RE: OS 120 FS Idle
Hi! The fuel nipple on the carb has nothing to do with tank rule! It's the fuel intake orifice , in the intake that counts, ! And...if the tank is to high ...why not move it down some!? Just take a Dremel with drum sander and remove some of the formers!! Simple task! Fuel length is very important! Always keep it as short as possible!
Posted on: 11/20/2009 5:22 PM by Author "jaka" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9268202

RE: OS 120 FS Idle
Hi! The tank rule goes like this! The center of the tank should be in line with the fuel inlet orifice of the carb when the airplane sits horizontal/flying position (tail high)! Tank size should be 300-400cc. No loop is necessary if you have a correct tank position!
Posted on: 11/20/2009 10:23 AM by Author "jaka" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9267391

RE: FUtaba skysport 6 question
GHi! Performance for what??? In most airplanes standard servos like Futaba 3003, 3001 and Hitec 422 will work just fine!
Posted on: 11/20/2009 9:43 AM by Author "jaka" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=9267296

RE: Specktrum Flight Log
Hi! It tells you if your radio installation (receiver/s) are installed correctly !! Good to have but not necessary!
Posted on: 11/20/2009 9:11 AM by Author "jaka" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=9267225

RE: Covering tips and advice
Hi! It's much easier to cover first!!! In fact it's the only way if you want a decent covering! And...Do not use Coverite!! It's a thing of the passed! Use Oratex or Solartex...much better!!!
Posted on: 11/19/2009 4:33 PM by Author "jaka" in the forum "Tips & Techniques"
http://www.rcuniverse.com/forum/fb.asp?m=9260306

RE: FUtaba skysport 6 question
Hi! Just connect the servos to the receiver and you will notice directly which servo goes where!
Posted on: 11/19/2009 4:30 PM by Author "jaka" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=9265659

RE: Prop Determination
Hi! The most suitable props for a .91 four stroke are 14x6 or 13x8! These props work best for 80% of all airplanes. For planes like You -Can-Do .60 , 3D models , a 15x4W or 15x6 or even 16x4 APC might work better.
Posted on: 11/19/2009 2:25 PM by Author "jaka" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9265439

RE: more right offset on eng?
Hi! Sorry! But there isn't such thing as noticeable torque in such a small engine /plane combination! The reason your model needs right rudder at take off is due to wrong setting of the wheels and perhaps landing gear location! -Or not using the rudder in the appropriate way. Second ! The reason the plane needs right aileron is due to warped wing! The reason I can say this is that I have flown, constructed ,competed for 35 years! Sorry for being so outspoken but I have seen so many R/C plane owners (novice fliers) that just blame torque in my days that I have to tell it the way it is! There even was an article in Model Aviation last month that wrongly blamed the torque factor! The first problem is fixed by having slight toe -in and slight camber built into the landing gear wheels! You must also check that the wheels are not placed too far forward! Too far forward and the plane hunts at take off!!! The second problem with the wing is easily fixed by twisting it with either a heating iron or a warm air gun, I presume the wing is covered with plastic film. You should always have slight wash-out in the wing tips! Check it with a Robart "Incident meter" or do it with watching (eyeballing) from wing tip to wing root and compare which part of the wing that is twisted. On small .40-.60 size models the 0,0,0 law usually applies
Posted on: 11/19/2009 2:02 PM by Author "jaka" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=9264973

RE: Engine ? re: World Models Nemesis 52
Hi! It's .40 size plane!!! Use a .52 four stroke or a .40-.46 two stroke! No more!!! I would use Hs 225 servos on aileron and elevator and Hs 80, 81, or 85 on throttle and side rudder. But standard servos like Futaba 3003, 3001 or Hs 300 or 425 will do too. But remember low weight is essential as usual if you want good performance!
Posted on: 11/18/2009 11:15 AM by Author "jaka" in the forum "ARF or RTF"
http://www.rcuniverse.com/forum/fb.asp?m=9262670

RE: 4 Blade Prop
Hi! A 3 or 4 blade prop will not perform the way a 2 blade will! But if it's for looks ..OK!
Posted on: 11/17/2009 1:08 PM by Author "jaka" in the forum "RC Scale Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=9260299

RE: O.S. 26 FS Surpass
Hi! The first thing to do is to check the ball bearings!!! If the engine has been sitting for as long as ten years , and previously been run on Castor oil , the bearings has to be replaced. Second. Use 5-15% nitro fuel and a 4 oz tank, preferable with Uni-flow set-up.. Third. Use a 9x5 prop! Fourth. Use adequate glow power ! A 12V, 10A motorcycle battery or a equal Lipo battery and an automatic glow driver! Those one cell 1,2V NiCad's have not voltage enough nor power enough for stubborn, hard to start engines!
Posted on: 11/16/2009 12:40 PM by Author "jaka" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=9257754

RE: U-Can-Do 3D, fuel foaming issue.
Hi! As Ed said ! The Tettra "Bubbleless" tank is the best there is. But...an ordinary tank works too, and you don't have to use any padding at all. I use a 12oz tank with Uni-flow set up in my "You -can-do .60". It's powered with a MVVS .91 two stroke and swings a 16x4 APC...runs for over 20 minutes on this tank. Fuel is 15% all synthetic oil and 5% nitro, the rest metanol. I
Posted on: 11/15/2009 1:18 PM by Author "jaka" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=9255334

RE: EPOXY, A STICKY QUESTION
Hi! Strange question when already 5min epoxy is so strong it can lift a car that weights more than a ton.
Posted on: 11/14/2009 12:23 PM by Author "jaka" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=9253179

RE: Building servo tray, Ultimate 40 Kit
Hi! Why use two aileron servos in your first kit! You will probably crash it or severely damage it anyway (I did 35 years ago) so why bother with two servos..?? It is much easier to just use one servo! In the picture I use the DuBro 1/8" aileron set-up.
Posted on: 11/13/2009 11:54 AM by Author "jaka" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=9250956

RE: Question - Hand launch Viper 500? Sport flyer
Hi! It's easy! All you have to do is hold it in your right hand (behind the wing) and toss it upwards at a 45 degree angle. It will climb straight up!
Posted on: 11/13/2009 10:35 AM by Author "jaka" in the forum "Q-500 Racing"
http://www.rcuniverse.com/forum/fb.asp?m=9248315

RE: Pull Pull servo placement
Hi! Front of the hinge line or right over the hinge line is Ok ...after is not!
Posted on: 11/4/2009 2:41 PM by Author "jaka" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=9227948

RE: ROSSI 45
Hi! The Nelson magic muffler that Rossi now uses is much better than the original flimsy black tuned pipe set-up that Rossi has used for years!
Posted on: 11/4/2009 11:20 AM by Author "jaka" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=9227565

RE: Pull Pull servo placement
Hi! Servo arm doesn't have to be same length as the rudder arm. But...it is vital that the rudder arm (wire attaching point) is not behind the pivoting point at the rudder. Otherwise the non pulling wire will tighten more than the pulling wire!
Posted on: 11/4/2009 11:11 AM by Author "jaka" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=9227552

RE: OS46ax
Hi! 9x7, 10x7, 11x6 11,5x6 ,12x4,12x5 or 12,25x3,73 , or 13x4 all APC works good but for different planes of course! Avoid the white tipped MA props. They are lousy performers and just put out a lot of noise compared to APC , RAM or Graupner Cam-prop which are the props of choice!!
Posted on: 11/4/2009 11:02 AM by Author "jaka" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=9227535

RE: safety: DX6i throttle lock
Hi! The DX6i is the only Spektrum transmitter that has a "Throttle cut" button!
Posted on: 11/3/2009 3:18 PM by Author "jaka" in the forum "RC Radios, Transmitters, Receivers, Servos, gyros"
http://www.rcuniverse.com/forum/fb.asp?m=9225496

RE: Range of Spektrum's AR6100 Receiver (don't make the mistake I made)
Hi! It would be interesting to see your set up's who have had failures with the Spektrum radio. I have used the Spektrum DX-7, DX-6i and Dx-7SE with full lenght receivers (AR 7000,9100 and 6200) for 3 years now without any problem and get a little curious of how your radio installations look like and what kind of batteries you use. It is my experience that 4,8V work just fine in the Spektrum radio as long as you use the right batteries that can put out enough amps and that you in every plane use a voltwatch meter...and most important mount the receiver and batteries in lots of soft foam. GP make as series of high performance NiMH cells (Red series) at 850mAh that I use in my Q-500 pylon racers and in my Marutaka DC-3 without any problems.
Posted on: 11/3/2009 1:13 PM by Author "jaka" in the forum "RC Radios, Transmitters, Receivers, Servos, gyros"
http://www.rcuniverse.com/forum/fb.asp?m=9225100

RE: engine mounting
Hi! Sheet metal screws work fine in plastic mounts(Craft-Hays). Have been using them on many Q-500 models (424). But another way of doing it is to drill and tap the mounts. Drilling and using nuts on the opposite side isn't suitable on many models...and those nuts are also hard to reach when you have to tighten the screws. Using Ca glue to secure the engine to the mounts when drilling is one way of doing it. But most of the time I just hold the engine firmly to the mount and drill just a shallow hole with my electric hand drill, then take the mount and using my bench drill, drill through the mount. Then I tap the hole (or screw in a metal screw if its a plastic mount)and use an Allen head screw to secure the mount to the engine. Then I take a long drill and using my electric hand drill I drill shallow holes having the engine lugs as a guide. I then remove the one bolt and put the mount in the bench drill, securing it in a wise, and drill the remaining 3 holes.
Posted on: 11/1/2009 12:47 PM by Author "jaka" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=9220138

RE: Second Plane
Hi! After having been in this hobby since 1975 I would not recommend a "You can do" for a second plane. A much better plane would be a more aerobatic plane in the . 40 size range , not a slow flying 3D plane like the "You can do" series (.40 and .60). Look for a sleek low winged plane made for a .40-.46 two stroke engine. There are several in ARF to choose from but a old favorite of mine, as being a pylon flier at heart, is the old, original "Q-500" made by Glenn Spickler in in 1972. This plane has just a simple box fuselage and straight constant cord wing and doesn't look that good...but it flies real good ,is tough and can do any maneuver you want. Top speed with a Webra .40 GT or ASP .40 using ordinary 80/20 fuel and 10x6 RAM prop is 180km/h.
Posted on: 11/1/2009 7:04 AM by Author "jaka" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=9219538

RE: What rpms on Sport Jett 0.50
Hi! What glow plug and fuel do you use?
Posted on: 10/31/2009 12:59 PM by Author "jaka" in the forum "Q-500 Racing"
http://www.rcuniverse.com/forum/fb.asp?m=9217679

RE: Problem problem problem
Hi! Problem with larger tanks is that the engine cannot cope with the changing pressure that occurs from full tank to nearly empty! Our engines go leaner as the tank empties. You probably know this already. This problem with the engine going leaner and leaner as the tank empties is worsened the larger the tank is. To remedy this lean out tendency it is vital not to use a too large tank and to use two clunks (Uni-flow system)in the tank for more even pressure distribution to the carb. But...a 300cc ( 10oz) will probably work okay too. But I would still recommend a 240cc (8oz) tank. On this tank you can fly for nearly 15minutes.
Posted on: 10/31/2009 12:55 PM by Author "jaka" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9217672

RE: Problem problem problem
Hi! I have been using many OS LA .40 engines through the years and I can assure you that your problems is not related to the 11x6 prop. In fact the OS LA .40 have no difficulties swinging big props like a 11x6 and 12x4 if you fly at sea level . 10x6 is a prop size that is not that good for the engine, at least not in a high winged trainer like the Kyosho "Calmato" and planes like that with a span of 160cm. For smaller planes like a Q-500 racer weighting around 1700-1800g the 10x6 could be used though. Best 11x6 prop is the RAM , Graupner Cam-prop or the APC. A 10x4 or 10x5 is way to small for most airplanes where the OS LA .40 could be considered For best performance use an OS 8 or Enya 3 glowplug. Other good glow plugs are Nova-Rossi 4, 4A or Rossi 3 or 4. It is also vital that the tank is not too big. A 240cc tank (8oz) works good for a 6,5cc engine (.40).Best tank set-up is to use two clunks,one for pressure from the silencer and the other to the carb , this is called " and gives a more even fuel flow to the engine. Even better is to use a Tettra "Bubbleless" tank..but this isn't necessary for your engine. Remember to place the tank according to the "Tank rule"! Fuel! The OS LA series of engines run fairly good on 0% nitro, but they will run even better on 5%nitro. 10-15% nitro is just a waste of money on these engines as they throttle and run just as good on 5% nitro. 20% Castor oil, 5% nitro and 75% Metanol is a good blend. Placing the high speed needle 10cm from the carb is no problem.
Posted on: 10/31/2009 10:41 AM by Author "jaka" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9217373

RE: painting over balsa surfaces
Hi! But to use car paint/filler/ products you have to first seal the balsa surface with either 25g glass fiber/24 hour epoxy or the old fashion "dope" paper or nylon/silk .
Posted on: 10/30/2009 4:51 PM by Author "jaka" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=9215720

RE: TWM Nemesis .52 as 2nd plane?
Hi! The Nemesis demands more experience than you probably have! Instead of getting an ARF plane like the Carusel above which isn't that got a flier...get a Q-500 racer, like the "Ryggskott" , "Dodger" or " Sonic 500" . ALL of them powered by a .40 two strokes will take you to speeds around 160-180km/h powered by an OS FX .40 , ASP .40 or Webra .40 and a 10x6 RAM prop using 80/20 fuel, weight is 1800g. These planes my look simple but I can assure you that they are very good fliers and you can do every maneuver in the book with them. The "Ryggskott" and "Dodger"is available in kit form a Swedish garage manufacturer and if you mail me I can send his telephone number. The Sonic 500 is available in a ARF kit in most hobby stores.
Posted on: 10/29/2009 5:17 PM by Author "jaka" in the forum "Beginners"
http://www.rcuniverse.com/forum/fb.asp?m=9212150

RE: Top Flite DC-3 Kit, What engines?
Hi! Covering is just ordinary Chrome Oracover (Ultracote), wet sanded with 1200 paper, on a sheet of glass to obtain that aluminum finish. Fuselage is covered by appr 100 small pieces of rectangular plastic film sheets to get that real alu look. Some complex areas are covered by using aluminum duct tape. Elevators are covered with Oratex (same as Solartrex ...but a little better). Side rudder is covered with silk and dope and spray painted with "Sikkens" 2-part Auto-cryl lacquer. Landing gear is just piano wire sweet soldered together, made to function like the original (not exactly scale though). Landing gear mecanics is 30 year old Giezendanner electric retracts. By the way...It takes off in just 20-30m and make large loops and rolls with ease.
Posted on: 10/28/2009 5:00 PM by Author "jaka" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=9209886

RE: Top Flite DC-3 Kit, What engines?
Hi! I use OS FS.26 four strokes in my Marutaka DC-3 (span 211cm) which is in the same size as the Top Flite DC-3. Plane weights 3,6kg ready to fly and flying speed is very scale like at 1/3 throttle. Any engine over .25 is way to big and will produce a plane that flies too fast . So go with either .30 four strokes or .20-25 two strokes. My DC-3 is very easy to handle and fly like a 2m span sailplane. It do this because it is built light and have 1-2degrees of Wash-out in the wing tips (just like the original). I use custom made 3-blade carbon props (10x4,5) which my OS FS .26 turn at around 9400-9900 rpm using 5% nitro and 15% all synthetic oil.
Posted on: 10/28/2009 4:30 PM by Author "jaka" in the forum "Kit Building"
http://www.rcuniverse.com/forum/fb.asp?m=9208650