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new book: RCadvisor's ModiFly

How does an original model airplane design get created?I've always wanted to read a book that answered that question. A book that takes me by the hand and shows me how it's really done. One that tells me not just the what and the how, but also the all important why. Since nobody had ever written such a book, I decided I had to do it myself. This is that book.Experience firsthand the joys of building and flying your very own model airplane design. Put into practice the lessons from my previous book, RCadvisor's Model Airplane Design Made Easy. Follow along as we design, build, and fly a modern radio-controlled model airplane.DESIGN GOALSIncorporating the latest innovations and research results, the design is deceptively simple in appearance. However, 20 prototypes and 15 hours of flight testing were required before a design finally met all the goals:* Build it in just one day for less than $5.* A joy to fly with no bad habits.* Sturdy enough to survive hard landings.* Build either a park flyer or an indoor slow flyer.* New pilots can fly it without ailerons.* Easy to build for new scratch builders.* Kid-friendly free flight glider version.* Use inexpensive electric power systems and radio gear.* Great starting point for your own unique designs.You can easily find the construction materials for the airplane at local discount or craft stores. So what are you waiting for?DESIGN PROCESSThe book starts by describing the goals and the long prototyping process that led to the final design. Along the way you get to see firsthand the challenges that creating an innovative design presents. Learn the reasoning behind all the decisions that led to this unique design.A stand-alone book, it is complemented nicely by RCadvisor's online model airplane calculator and my first model airplane design book. Picking up where that book left off, it takes a very pragmatic approach to the entire design process.ADVANCE PRAISE"This is absolutely A MUST READ!" - Bob Aberle"I am so excited about the design that I just have to build one to try it out." - Ken Myers"Carlos kicks out another winner with this one." - Jamie Burke"Even if you have some model airplane design experience, you are likely to learn something from this book. I know I did." - Paul Bradley"Carlos Reyes has done it again!" - Richard Kline"Lots of great info!" - Michael "Crash" Hancock"Carlos' latest book is like a well written mystery novel." - Red ScholefieldSPECIAL OFFERThe book is just $19.95. That is a lot less than the price of a new kit! As a bonus, I'm including a *free* six month subscription to the premium features of the calculator. That is a $12 value! This subscription unlocks the optimizer and all the other advanced calculator features. Current subscribers can extend their subscription for another six months with this offer.FLIGHT PACKAs a service to the RCadvisor community, I'm making available flight packs suitable for the model described in the book. These are the same high quality components I used in all my flight testing:* HXT 5 gram micro servos (4 each)* Flightmax 500 mAh 2S1P 20C LiPo battery packs (2 each)* Turnigy 10A speed controller* Turnigy 24 gram brushless outrunner motor* Slow flyer 8x3.8 propeller* Prop saver and other connectorsThe price is just $74.95, a real bargain. Bonus: for a limited time, I'm adding an extra propeller for a total of two.BONUS STICKERSWhile supplies last, I'm throwing in free high quality vinyl stickers with every order. They are three-inch high copies of the RCadvisor logo in full color. The vinyl is only 0.002 inches thick and is self adhesive. They look great!http://www.rcadvisor.com/productsCarlos ReyesRCadvisor.com founder
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My Ardupilot Project's Status.

G'day all.I thought I'd start contributing more to the community and the best way I could think of was to start a post that shows my current progress and relay any lessons I learn along the way.Right now I'm still getting everything together however, In future, I will add a build log and the results of flight testing (among other things).Hopefully this information helps some of you out there.Cheers,NickHere is my planned UAV/FPV setup:Airframe•EasyStar | Ordered•Turnigy 40A Speed Controller | Ordered•HXT 2835 2200kv Brushless Inrunner | Ordered•Prop | Ordered•2S Lipo | Ready•3S Lipo | ReadyRadio system•Futaba 9C | Ready•9CH Reciever | ReadyArdupilot•168 Board | Ready•328 Board | Ready•Ardushield | Ready•XYZ Sensors | Ready•Pitot tube | Ready•Servo Leads | Ready [More info using these cables soon]•FTDI Cable | Ready•Locosys 5Hz GPS | ReadyFPV/Video downlink•2.4GHz 500mW Lawmate TX | Ordered•2.4GHZ I.F. RX | Ordered•Remzibi OSD | Received•Video Goggles | Ready•Camera | In process of selectingGround Station•MSI Wind | Ready•Xbee Modems | On Hold•Xbee Breakout boards | On Hold•Tracking Antenna | In Development.Additional Components•Foundation HAM radio licence | Passed :D•FMA Cellpro 4S Charger | Ready•Canon A590IS running CHDK | Ready [More info on interfacing this with Ardupilot soon]•Turnigy BESC Programming Card | Ordered•Watt Meter | Ordered
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Easy Cub; Where to get?

Is this plane:

103899d1240343472-esperienza-diretta-con-multiplex-easy-cub-img_0024_3.jpg

Link: http://diydrones.com/profiles/blog/show?id=705844:BlogPost:71763&page=1#comment-705844_Comment_72270[scroll down to Roberto's comment.]The same as this one?:

hbz7100.jpg

Link: http://www.hobby-lobby.com/beginners-super-cub-rtf_21697_prd1.htmOr this one with a different paint job?:

mpx4235.jpg

Link: http://www.hobby-lobby.com/multiplex-easy-cub_21721_prd1.htmI like the first one and think it would make a great airframe but I am confused as to where to find it; roberto calls it a "multiplex Easy Cub (1600mm wingspan)" but google turns up more than one different aircraft. Could someone please clarify for me?-thanks -rd .
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little help pls.!

hi guys me along with my team have built a uav capable of lifting 16 lbs and can take off within 100 feet. Now the team wants make it automated, may be semi auto or compelet auto .i have got one gps receiver unit , its Garmin 15l but i dont know how to start wit it.the design team wants these parameters to be calculated:1.velocity2.altitude3.location4.differential pressure on wings (top and bottom of wing)and i personally want to fit a cam on it.But i dont know where to find these modules , how much it cost, etcand can my gps unit give altitude??pls help, u can also mail me at shridhar.mb@ projectvyoma.com
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Odd roll behavior with MatrixNav?

Hi all, I'm new here. I'm trying to get an IMU based UAV up and running to do some research into higher level mission planning. I decided to go with William Premerlani's UAV DevBoard, but I'm having some problems with the MatrixNav firmware. I'm using a Parkzone Radian powered sailplane (3 ch, no ailerons).Right now I'm running without a GPS (it died in the last crash I think), but I mainly want to verify that pitch stabilization works with our airplane. So, the only modifications I've made were to turn on pitch stabilization in all modes (auto and RTL) and skip the GPS initialization.The problem I'm noticing has to do with pitch compensation during roll. My understanding is that a small amount of up elevator is required during turns in order to maintain altitude. When testing on the ground (just holding the airplane in my hand) I can pitch the plane up and down and the elevator moves correctly to compensate. When I roll the airplane to the left (to simulate a left turn) the elevator also compensates correctly by pitching up slightly to maintain altitude. However when I roll to the right, the elevator tries to pitch down, the exact opposite of what it should be doing. This actually caused two pretty bad crashes before I realized what the problem was, oh well.Has anyone else noticed or dealt with this behavior before? any ideas or suggestions would of course be very much appreciated. Thanks!
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One way to Restore a bricked xBee

I was able to restore my bricked xBee by following these instructions. Hope this helps!!Using the sparkfun USB explorer board.1. Take the module out of the interface board.2. Connect the interface board to the computer.3. Open X-CTU make sure Baud Rate is set to 96004. Go to "Modem Configuration"5. Put a check in the "Always update firmware" box6. Select proper modem from drop down menu,7. Select proper function set and firmware versionfrom drop down menus.8. Click on the "Write" button. After a few seconds oftrying to read the modem, you will get an Info boxthat says Action Needed. At this point, CAREFULLYinsert the module into the interface board.9. You may get the info box again a short while after,just use the reset button on the interface board.This should get you back up and running.It may take more than one try to get it to work, but mine worked the first time.The original problem was that some how a glitch corrupped the xBee so it wouldn't respond to the "AT" commands.Let me know if this works for anyone else.Doug
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Flight Tests With the EG 2.2

I’ve started flight tests with the latest Ardupilot code and hardware and will post my findings in this blog post. Info on my plane and set up can be found HERE. I’ve found the EG 2.2 has similar flight characteristics to the original EasyGlider including the same “reverse roll” and “reverse pitch” settings in the code so these results should help anyone flying the stock glider.A few notes on what I have discovered so far---The throttle immediately kicks in when you switch to WP or RTL mode. There is no “safety” coded into the throttle command such as, no throttle activation below a given altitude or a given speed, so be prepared if you switch from manual mode at the flying field. Also, in the .h file under Throttle gains the throttle_max variable is defined twice. I’m not sure which is used by the code. There are also some corrections to the manual that I posted HERE that may help others in their set ups. Good Luck!

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3D Robotics
From Slashdot: "Dan Edwards, a student at NC State University, is attempting to break two records by creating an autonomous glider. The project goal is a 142-mile cross country flight and a 25-mile flight (with return) without human intervention. The glider finds thermal updrafts and automatically circles them to gain altitude, much like birds and insects do. Recently, the glider flew in the desert for 4.5 hours, covering 70.5 miles by itself using only air currents to stay aloft. Since the NC State demonstration vehicle does not have a motor, this shows real promise for unmanned aerial vehicles (UAVs) that actually have a motor, with possibilities of extending flight duration considerably. Combine daytime soaring with a solar energy system to charge batteries for the night, such as the 84-hour flight by QinetiQ's Zephyr, and you might just get an answer to flying for months on end. With this kind of endurance, the eye in the sky that the city of Lancaster is considering might be even more practical."
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Developer

AttoPilot IR Sensors Now Available!

Attack! But please one unit per person! The demand is so high, be nice with others!To buy it click here please.[Copy/Paste Update]:Also note that FMA XY is $43, the Z sensor wasanother $25, and the cable wasn't included. So that was at least $75with cables. Also, we have to pay a royalty to FMA and don't buy partsat the same volume they do. Plus, of course, FMA doesn't make the Z atall anymore.You might also want to note that our sensors are less than thePaparazzi ones ($125:http://ppzuav.com/osc/catalog/product_info.php?cPath=13_5&products_id=66&osCsid=08841e8ba7cd41f6d279d30be5167e22)and the same price as AttoPilot. Or you can make your own, just buy the 6 thermophiles for about hundred dollars from Digikey (http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=MLX90247ESF-DSA-ND). So basically these are tied for thecheapest full XYZ sensor solution in the world.However, if people want to wait for FMA to bring the XYs back instock, people can always buy two of them and use one as a Z sensor andsave a few dollars. (just ignore one wire).
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Next attempt

Programing Ardu with original USB is easy - modyfications and compiling of sources in Ardu IDE is also easy .First how to connect GPS from OSD to Ardupilot .We must made a small hardware modyfication - add diode to suplly Vcc to GPS module and that all .[img]http://rc-cam.info/files/dioda_213.jpg[/img]dioda_213.jpgNext thing is modyfication in software - so in easystar.h file we must modyfiy line for GPS configuration like that:[code]#define GPS_PROTOCOL 0 [/code]Then in GPS_NMEA file like on picture :[img]http://rc-cam.info/files/symul_comment_740.jpg[/img]symul_comment_740.jpgOn bottom we see information send by Ardupilot - all is working in simulation mode with OSD GPS emulator software using two OTi cables - one is playning GPS with GPS emulator from remzibiOSD PC programand another port is monitoring TX line of Ardupilot .[img]http://rc-cam.info/files/s6301095s_117.jpg[/img]s6301095s_117.jpgAlso GPS is working as well with Ardupilot :[img]http://rc-cam.info/files/s6301098s_212.jpg[/img]s6301098s_212.jpgAs on simulation picture there are ATL problem - all time is 0 so I must to look closer why , maybe this is Ardupilot normal work .So in future - instead of monitoring cable will be pilot's TX to OSD's RX one connection to get Ardupilot data .Ok first practical try is done :) - all works fine , for next I will made some debug printing from Ardupilot and will start practical Ardupilot-OSD cooperation .Lastly - the main problem I have is a very short time I can spend for this nice playing with all this nice toys :) .
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New toy - Ardupilot

Thanks to Jordi (thank you for this possibility :) ) I started play with Ardupilot . The main goal is to connect it to remzibi OSD (poor man's OSD) -http://www.happykillmore.com/Software/faq.asp?LANG=Englishhttp://www.rcgroups.com/forums/showthread.php?t=921467in simplest way to Ardupilot , all advantages of both devices must be keeped autopiloting and custom layout config of OSD .s6301014.jpghttp://img14.imageshack.us/my.php?image=s6301014.jpgArdupilot is device designed for autopiloting and was not made for any FPV flight - so GPS originally is very close to autopilot board and VidTX probably also (VidTX is jaming GPS) , but using Video and GPS should be mounted at distance to each other .Ardu by his self are greate source of noise also - so any separation ( LC and RC lopass filter) must be considered for coupling RC RX signals .There is not possible (I do not know why probably IDE reads USB device VID or PID) to made and Ardupilot software update by USB OTi cable (belongs to OSD) - but original USB works OK (however can better) .I already concider to compile bootloader for mega328 as Megaload - will take from memory only 1k , as original ardu bootloader takes 2k now , also any USB-uart or rs232-uart cable will able to use for firmware update . In this case will be possible to use even mega168 Ardu with 2.2.3 software .OTi cable works great as serial monitor for Ardupilot or as debuging or whatever .Will test it more with PC GPS emulator .It is possible to connect remzibi GPS - but must be done some config in software like serial.begin(9600) for older GPS module or serial.begin(38400) for last relase , so in fact is very easy . Hardware change is a one diode on bottom of adru board . The config file changes are very simple .In total - Ardupilot is very nice and flexible device even using Adru IDE for programing - for beginers is even much more easier to use then raw GCC .Ardupilot team made really good job till now - in fact that sources are open - so this solution is real future having autopilot solution .For now ardu 2.2.3 firmaware takes only 14,4k (NMEA GPS) so not even 50% of total memory (32k at mega328) .Next soon .
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