You are invited to the next AeroNutz Fun Fly which is on Sat 29th November 2003 5pm until 11pm. Parklands Centre, Wigston Rd. Oadby. £8 per flier, Bring a warm jumper as the heating will be off, tables and chairs are provided. All fliers with models over 10g must be insured. Remote control machines must have semi scale appearance - on sticky looking things please! If your are unsure please check before travelling. Max. Weight for any model will be 80g. This would have been lower but we are pleased to see the super scale Falcon kit's balsa machines from Chris at Falcon Models.
5.14g , 7" span, three channels, R/C
Joe writes "First I tryied the Didel 4.5 motor geared 4 -1, and the 90 cell. I used a 3 blade prop and quickly burnt the motor up. I then went to the 6mm 8.5 ohm motor gear 4-1,and this gave me good power. Henry Pasque is using the 4.5 ohm motor with a 4-1,and the small .7 Co2 wood prop with good results. I will try this next. I rolled up the 40ma r cell and it fits in the fuse. The model now weights only 5.14 grams with the 40mA cell. I purchased the Testors 1/72 scale plastic kit for $7.00 (£5). It comes with two versions of Corsair decals, and you can copy them on paper and apply them with a glue stick if you like. The actuators work great though. Thanks Joe."
| Joe Malinchak's NEW 7" Corsair. Shown here with 90mA E Tech lithium polymer cell, 6mm diamter geared pagerweighs 6.5g. The 27 Mhz super light three channles control system is by Nick Leitchty. |  |
Model uses Fritz Muller's coil actuators and is very nicely made from 2mm wall. Joe says he is going to make it even lighter! |
"I finally finished the 7 inch span 1/72 scale 3ch R/C Corsair. I painted the model with model master paints applied with an airbrush. I used the decals and canopy from a plastic model kit. Pappy Boyington's F4-U is one of my favorite aircraft. I used a 6mm motor, and the 90 Li-poly cell for maximum performance. I painted over Fritz's actuators with no harmfull effects. I may also build a C02 version that would weight only 3.5 grams with the G2.6 motor."
New actuator design from Bob Bailey in Florida.
He has designed as MW actuator that has very good centring. Matt has testeded it and has given it the thumbs up. Brass wire springs are used to centralise the rudder. The actuator is mounted in the fuselage. Two actuators can be combined which saves weight. Each actuator uses a maximum of 50mA at 3.5v supply and weighs just 0.1g. Not bad for a bit of bent brass and carbon fibre rod!
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Matt sends these two video clips of his tests on Bob's actuator
Vid clip of Bob's actuator to show it's accurate centering capability.
Vid clip of Bob Bailey's super centering Flexinol actuator in Matt's new test plane. Testing showed the actuator to be good
Matt reports live from California ....
" Good stuff: Fairley easy to install the BBA inside the fuselage using little mounting tabs. Drilled out the BBA horn to accept the .009in. music wire pushrod ends, and glued wire insulation collars as keepers. Used music wire and aluminum plate with holes for hinges. Was very careful to make sure pushrods did not touch anything throughout entire travel. Bottom of fuse was covered for flight.
Itook a couple flights to get the CG right, both fore/aft and left/right. Then did careful flight tests where I flew a straight line and gave a little right stick and noted the movement, and same to the left. The plane performed perfectly allowing very slight and subtle control around neutral, felt perfectly normal like a servo or coil controlled plane. This is completely new to me for a muscle wire controlled airplane, normally you are constantly on the rudder stick to make it fly simply straight, and elevator control is usually horrible. I was able to do loops, steep dives, 10 foot diameter circles both ways, and have enough subtle control to fly at myself and catch it.
Overall excellent flying performance, really nothing at all to complain about.
Two times I dropped the model while catching it, and it landed on it's tail both times on gravel ground, and did not damage the actuators.
When installed in the model, the BBA does 'buzz' a bit, same sound as the mag-coils, but way, way, quieter. Actually nice because just loud enogh to hear what's going on. Amazing that it's heating and cooling a thousand times per second to generate that buzz.
Not so Good stuff:
I broke the rudder muscle wire at the field when I accidentally pushed super hard on the pushrod while trying to adjust it's length. That was about an hour of repair.
Another time the rudder MW slipped as a result of landing on it's tail, and I had to fiddle the get the horn re-centered. Note that the point where the MW attaches to the horn it can slip. This is good actually, better to slip than break, but again, took a long time to fix.
In general, it's a bit of a hassle to deal with the delicate parts, and being careful not to over-stress the MW and break it.
My Conclusions
Based on my short experience with the BBA, I like it, it's not perfect, but I like the super low weight (1/16th of similar power mag-coil) the small size, and the quiet operation. The downsides are the delicate nature of it, difficulty in servicing, and right now it requires somewhat special software to achieve optimal performance (linearity,smoothness). Would not recommend a beginner to build and use a BBA, but definately would to an experience micro flier, especially if you are at the limit of what you can do with the lightest mag-coils.
Matt has some pre cut lengths of 025LT Flexinol actuator wire with brass tube terminals on direct from Dynalloy. These will be reviewed and may become commercially available in the future.
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Andrew's action shot shows Wigston John's new F/F electric Depron flying straight off the building board. Direct drive means silent flight, looked nice in Orange and brown too. It flew very well all night. Bernard says it is a scaled down vintage design. I think you have to be over 80 years old to differentiate one vintage design from another ? Flew very well though and it seems this model came as a bit of a surprise .... Maybe John is creeping towards micro Reno stardom? He is certainly and excellent modeller |
R/C Model Flier will publish Mark's Aeronutz article on the 10" Jigglet / Flexinol actuator on 8th Jan 04. Form a que outside Smith to beat the rush me thinks. It has some really nice close up picies. Bernard said he cant sleep "Its just like Christmas moring when I was a kid, except in January anyway" Lets hope its not raining, maybe get one delivered? I think I might take a day off work ........
Flitehook are coming to our Fun Fly on the 29th Nov, they have a big supply of U80 props now and a new version of Bison quick drying glue. They also have the grey Potensky plastic props that Mark and Peter Frostick are experimenting with and a transit full of other goodies of course.
Weights and measures. Now we have the new JMP 2g, radio control Rx and 90mA cells it is easy to make a R/C roof cruiser weighing from 10 to 15g. This should be considered a standard size model at about 10 to 13 inches span. Lighter models will use proportional Infra red or 27 Mhz radio control. These will weight between 6 and 10 grams. Nutters will be playing with sub 6g remote control planes.
| Ugly? Most of us think so Not sure why Bernard made it, as he thinks so too? |
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Several of the Aeronutz went to the model boat show so we thought the Aeronutz could organise a bus for future outings. Our first Aeronutz trip is at the beginning of December and set up by Mark. Send a deposit of £80 for the Clothes Show Live at the NEC. Melton John is the only one who dresses well-out of a gang of 32 - some room for improvement there then?
The Midland's nomadic insect trainer , Big John Mack flew his super rubber powered twin motor aeroplane along with a range of little and large ornithopters. John says you can't steer an ornithoper much with the tail surfaces because there is very little breeze moving over them. Steering is best done by adjusting the wing tips although sometimes even the bigger flappers just don' t wanna fly!
Bernard's new smaller 13" span Tom boy, Depron design and rubber power Demosiellelle
Very orangie table cloth
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Bernard used Andrew's electric timer in one of his F/F cabin models. All went well but Bernard says the complexity is not justified when he can use a super capacitor instead of a lithium cell and timer. However, the timer means you could be using a much smaller lithium cell and motor and fly the plane all night without charging it up. Mark has 7g remote control planes flying so it should be easy to make a 7g F/F plane?
Another John electric had some nice flights with his Depron Tomboy using direct drive electric power. There is quiet a gang of Bernard's disciples over in that corner. Might have to keep an eye on 'em in case they are planning a coupe?
| Jag. Graham's DC3 Flew very well in big smooth circles. R/C with servos |
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Mrs Bernard only allows a little bit of wall (in the bathroom Ed) so Bernard has to keep obphiscating his planes to make way for new ones. Current fleet seen here ........ didn't spend much money on the wall paper then?
Bernard himself had plenty of planes flying, mainly using Mark's lithium super capacitors and high resistance direct drive motors. The blue and white shoulder wing has two caps and easily gets up onto the roof from a rises off ground take off.
Andrew's picture shows Bernard's new smaller version of his flying boat design. If he made it about half size it would be about right for the Aeronutz Scheieder Challenge for R/C planes
Bernard didn't fly this nice little vintage rubber Depron/stick design as he did not have enough time, 6 hours and not enough time?! Note modified Ikara prop. Cheap, plentiful and bendy - what more do you want for a Quid?
Geoff flew this nice little sports R/C sitck and tissue model and several others like it too. Most use the 27MHz toy car control system but one had a JMP 35MHz receiver. It was not particulary obviuos which one .... take that as a success then Mr JMP
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Nick Leichty is kindly sending Mark one of his new super micro 27Mhz receivers with a timer function to switch off the flight motor. Nick knows it works as he has flow it over 30 times in his NASA (Nice And safe Aeroplane) demonstrator. Does this mean the Rx is pre owned? Nick's finger prints could add as much as 32 percent to the weight of the Rx!
| Picture shows, eh? two small round things and some wires?! |
 Whatever it is, it's real small ...... |
Geared 6mm pager and wooden Gasparin prop powers the test bed development plane.
Aeronutz clarification. "Young person" someone under the age of 58.
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Jag. Graham's wall foam Gemini |
Graham made as a quick proto type to see if the direct drive, pager motors are powerfull enough. Just about if you use rudder control instead of twin motor steering. Looks super, weighed 15g, flew slowly in silence. Certainly set the standards for multi engine models to come. Flew with the new 90mA cell and 140mA cell. With and without voltage booster. He has since flown it at Coventry and said it flew much better there, propbaly less gravity over there.Nice scale lettering is based on the full size machine at Old Warden.
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Grey props seemed a little better than these orange ones |
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Andrew flew his Avro York (Lanc) . The first flight was a terrific duration flight cruising just under the steels. The electronic timer finally cut in and it gradually descended for a nice touch down. Shock! Andrew announced the timer had not worked and the York had run a muck! Well a super flight either way, followed by several more |
Park Flier! Bat out of hell
Matt has updated his P47 park flier. The 9" balsa fighter is designed to fly really fast. Matt has swapped four 145mA Hr lithium polymer for the original five 110 mA Hr NiMH cells. The polymer cells are wired two in series and two in parallel to give 290mA hr and 8 to 6 volts. Matt writes "I re-fitted my 9", P-47 with 4 Kokam 145's 2S2P. Weight is down to 40g from 44g with the 5 cell nimhr pack. This guy really hauls ass now, crazy fast, clocked it at a max speed of 56mph (2,800 mph scale speed) leveling off from a shallow dive. My hands still shake after every flight! "
A victim of his own success?
Ray's mini Tiger Moth was very smooth and stable. It flew great all night. It cruised effortlessly about the hall. It's small size (10" span) and weight (13g) means it has a small turning circle. Ray just flies in the bit of hall in fornt of him. He has also taken to sitting down when flying so it's not all that obvious that the plane is remote controlled! The little TM started out life as a rubber power F/F model - proof that our efforts to minaturise the control systems are paying dividends after many years of work. It uses Z Tron infrared control with coil/magnet actuator. Silent due to it's direct drive motor. Uses aN E Tech 90mA polymer cell and small plastic prop. used on the "B2"park flier. The motor is a short version of the Kp00 normally used in servos, about 4.5 Ohms, from WES Technik.
Duration was good as it silently cruised around the hall, very nice, very TM, very Aeronutz.
| Smaller of John's F/F Depron space age canards, electric powered |
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Here is the bigger one, rubber powered? Both seemed stable but did not climb, probably not enough power? Mark's taught his own version, a simple profile test glider to fly. The elevator as at the front and goes the other way .... Up for down. It would be nice to see these up there circling in the steels. Maybe they need to fly faster ....... several thousand miles an hour faster
Ted came back - this time with a super F/F Mossie. Twin direct drive KP00's and three 50mA NiCD's. Based on the plan in Aeromodeller a couple of years ago. Ted went away with one 90mA E Tech polymer cell .... huge weight saving is imminent, of course crashing is then less violent.
Ted, also flew a F/F, rubber powered Yak - I think it was a Yak anyway? His super bright pink Penny helicopter flew but not as well as they can fly because he did not have the correct rubber motor for it.
Melton John flew a very nice French/German outdoor duration design used in competitions during the 1930's. Flies very well and looks nice with a Turtle deck stylie fuselage. This would make a very nice sports r/c plane. Very slow and smooth, Ikara prop and a bit of knicker elastic (Rohan Knickers? Ed)
| Geoff's Christmas Special Uses Falcon servos, Depron Lithum cells. |
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Geoff had a new R/C Pitts Special with the new Falcon 1.7g servos. They look very good and produce a smooth action. The Pitts was underpowered but that can quickly be sorted out.
| Falcon servo on ailerons Seemed to work very well
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More New technology. Ray used his R/C micro Swordfish to launch a superbe torpedo attach HMS Bernard. The attack faultered and the torpedo just missed Mark's table hitting the netting by the door. I wonder the BMFA / AMA regulations are regarding indoor Torpedo attacks? Picure below shows said torpedo and Mark's Albatross which is the same size as Ray's Swordfish. The Swordfish is looking rather battered which is Ok as it is very old now and can been seen with NIMH cells just about flying on Andy's video page.
A series of events to encourage and develope new indoor model flying technology Rules. 1) Have fun, the events is yours so don't break it 2) Plane must be 7g or less and 7" span or less. Plane must have flown at one of the full size races ..... so no P51d's with floats please. Planes must have three dimensional fuselarges. Judging. Well, we all know what a super plane looks and sounds like ......... In the Aeronutz spirit of things we would luv to see a super scale plane with many features such as flaps, sliding cockpits, lights and retracting wheels. This might not be possible now but our history suggests it will be at some time in the future. Flights that are scale like would be good too The inorgrial meet and show is at Parklands Leisure Ctr Oadby Leicester England on Sat. 29th Nov. at 8pm. Mark is the only person in Europe with a plane that qualifies and that might not fly! But the learning curve will be steep and greatness will be achieved. We are keen to see nice artwork, silent flight, scale proportions, slow / fast flight |
Park Fly Rambler . During the summer we saw a very nice Rambler flying F/F electric at Olde Warden. Pictured above is John Stennard's KP00 powered R/C version using coil actuators and lithium cells. Should look very nice on a summers day, blue sky, fluffy white clouds ........... Flitehook have the kits? Maybe use direct drive for silent flight?
Melton John's super looking American Canard, its green (no I dont know what itss called) Does it fly? Do you think this would fly ?!
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Mark's infra red controlled 7.5g, 10" Jigglet flew much better after he bent some more airfoil into the wings - there must be something to this aerodynamics after all!. It had a big spiral dive crash when Mark turned the transmitter stick the wrong way. No damage was done due to the lack of momentum.
The massive Rumpler 6B flew ok in straight lines but would not turn. Probably due to a small fin / rudder
| Small rudder? Yeah, looks small glad I mentioned it So am I |
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An English 2p coin weighs 7.1g,
At the end of the evening Mark tried his flying test bed plane, a 6.5" span Power Hi Fi . The idea was to see if the 4mm pager motor would be ok with a wooden coarse pitch prop from Potensky using 3:1 gearing. The plane uses one of the new 90mA polymer cells so Mark fitted Z Tron IR control system for the throttle so protect the battery. The total weight of the plane is just 5.5g. The model flew really well, climbs out nice and could be flown throttled back - a super benchmark for future micro R/C planes. As luck would have it the plane's trim made it glide right so by adjusting the throttle it could be directed into the centre of the hall and set to fly in smooth slow circles just under the roof! The motor would have been using very little power - about 200mA so the flight time would be half and hour! The entire plane is 2mm wall foam so it is quick and easy to make too. We often thought we could steer the plane by just using the motor torque, how true
Following the successful test bed Power HiFi plane Mark has made a 7" Corsair which will have the same motor and battery. Should weigh 6 grams with APPA rudder.The New Corsair will be powered by a modified Grey Potensky plastic prop instead of the more expensive wooden Gasparin. Peter Frostick suggested increasing the grey prop's pitch by warming the hub and carefully twisting the blade with long nose pliers. Mark has done this and it was not too difficult, make a simple cardboard jig to set each blade and then re balance the prop. Grey props are 50p each from FliteHook.
Hands Free - Mark tries to shoe horn the actuator into the back of the new 7" Corsair test bed
New flier's guide.
For several months we have been at the cross roads waiting to see which way to go, reluctant to suggest a design suitable for new fliers. Now we have the JPM 35Mhz R/C Rx and 90mA cells we can recommend a small light model that could be flown outdoors in still air and can be flown with other models without having interference problems. Ray's super little foam Tiger Moth weighs 13g and is just 10" span and is not too difficult to make or fly but looks great. Interestingly Ray TM started life as a rubber power F/F plane. So if you are interested in a nice little R/C indoor ship We would make it out of foam but these days you should be able to make a plane from traditional stick and tissue if you keep it all lightweights.
Total weight should be about 13g.
90mA cell @ 2.4g, WES Tech iron core motor type 3 .015 @ 2.5g, 65mm dia plastic, two blade prop @ 0.5g, JMP 35 Mhz narrow band Rx with crystal and wires2.2g, Coil actuator 0.5g, Plane 5g Total flying weight = 13g
You don't have to worry about the cell being damaged by going below 3v because the JPM Rx switches off at 3v. Direct drive for silent flight, which is much nicer
Power to weight ratio.
We usually recon on 50 per cent being about right for a roof cruiser. So at 13g we would need 6.5g at take off. Mark's tests show that we get 8g of thrust at 4 v using 350mA and 5g of thrust at 3v using 200mA
Once again we have hit 'em for six
with a cover drive through silly mid off.
This autumn we have made some fine progress. Reduced the weight of our R/C planes and improved their quality and diversity. We now have new motors and prop and a timer so we can use lithium cells for F/F. Our R/C planes are now so small we can make then from 2mm wall foam. Bob's new 0.1g MW actuator sets new standards for the spring.
Merry Christams!
Yourunclemark