Holdfast Model Aero Club Inc. Volume 2, Issue 8 August 2011 HOLDFAST BUZZ Editorial Steve Masters What to do when you can’t fly W ith cold, wet and windy days continuing I’m sure we have all been in the shed or spare room, working on that project you never surfaces connected, motor mounted etc. so I have started to think of the little extras to detail a semi-scale model. With Geoff Haynes Inside this issue: seem to have time for otherwise. Perhaps just excellent article on instrument panels last sitting in the lounge reading the latest model month I thought I would continue the theme magazine or watching the television. There has with a short presentation on creating stick-on Creating Decals 1 been some good aircraft shows lately, labels. 2 including The Worlds most Dangerous Airports President’s Note I have just received a disc full of photo’s of the and WWII lost Films: The Air War. 2 inaugural fun fly from Gregg Eustice so we Club Rules I have certainly been able to get a few hours should have a colourful Buzz next month, until on my current project, a CMPro Cessna 182 then happy modelling and flying. More on 2.4GHs 3 Skylane. The wing is completed, rear control Instructor Roster 4 T here’s a easy and cheap way of creating decals or transfers to decorate your model, whether it be those warning signs program such as CorelDraw is the way to go. I like to do a quick print on plain paper and size it against the model before finally printing to found on 1:1 scale planes or just a fancy logo the label. to make your ARF stand out from the crowd. Firstly you will need some inkjet printable adhesive labels. Office Works has a transparent label branded Ausinc and if you want a white label I suggest Avery J4776 which is a heavy duty label although you do HMAC pay a premium price. Lastly you will need to provide some sort of ANNUAL ACTION Next you need your text, logo or picture by protection to the printed label, I have used Friday October 14th either creating your own, scanning or of both Wattyl estapol and Brighton Secondary School course the internet. Plasti-kote clear acrylic successfully. Ensure you Doors open at 7:00pm spray a light dust coat and http://www.aerocockpit.com/decals/ let that dry then spray http://www.chiefaircraft.com/aircraft/ another light coat, you only decals-placards.html need to protect the finish. Scale your artwork to the plane based on your model’s scale, the logo and what looks right. You can get away with software like Publisher or Word but ideally a dedicated graphic JITTERBUG - a FREE PRO-PLAN from ACM&E Page 2 President’s Notes Y our Committee has decided to catch up on some housekeeping in the documents essential to the running of our Club. Of course careful consideration and try to come along to the October 7th meeting to register your vote. the Constitution is the most fundamental of all There is no need for me to tell you how bad Club documents and it has stood us in good the weather has been through June and July! stead for quite few years. No changes are At long last, as I write this, the forecast looks proposed to the Constitution at this point in good for the next week or so. The postponed time, but it is likely that we will have to make Fun Fly event was a great success and it was some changes in the not too distant future held in fine weather. Our thanks go to due to a dispute between MAAA and MASA organisers Ross Lloyd and Dave Whitten. regarding the 6 week grace period allowed Kathy Paterson was an excellent starter and Kingsley Neumann when paying affiliation fees at the end of the organiser, as usual. She really cracks the whip financial year. Obviously this has had an and gets everyone in line on time. This event immediate effect on Insurance cover. The promises to be lots of fun for everyone, even if HMAC Committee has decided to form a you can’t fly solo! It was very heartening to Constitutional Committee to review the see so many people having a go at Carrier Constitution and plan any changes when the Landings and Balloon Bursting. And time comes. everybody won a prize! The whole idea of a Club is to get together with like-minded people Meanwhile the most pressing issue as always and enjoy our common interests. If there is is that of safety. The Committee must always enough interest we will have a Fun Fly every be vigilant to ensure that all Club Members month in addition to the Point Ten Pylon and are flying safely and in accordance with the Combat events. Club Rules. A Safety Statement has been drawn up and the Committee is proposing that As the weather gradually warms up we will see it should be included with the Club Rules the grass start to grow again. Then we will be book. able to get out and mow it nice and short. All that winter rain must have done some good. If The Club Rules can be changed at an ordinary you can help with hand mowing or tractor General Meeting. Three areas have already mowing please approach the Committee. And been identified as requiring an update and while we are on the subject watch the notice that proposal is published elsewhere in this board for the Springtime Working Bee. issue of BUZZ. Please give the items your Kingsley Neumann Proposed Rule Changes. Para 2.2.1 Financial HMAC Members. Add new sentence: The Committee reserves the right to reject any proposal for new Membership or any renewal of existing Membership. The proposer shall be notified in writing of any such deci- sion. Paragraph 3. Delete existing paragraph 3.7 entirely and add new Paragraph: 3.7 Instructional flights must only be given to unqualified learners by MAAA Gold Wings Instructors. However, potential new Instruc- tors who are suitably qualified and approved by the Committee may give Instructional flights un- der the direct supervision of a Gold Wings Instructor. The potential new Instructor must attend the MAAA Instructors course as soon as practical. Insert New Paragraph as follows: 3.8 Due to the proximity of public roads and other obstacles, models requiring Heavy Model certificates must only be flown by persons holding MAAA Gold Wings. Recent Achievements Bronze: Leon Vincenzi (Inst. Ken Burdon, Graham Paterson) NOTE: Misspelling of names and omissions may occur from time to time. If you bring any issues to the editor’s attention I will rectify them in the next Holdfast buzz issue. Page 3 More on 2.4 GHz – the importance of a good power supply. While 2.4 GHz technology has significantly load imposed by the servos when using 2.4 GHz improved the reliability and features of R/C radio radio equipment. equipment, an often overlooked requirement for One approach is to use a LiPo battery and ensuring this reliability is the quality of the separate regulator which will comfortably handle receiver’s power source. Failure to provide a high instantaneous current draw. Typically a 2S ‘clean’ source of power to a 2.4 GHz receiver can (7.4V) 1000-1500 maH 15C battery coupled with render it even less reliable than older technology. an 8-10A regulator will handle all but the most In the 2.4 GHz world, the transmitter and receiver demanding servo setups. It is now possible to buy connect using a “binding” sequence during which high voltage (HV) servos designed to operate a free channel in the radio spectrum is chosen directly from a 2S LiPo battery, removing the and the receiver detects its mating transmitter via requirement for a voltage regulator. Most servos a bind code that is unique to that rated at 6V can be used with a 2S (6.6V) LiFe transmitter/receiver combination. This process battery which again eliminates the need for a can take a few seconds and occurs each time the regulator. The good thing about LiFe is that it is receiver and transmitter are powered up. It also much safer than LiPo, so charging in situ is not a occurs after signal loss occurs and is then fire risk. restored, or the supply voltage to the receiver For seriously larger models with very high torque drops momentarily below the minimum operating servos, the best power solution is to use a power value. distribution module such as the Smart-Fly or A typical 2.4 GHz receiver has a much wider Emcotec brands, which isolate the receiver tolerance to its supply voltage (typically 3.5V – One approach is to 9.6V) than older generation equipment. However, use a LiPo battery should the input voltage fall below the minimum and separate value, even for a fraction of a second, on power regulator which will restoration a bind sequence is initiated which comfortably handle means that control of the aircraft is lost for a high instantaneous couple of seconds until binding is restored. This current draw. could result in a crash which may not have occurred with a 36 MHz radio, because in the latter case the loss of control would have been measured in milliseconds rather than seconds. One major cause of power supply “glitches” is the instantaneous current draw by changes in servo position, particularly when multiple servos Smart-Fly Power Expander Pro are simultaneously commanded to move. The demand placed on servos to maintain control surface voltage from the servo voltage. This provides a position under heavy load constant voltage to the receiver regardless of any can also result in high battery voltage variation due to servo load. current drain which will In summary, by taking care when selecting your lower the instantaneous power source for the flight pack, you can be battery voltage. It is confident that this aspect of your setup will not therefore imperative that compromise the inherent reliability of 2.4 GHz battery capacity and technology. BEC/regulator specs be Hitec 5665MH 7.4v servo properly matched to the Geoff Haynes maximum possible power Ross Lloyd's electric ducted fan model streaking past at the HMAC Field. Scratch built from plans by Ross. PHOTO: Dave Whitten HOLDFAST MODEL AERO CLUB Newcomers to R/C modelling are catered for by setting aside every Sunday morning from 10 am when qualified instructors will teach all aspects required for the safe P.O. Box 94 O'Halloran Hill operation of the model. During the training period no S.A. 5158 other models are allowed to fly, ensuring the least possible distractions to the student. Club Phone: 08 83772708 Newsletter Editor email@example.com Other than Sunday morning the field is available for general flying from 10 am till 7 pm every day of the week. Due to the reasonably close proximity of the suburbs the club imposes a 96 db. noise limit. However, gliders and We’re on the web! electric aircraft may be flown at any time. www.holdfastmac.com.au August 2011 Events Day Pylon Racing Scores WWI Combat SCHEDULE OF EVENTS Open Class Pylon Merv Harris (HMAC) 1 Peter Smyth (HMAC) 98 Graham Paterson (HMAC) 1 Friday 2nd September - Club Tom Jacobsen (Noarlunga) 95 Max Thomas (HMAC) 1 meeting night Greg Leigh (Noarlunga) 90 Sunday 4th September - Events Vin Pike (HMAC) 88 WWII Combat day, training till 11:30 Mike Savill (Connie) 59 Ross Lloyd (HMAC) 6 Finn Kank (Noarlunga) 48 Kingsley Everett (HMAC) 1 Sunday 18th September - Fun John Jefferson (HMAC) 1 Fly Standard Class Pylon Ian Pearce (HMAC) 1 Flight training all other Sunday Ken Burdon (HMAC) 78 Graham Paterson (HMAC) 68 mornings till 12:00 Bob McEwin (HMAC) 62 John Yianni (HMAC) 62 Ian Cole (HMAC) 60 Peter Robertson (HMAC) 60 John Jefferson (HMAC) 53 James York (Noarlunga) 50 Instructor Roster (SEPTEMBER - OCTOBER 2011) Date Instructor Instructor Assistant st AUG 21 Graham Paterson Ross Lloyd Max Thomas th AUG 28 Matt Jamieson John Jefferson Trevor Baudinette th SEP 04 Peter Robertson Allan Scroop Kingsley Everett SEP 11th Kingsley Neumann Graham Paterson Max Thomas th SEP 18 Ken Burdon Matt Jamieson Trevor Baudinette th SEP 25 Ross Lloyd Peter Robertson Kingsley Everett OCT 02nd Allan Scroop Kingsley Neumann Max Thomas OCT 09th Graham Paterson Ken Burdon Trevor Baudinette We are fortunate in having so many rated instructors and our thanks go to those keen instructors who turn up even when they are not rostered on. We expect to see more learners now that the warm weather is here. Advanced Flying Training is available on request, so if you want to brush up your flying for a Wings test, please arrange a session with one of the Instructors. There are still a number of “Solo Only” flyers out there who could easily qualify for the Bronze Wings.