Notes On Making A Tricopter Essay Example for Free

Notes On Making A Tricopter Essay Making a Quad- or Tri-copter is a project I’ve been tempted by for a long time. Ever since I got an RC heli, which I’ve since abandoned. The Heli was too hard to fly, and there wasn’t much motivation to persevere — having learned, all you can really do is aerobatics, which I’m not very interested in. A quad, on the other hand, is easier to fly and much more flexible: I could add cameras, sensors, telemetry, code it to do interesting things, etc. And lots of people have done this so it’s an easy thing to Google about. The tricopter seems the most appealing so far – interesting build, nice balance of stability and maneuverability. Interesting things so far: * Design considerations for beginners * Calculator to check if a given set of components will work together (looks awesome) * Arducopter – if I don’t have success coding an Arduino myself, or it’s too hard, or I want the features without all that work * UK-based Arducopter store * Useful FAQ on frame design, and some other bits * Video on building a tri from scratch * Complete build guide from the rcexplorer.se dude (v2.5) * And the next version along, v2.6 HV * Newbie FPV guide * Open-source plans for the RCExplorer frame * Discussion on various FC boards * The KK board is also an ATmega – I did not realise this. Lots of resources here. * A lot of tips and links on this RCGroups thread * Massive flight controller feature comparison table (possibly not up to date) * RCExplorer’s tricopter setup guide * Forum for UK-based FPVers * FPV advice/support/campaign group * Credible explanation of the CAA regulations covering model aircraft (with and without FPV) in the UK * Another explanation of frequencies and their legality, also from FPVUK * Good-looking set of videos about FPV theory and builds * Company selling uk-legal FPV gear, and it sounds like they’re helpful too I’ll update this post with more stuff. Design notes Frame I thought there would be maths (shuddder) about frame size vs prop size vs motor power and all that sort of thing, but this FAQ says the main considerations are maneuverability and stability. A smaller frame is more nimble but less stable, and vice versa. Since I’m a beginner, a larger, more stable frame seems like a good idea. It also seems plausible that it’s a better platform to develop from: I could perhaps add bigger motors/props to increase lift, for example, without having to change the frame. (Guess). The RCExplorer v2.6 arms are 480mm, which seems a good place to start. I think I’ll also use the frame design from RCExplorer as it’s well proven and designs are available. Some tips from this thread: * Prop wash over the arms causes vibration. Try to mount the props at least as far above the arms as the prop radius. * ESCs (unsurprisingly) work better if kept cool. Perhaps worth mounting them in the prop wash? Props Not much headway on this yet. RCExplorer (again!) recommends the smallest props you can as smaller props are lighter and have less air resistance, making them more stable. Trial and error seems a sensible approach here, as long as the prop doesn’t overwork the motor. Control board From this table, Arducopter seems both very functional and reasonably priced. Lots of resources for it too. Beyond (advanced) features (that I won’t need for ages, if ever), I still don’t have a clear idea what the pros and cons of the various boards are, though. For example, noob-friendliness, ease of repairs. The KK board does have a screen to guide you through the process, which might make it preferable to start with. And it’s cheap, so easy enough to replace with something more feature-rich later. ESCs There are so many important bits of information in the big tips thread that it’s not really worth reproducing them here. Just go read it. Use NiMH mode even for a LiPo battery, because the low-voltage mode engaging (to protect the LiPo) causes flips (eek). Motors RCExplorer uses these for the v2.5. Mentioned elsewhere too. Is 750kV enough? What are the considerations? Batteries TBC Video Not planning to do this immediately, but from reading so far, there is stuff worth noting. Apparently, the only legal frequencies for airborne video tx in the UK are 2.4 and 5.8GHz. These are very short wavelengths with poor penetration and are limited to 10mw and 25mw respectively. This sounds totally dreadful, but people do claim that they can get decent range (up to a mile) with a high-gain antenna. A significant number of other people are (unsurprisingly) completely flouting the law. It does seem a bit OTT. Obtaining an amateur radio licence makes no difference as they do not include airborne transmissions (out of date but probably still accurate: Amateur Radio (Foundation) Licence Terms, Provisions and Limitations Booklet BR68/F, para 2(6)). Possible exception: higher power 5.8GHz transmitters at 250mw rather than 25mw. It seems that to stay legal you can only use 2.4GHz or 5.8GHz. My transmitter is 2.4GHz and I don’t want to replace that with an (obsolete) 35MHz transmitter. So it seems it’s 5.8GHz or bust. Telemetry, sensors I’ll think about these later. Transmission of telemetry data is permitted on 433.05 to 434.79MHz up to 10mw.

The Awakening Essay -- essays research papers fc

The Relationship of The Awakening and Creole Society In The Awakening, Kate Chopin brings out the essence of through the characters of her novel. In this novel Edna Pontellier faces many problems because she is an outcast from society. As a result of her isolation from society she has to learn to fit in and deal with her problems. This situation causes her to go through a series of awakenings that help her find herself, but this also causes problems with her husband because she loses respect for him and the society she lives in. Throughout the novel she is faced with unfavorable circumstances which confuse and eventually kill her. Kate Chopin uses Creole Society in the 1890s as a basis for her novel and expresses it through Creole women, personal relationships, and etiquette. The Awakening is a book based on French Creoles and their lifestyle which is expressed throughout the novel. Creoles were French Creole Society descendents of French and Spanish Colonists of the 1700s. They had strong family ties because of Catholicism and were a tight community because they where considered outcasts of Anglo- American society. Clement Eaton says that "the Creoles, to a greater degree then Anglo-Americans, lived a life of sensation and careless enjoyment. They loved to dance, gamble, fish, attend feasts, play on the fiddle and to live without much thought of the morrow." Eaton 252 Creoles were very lively outgoing people because of their comfortable tight society. Activities such as Mardi Gras and Sunday afternoon Mass holiday spirits contribute the liveliness of these people (Walker 252). A large reason for their comfort and "live for the moment" attitude was that Creoles did not move west like most other colonists to claim land. Instead they stayed in relatively the same area and just grew in population without consumption of other lands . This caused a shortage of land so it had to be repeatedly divided among the families and it also made it difficult for the plantation system to operate successfully (Walker 253). Background of Creoles: Until 1888 the husband was legal guardian and was given custody of the children when in a divorce. In the 1890 segregation was legalized (Jim Crow laws), but blacks horizons were expanding also. "In Louisiana after the Civil War, African American men had voted in lar... ... of the Old South. Ed. Albert D. Kirwan. Lexington: U of Kentucky P, 1968. 83. Qtd. in Walker, 252. Shaffter, Mary L. "Creole Women." The Chatauquan 15 (1982) : 346-347. Rpt. in "The Awakening": An Authoritative Text. Ed. Margo Culley. New York: Norton, 1994. 137-139. Walker, Nancy. "Feminist or Naturalist?" The Social Context of Kate Chopin’s The Awakening. 17(1979) : 95-103. Rpt. in "The Awakening" : An Authoritative Text. Ed. Margo Culley. New York: Norton, 1994. 137-139. Wells, Richard A. "An Etiquette Advice Book Sampler." Decorum: A Practical Treatise on Etiquette and Dress of the Best American Society. (1886): 248-49. Rpt. in "The Awakening": An Authoritative Text. Ed. Margo Culley. New York: Norton, 1994.122-125. Young, John H. "An Etiquette Advice Book Sampler." Our Deportment, Or the Manners, Conduct and Dress of the Most Refined Society. (1882): 56. Rpt. in "The Awakening": An Authoritative Text. Ed. Margo Culley. New York: Norton, 1994. 122-125.

The Great Navigator Columbus

The great navigator Columbus Mr. Christopher Columbus (1451-1506) navigator Spain famous and pioneering major geographical discoveries in human history. He was in his youth believer in the theory of spherical Earth and not leading the famous Marco Polo every respect and appreciation, and the determination to become a navigator. During the period between the year 1492 and in 1502 crossed the Atlantic Ocean four times and discovered the American continent and became a great crew in the history of the world.Columbus Italy and had a passion for navigation and exploration since he was young and looked forward to traveling to China and India. And has repeatedly asked the Portuguese and Spanish kings and the British and French to help him do a cruise to the west until it reaches to the eastern states, but they rejected the plan because the spherical earth theory were not complete and convincing in those days. He spent more than ten years trying to convince people to help him implement his n avigational plan.In 1492 the queen of Spain with the help of satisfied Columbus financially the implementation of the plan. In September 1492 launched Columbus' fleet of three ships and 87 crew from Europe to the west, hoping to reach Asia in the end. A month after the fleet arrived at the dry ground, and Columbus and his men think Columbus and his men, it is the land of Asia, told the audience in Europe that they have arrived in India. Thus Columbus discovered the American continent without being aware of the fact discovered.This trip changed the great process of the evolution of the history of the world, and turned the World Trade Center from the Mediterranean Sea to the west shore of the Atlantic Ocean. In the following centuries, modern industrial civilization has become a new trend of the evolution of the global economy. The United States identified in 1792 on the 12th of October or the first two second-day of October each year, â€Å"Columbus Day†. In this day every yea r organizes most U. S. states many festive activities on the occasion of the anniversary of Columbus' discovery of the Americas.

Dont Make This Mistake in French Je Suis 25 Ans

If you are 25 years old  and someone asks you in French how old you are, you respond:  Jai 25 ans (I am 25 years old).  Using the verb avoir (to have)  for age is the idiom, and to respond using the verb à ªtre (Je suis 25 ans) is nonsense to the French ear.  Ã‚   The French translation of to be is à ªtre. However, a lot of English expressions with to be are equivalent to French expressions with avoir (to have). To be ___ (years old) is one of these expressions: I am 25 (years old) is not Je suis 25 or Je suis 25 ans, but rather Jai 25 ans. This is just something you have to memorize, along with Jai chaud (Im hot), Jai faim (Im hungry), and many more expressions with avoir. Note also that the word ans (years) is required in French. In English you can just say Im 25,but that does not happen in French. Plus, the number is always written as a numeral, never as a word. Other Expressions of Age à   trois ans  Ã‚  at three (years of age)On fà ªte ses vingt ans. Were celebrating his twentieth birthday.un enfant de cinq ans  Ã‚  a five-year-old childretraite à   60 retirement at the age of 60moins de 26 ans younger than 26Anne Jones, 12 ans Anne Jones, age 12les enfants de 3 à   13  ans children ages 3 to 13Le groupe tà ©moin a comportà © 30 sujets, à ¢ge moyen de 56,9 ans.  Ã‚  The control group consisted of 30 healthy individuals, mean  age  56.9.à ¢gà © de plus de 18  ans older than 18 / 18 years of ageJai une excellente bouteille dOban  18 ans dà ¢ge  dans mon bureau.  Ã‚  I have an excellent bottle of  18-year-old  Oban in my office.La principale à ©tude comprenait environ 19,000 femmes à ¢gà ©es de 15 à   25  ans.   The main study involved almost 19,000 women from  15 to  25. More Idiomatic Expressions with Avoir avoir à  Ã‚  Ã‚   infinitive  Ã‚  to have to do somethingavoir besoin de   to needavoir chaud   to be hotavoir confiance en   to trustavoir de la chance   to be luckyavoir du charme   to have charmavoir du chien  (informal)  Ã‚  to be attractive, have a certain somethingavoir du pain sur la planche  (informal)  Ã‚  to have a lot to do, have a lot on ones plateavoir du pot  (informal)  Ã‚  to be luckyavoir envie de   to want  toavoir faim   to be hungryavoir froid   to be coldavoir honte de   to be ashamed of/aboutavoir horreur de   to detest/loatheavoir lair (de)  Ã‚  to look (like)avoir la frite  Ã‚  to feel greatavoir la gueule de bois  Ã‚  to have a hangover, to be hungoveravoir la patate   to feel greatavoir le beurre et largent du beurre  Ã‚  to have ones cake and eat it tooavoir le cafard  (informal)  Ã‚  to feel low/blue/down in the dumpsavoir lesprit de lescalier  Ã‚  to be unable to think of witty comebacks in timeavoir le fou rire   to have the gigglesavoir le mal de mer   to be seasickavoir les chevilles qui enflent  (informal)  Ã‚  to be full of oneselfavoir lhabitude de   to be used to, in the habit ofavoir lheure   to have (know) the timeavoir lieu   to take placeavoir lintention de   to intend/plan toavoir mal à   la tà ªte, aux yeux, à   lestomac   to have a headache, eye pain, stomachacheavoir mal au cÅ“ur   to be sick to ones stomachavoir peur de   to be afraidavoir raison   to be rightavoir soif   to be thirstyavoir sommeil   to be sleepyavoir tort   to be wrong Additional Resources Avoir, Être, FaireExpressions with avoirExpressions with à ªtre