrofoil Society Correspondence Archives... Hydrofoil, Rudder, and Strut Design Issues (See also links to design texts and other technical information sources on the IHS Links Page) (Last Update: 11 Nov 03) Return to the Archived Messages Contents Page To search current messages, go to the Automated BBS Correspondence Where is Foil Design Data? [11 May 03] Where do I go for specifics about foil design? As in how do I determine the size, aspect ratio, need for winglets, shape, (inverted T vs. inverted Y vs. horizontal V), NASA foil specification . My plan calls for a single foil fully submerged with all control being accomplished with above water airfoils (pitch, roll, direction). Everything above water is conceptually set, but I have limited understanding / knowledge about foils. I understand that there are arrangements combining a lower speed and higher speed foil on the same vertical column, with some type of grooving on the higher speed foil to prevent cavitation at limited angles of attack. With respect to the website http://www.supramar.ch/ there is an article on grooving to avoid cavitation. I anticipate a limited wave surface (off shore wind) so elevation could be limited, and the initial lifting foil would be unlikely to be exposed to resubmersion at speed. Supramar is willing to guide/specify the grooving at no charge, but I need a foil design for their review or at least that seems to be the situation. I have not actually asked for a design proposal. Maybe I should. Actually it is hard to know if my request would even be taken seriously. -
Southport Yacht Club Sailing @ Southport Yacht Club
SOUTHPORT YACHT CLUB NEWS / INFO Issue Number 29 Summer 2012 / 2013 INFUSION WORLD CHAMPIONSHIPS NACRA AT SYC - HOLLYWELL FESTIVE YC S SEASON 1ST dec - 28TH feb Hardstand Refi t Bays Specialist Workshops Retail Factories Specialist Workshops Main Entrance Southport Yacht Club Gold Members can now save 5% on their boat works. n the heart of the Gold Coast Marine of the partnership between SYC and The BOAT YARD SERVICES Precinct is The Boat Works. Boat Works. All Gold Members can now save Boat Lifting | Shipwrights | Painters As the name suggests, you get The 5% on all service charges relating to haul I out and return to water, barnacle scrapping, Antifouling | Slipway | Engineers Works: there’s nothing that can’t be carried out here. And excellently. waterblasting, hardstand and refit bay charges. The name also suggests the level of The full menu of The Boat Works’s services MARINA & REFIT FACILITIES reassurance boat owners gain from this are listed below. But we should highlight some world-class facility. stand-out advantages: Refi t Bays | Storage Options Stretching over 9.2 hectares of sheltered Our modern facility offers 30 work berths Marina Berths | Hardstand Coomera riverfront, The Boat Works is a full for vessels up to 25m. The covered refit bays take boats up to 24m. service and refit yard, offering businesslike BUSINESS OPPORTUNITIES marine service to pleasure boaters. There are 17,000 square metres of Here you’ll find an enthusiastic crew and hardstand, maintenance and service areas; a Retail Factories | Leasing Opportunities first grade facilities. travelift that can lift up to 70- tonners; plus unique hydraulic trolleys that can lift wider You will also find economical rates courtesy cats, tris, barges and houseboats. -
Design and Computational Analysis of Winglets
Turkish Journal of Computer and Mathematics Education Vol.12 No.7 (2021), 1-9 Research Article Design and Computational Analysis of Winglets V.Madhanraj(1), Kaka Ganesh Chandra(2), Desineni Swprazeeth(3) , Battina Dhanush Gopal(4), Hindustan Institute of Technology and Science, Padur, Chennai. Article History: Received: 10 January 2021; Revised: 12 February 2021; Accepted: 27 March 2021; Published online: 16 April 2021 Abstract: The primary goal of this project is to learn and analyse the aerodynamic performance of wings and various types of winglets and wingtip devices. The objective of this study is to improve a model for various types of winglets and wingtip devices using the software SOLIDWORKS, And Fluent Analysis using the software ANSYS. The best performing aerofoil in terms of aerodynamic efficiency, NACA 64-215, was chosen for wing construction. A wing which is without winglets was simulated, followed by a wing with various winglets at different Cant angles. To determine the aerodynamic efficiency, a wing with a blended winglet and a raked winglet was simulated. In order to found a more efficient wing with winglets, designs of Blended and Raked winglets are modified, and comparison of the performance of winglets by varying with different cant angles, 30° and 60° were performed. As a result of this work, it was concluded that adding a winglet to a wing increases its aerodynamic efficiency in terms of CL/CD. Keywords: Winglets, Wingtip Devices, Blended Winglet, Raked Winglet, Lift, Drag, Vorticity, Co-efficient of Lift, Co- efficient of Drag 1.1 Introduction to Winglets Current global environmental issues such as rising aviation fuel costs and global warming have forced airlines to make adjustments. -
Human Powered Hydrofoil Design & Analytic Wing Optimization
Human Powered Hydrofoil Design & Analytic Wing Optimization Andy Gunkler and Dr. C. Mark Archibald Grove City College Grove City, PA 16127 Email: [email protected] Abstract – Human powered hydrofoil watercraft can have marked performance advantages over displacement-hull craft, but pose significant engineering challenges. The focus of this hydrofoil independent research project was two-fold. First of all, a general vehicle configuration was developed. Secondly, a thorough optimization process was developed for designing lifting foils that are highly efficient over a wide range of speeds. Given a well-defined set of design specifications, such as vehicle weight and desired top speed, an optimal horizontal, non-surface- piercing wing can be engineered. Design variables include foil span, area, planform shape, and airfoil cross section. The optimization begins with analytical expressions of hydrodynamic characteristics such as lift, profile drag, induced drag, surface wave drag, and interference drag. Research of optimization processes developed in the past illuminated instances in which coefficients of lift and drag were assumed to be constant. These shortcuts, made presumably for the sake of simplicity, lead to grossly erroneous regions of calculated drag. The optimization process developed for this study more accurately computes profile drag forces by making use of a variable coefficient of drag which, was found to be a function of the characteristic Reynolds number, required coefficient of lift, and airfoil section. At the desired cruising speed, total drag is minimized while lift is maximized. Next, a strength and rigidity analysis of the foil eliminates designs for which the hydrodynamic parameters produce structurally unsound wings. Incorporating constraints on minimum takeoff speed and power required to stay foil-borne isolates a set of optimized design parameters. -
Page 1 of 6 2020 MIAMI SAILING WEEK March 4
2020 MIAMI SAILING WEEK March 4 – 15, 2020 NOTICE OF RACE (This Notice of Race may be amended from time to time pursuant to RRS 89.2b) 1. ORGANIZING AUTHORITY 1.1. The Organizing Authority is the Coconut Grove Sailing Club, Miami, FL 2. CO-HOSTS 2.1. Miami Sailing Week and the Coconut Grove Sailing Club (CGSC) are co-hosts 3. RULES 3.1. This regatta will be governed by the rules as defined in The Racing Rules Of Sailing (RRS 2017- 2020) 3.2. This regatta will comply with the RRS 2017-2020 and any class rules that may apply. 3.3. Bow numbers may be assigned by the race committee and given to each participating boat at registration. They shall be affixed to the hull according to the instructions provided by the OA 4. ADVERTISING 4.1. The OA may require that all participating boats display sponsor flags and/or stickers. 5. ELIGIBILITY AND ENTRY 5.1. Miami Sailing Week (MSW) is open to the following classes and divisions that meet their obligations of their Class Rules and their National Authority, including current membership 5.1.1. A- Class Catamaran Foiling and Classic 5.1.2. Optimist Championship (Red, White, and Blue) Fleet 5.1.3. Optimist Green Fleet 5.1.4. Laser 4.7 5.1.5. Laser Radial 5.1.6. Laser Standard 5.1.7. International 420 5.1.8. Club 420 5.1.9. Flying Scot 5.1.10. Finn 5.2. Eligible Boats may enter by completing the online entry form at www.miamisailingweek.com Page 1 of 6 5.3. -
JUNIOR SAILING PROGRAM Optimist, Pixel, C420, Laser
Pequot Yacht Club JUNIOR SAILING PROGRAM A Guide for Participants, Parents & Instructors Optimist, Pixel, C420, Laser 2014 PEQUOT YACHT CLUB JUNIOR SAILING PROGRAM TABLE OF CONTENTS Welcome Letter Page 3 Important Contact Information & Junior Committee Page 4 2014 Important Dates Page 5 Program Overview Page 6 Safety Page 8 Communication, Class Attendance & Equipment Page 12 Discipline Page 13 Regattas Page 14 Lunch Page 15 Junior Sailing Association of Long Island Sound Page 16 Traditions Page 17 Volunteering Junior Clubhouse Commissioning Annual Awards Dinner Jennings Cup Parent-Child Regatta & Sunset Sails Pequot-hosted Regattas Opti Rumble Pixel Invitational Junior Program Rules Page 18 Pequot Junior Trophies Page 19 JSA Annual Awards Page 20 JSA of LIS Eligibility Requirements Page 21 Optimist, Pixel & 420 Checklists and Other Useful Information Page 22 2 WELCOME LETTER Welcome new and returning sailors to the Pequot Yacht Club’s Junior Sailing Program! This guide is your reference for all information related to TEAM PEQUOT. Our practices and policies foster a supportive environment for running a safe, fun, and educational Junior Sailing Program. The common ground upon which we base our program is our mission statement: The Pequot Junior Sailing Program teaches young sailors the essential elements of performance boat handling, seamanship, and racing skills. It instills in them a respect for the sea and the value of teamwork, cooperative learning and good sportsmanship. Most importantly, the Pequot Junior Program creates sailors who will enjoy and contribute to the sport of sailing for their entire lives. TEAM PEQUOT is our club culture which emphasizes the importance of teamwork and cooperative learning. -
Introduction to the Championship
Introduction to the Championship Optimist Fleet at CGSC The Optimist is the world’s most popular youth sailing trainer in existence with over 150,000 vessels registered with the class association. The Optimist is sailed in over 120 countries and it is one of only two dinghies approved by World Sailing exclusively for sailors under 16 years of age. At the London Olympics in 2012, 80% of all boat skippers were former Optimist sailors, most of them having reached international level in the Class. So congratulations! You are part of a rich and great international tradition here at CGSC, and you have a lot to look forward to stepping into the competitive world of Optimist Racing. But first, what is the Championship Fleet at CGSC? Red, White, and Blue Explained Within the Optimist Circuit, the competitors are divided in Fleet Racing (more on that later) by age into three divisions. Sailors fall into the different fleets based on age, not skill level White 10 years old or under Blue 11 to 12 years old Red 13 to 15 years old In the United States the Optimist Class is overseen by the USODA (United States Optimist Dinghy Association) and they host sanctioned regattas all over the United States (USODA Qualifiers). Our ultimate goal in the CGSC Championship Optimist Fleet is to qualify for the World Championship one day. It is the highest honor an Optimist sailor can receive, and only 5 sailors are allowed into the Worlds per country. CGSC has the distinction of being the only club to send almost all the sailors representing the US two years in a row! (1984 and 1985 optimist worlds) so the potential for success in Optimist Racing is there. -
Roll of Champions
CVLSC Roll of Champions Nov-16 Event Year Champion Feb Class Race Day - Laser 2016 Phil Pattullo Frostbite AM - Laser 2016 Phil Pattullo May Class Race Day - Laser 2016 Phil Pattullo Spring Points - Laser 2016 Phil Pattullo Autumn Points AM - Laser 2016 Phil Pattullo Mercury Trophy 35 - 44 yrs 2016 Phil Pattullo - Laser Frostbite AM - Flying Fifteen 2016 Bill Chard & Ken Comrie Frostbite PM - Flying Fifteen 2016 Bill Chard & Ken Comrie Early Summer Points AM - Flying Fifteen 2016 Bill Chard & Ken Comrie August Class Race Day - Flying Fifteen 2016 Bill Chard & Ken Comrie Autumn Points AM - Flying Fifteen 2016 Bill Chard & Ken Comrie Frostbite AM - A Handicap 2016 Steve Jones & Andy Harris - RS400 May Class Race Day - A Handicap 2016 Steve Jones & Andy Harris - RS400 Summer Regatta - A Handicap 2016 Steve Jones & Andy Harris - RS400 Admirals Chase 2016 Steve Jones & Andy Harris - RS400 Winter Points - A Handicap 2015 Steve Jones & Andy Harris - RS400 Early Summer Points AM - Solo 2016 Alex Timms Early Summer Points PM - Solo 2016 Alex Timms Summer Points - Solo 2016 Alex Timms August Class Race Day - Solo 2016 Alex Timms Feb Class Race Day - A Handicap 2016 Chris Goldhawk - RS100 Early Summer Points PM - A Handicap 2016 Chris Goldhawk - RS100 Marshall Trophy 2016 Chris Goldhawk - RS100 Summer Points - A Handicap 2016 Chris Goldhawk - RS100 Spring Points - A Handicap 2016 Andy Jones - RS100 Early Summer Points AM - A Handicap 2016 Andy Jones - RS100 Macklin Trophy 45 - 54 yrs 2016 Andy Jones - RS100 Feb Class Race Day - Flying Fifteen 2016 -
Deutsche Meisterschaften Und Platzierte 2009
Deutsche Meisterschaften und Platzierte 2009 Bootsklasse Platz Mannschaft Verein DSV-Nr. IDM 15 qm 1. Wilfried Schweer / Bernd Koy STSV N048 03.08.-07.08. 15 qm 2. Michael Hotho / Hugo Dölfes SCP BA077 15 qm 3. Jan Hustert / Morten Häger SCD N061 15 qm 4. Andreas Zethner / Erich Zethner Österreich 15 qm 5. Thomas Budde / Uwe Bertallot SVH N062 15 qm 6. Robert Heymann / Thomas Schüler MSVB BG020 DM 20 qm 1. Thomas Flach / Sven Diedering / Harald Schaale BTB B121 06.09.-11.09 20 qm 2. Christian Friedrich / Friedrich Göing / Matthias Schönfelder SVUH B030 20 qm 3. Florian Stock / Stefan Seifert / Tobias Barthel ARV08 SA034 20 qm 4. Lucas Zellmer / Michael Wiedstruck / Bernd Muschke SPYC B023 20 qm 5. Jörg Witte / Stepha Mädicke / Martin Herbst TSG B100 20 qm 6. Kay-Uwe Lüdtke / Karsten Schulz / Carsten Sumpf YCBG B120 DM 29er 1. Philipp Müller / Moritz Janich HSC BA016 09.10.-11.10. 29er 2. Simon Winter / Kilian Holzapfel SRV BA075 29er 3. Karin Marchart / Tina Marchart YCaT BA036 29er 4. Justus Schmidt / Max Böhme KYC SH017 29er 5. Jule Görge / Lotta Görge KYC SH017 29er 6. Stefan Gieser / Felix Meggendorfer WHW BW078 IDM 49er keine DM 11.06.-14.06. IDM 420er 1. Julian Autenrieth / Philipp Autenrieth BYC BA001 09.10.-13.10. 420er 2. Frederike Loewe / Anna Rattemeyer SVR B116 420er 3. Till Krüger / Oliver Wichert MSC HA033 420er 4. Jan Schliemann / Aaron Scherr YCRA BW003 420er 5. Malte Winkel / Lucas Thielemann SYC MV004 420er 6. Gordon Nickel / Daniel-Philip Hoffmann SVC N005 IDM 470er 1. Lucas Zellmer / Heiko Seelig SPYC B023 29.09.-04.10. -
International Moth Class Rules
International Moth Class Rules Authority: International Sailing Federation Ariadne House, Town Quay, Southampton, Hampshire, SO14 2AQ. United Kingdom Date of International Status: 1st September 1972 Previous Revision: 22nd March 2013 Effective Date: 1st March 2015 (to be confirmed with ISAF) Section A: Administration 1 General 1.1 The International Moth is a single-handed development class boat, and these rules are open class rules. The intention of these rules is to give the designer and builder the fullest liberty in design and construction, within these rules to develop and produce faster boats. 1.2 The official language of the class is English and in the event of a dispute over translation, the English text shall prevail. 1.3 These rules are complementary to the measurement form. The International Moth Class Association (IMCA) may issue interpretations, which must be ratified by the ISAF before coming effective. 1.4 In the event of discrepancy between the rules and the measurement form, the matter shall be referred to the IMCA and ISAF. 1.5 In countries where there is no National Authority, or where the National Authority does not wish to administer the class, its function as stated in the rules, shall be carried out by IMCA or its delegated representatives (National Associations). 1.6 Neither the ISAF or the IMCA accept legal responsibility in respect of the rules, or any claim rising therefrom. 2 International Class Fee 2.1 The International Class Fee (ICF) shall be made up of three parts: Part A due to ISAF which is set by agreement between ISAF and the IMCA World Secretary based on 0.5% of the average cost of a new boat ready to sail, taken over the World fleets whether made privately or professionally. -
Sunday Session Spring 2019 at Dabchicks Sailing Club 2019
6/2/2019 Sailwave results for Sunday Session Spring 2019 at Dabchicks Sailing Club 2019 Sunday Session Spring 2019 Dabchicks Sailing Club Results are provisional as of 16:07 on June 2, 2019 Overall Sailed: 3, Discards: 0, To count: 3, Rating system: PY, Entries: 25, Scoring system: Appendix A Rank Class SailNo HelmName CrewName PY Spring 1 Spring 2 Spring 3 Total Nett 5/5/2018 20th May 02/06/2019 14:30 14.30 14:30 1st OPTIMIST 6483 Sam Grout 1642 3.0 7.0 12.0 22.0 22.0 2nd EUROPE 323 Toby 1141 2.0 26.0 DNC 2.0 30.0 30.0 Ramsay 3rd LASER 210233 Alex 1099 26.0 DNC 6.0 7.0 39.0 39.0 Thomson 4th OPTIMIST 5587 James 1642 26.0 DNC 9.0 15.0 50.0 50.0 Matthews 5th RS AERO 5 1108 Charlie 1136 26.0 DNC 26.0 DNC 1.0 53.0 53.0 Pearce 6th LASER RADIAL 102698 Simon 1145 26.0 DNC 1.0 26.0 DNC 53.0 53.0 Clifton 7th LASER 176359 Will Powell 1099 1.0 26.0 DNC 26.0 DNS 53.0 53.0 8th RS 500 506 Richard Sue Green 963 26.0 DNC 2.0 26.0 DNF 54.0 54.0 Green 9th SOLO 5378 Julian Lord 1143 26.0 DNC 26.0 DNC 3.0 55.0 55.0 10th LASER 4.7 179860 Maddie 1207 26.0 DNC 3.0 26.0 DNC 55.0 55.0 Clifton 11th LASER 4.7 183557 Charlie 1207 26.0 DNC 26.0 DNC 4.0 56.0 56.0 Brown 12th SOLO 4431 Andrew 1143 26.0 DNC 4.0 26.0 DNC 56.0 56.0 Stebbing 13th ENTERPRISE 23049 Brian Linda 1119 26.0 DNC 26.0 DNC 5.0 57.0 57.0 Cumming Cumming 14th MERLIN-ROCKET - 17 Jonathan 1040 26.0 DNC 5.0 26.0 DNC 57.0 57.0 Vintage circa 1965 Reubin 15th LASER 4.7 176530 Lucy Milgate Matilda 1207 26.0 DNC 26.0 DNC 6.0 58.0 58.0 Milgate 16th RS 400 597 Tony Brown Rosie 942 26.0 DNC 26.0 DNC 8.0 60.0