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Model Forum / Radio Controlled / Water Models / September 2008predator outrigger ?
does anyone know about the plans on here for the predator outrigger. i downloaded them and the boat looks pretty small. are the plans full size or do they need to be scaled. thanks new to r/c boating  Signaturebrians306 the easy way to check how close they are is print out the part where the out rigger tubes go and check the hole size? Signaturenigec what if they are not the right size. what does one do then thanks.... Signaturebrians306 If you have the PDF version of these plans, take them to your local print shop, something like Kinko's I think for you guys in USA. They should be able to print them full size for you for minimal cost. I got some done in Australia for about $3.60 a sheet recently. Down on the bottom left of your PDF viewer, it tells you how big the sheet is, the one that I have tells me that it is 36 inches by 24 inches for the sheet which is about A2 or A1 size. It is a good idea to get a couple of copies, one as a reference and one to cut up, you can literally cut the shapes out and stick them onto the material that you are going to use. Signaturedeestingray thanks deestingray. now i see. how are things down under mate? Signaturebrians306 Excellent, you shouldn't go wrong at a print shop. :) Down under is all good, we are in winter at the moment, but it is still warm enough to run boats with nice days. Coming up to the best time of year in a month or so. Signaturedeestingray I've build this predator outrigger, with a strait shaft. I've got a speed 600 motor an a 40 mm graupner prop. It doesn't go very fast Am I doing something wrong GR Tobias (NL) Signaturetobias I am new to model boats and think you have made the same mistake I did on my first model - the wrong motor. I suspect you are using a brushed motor like this (http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXJ765&P=7). It operates at 11,000 RPM and puts out 145 watts of power. The power and RPM are not high enough to generate much speed. After a steep learning curve, I'm on my second boat. I'll share what I've learned about motors with the hope that others will correct me where I am wrong or add to the discussion so we can both learn something. There are two basic types of motors: Brushed and brushless. In general, brushed motors are rated by the number of turns (poles in the armature) - The fewer the turns, the higher ther RPM but the greater the current draw. From memory, the motor cited above has 22 turns. Typically, boaters will use a 7 to 12 turn brushed motor from a model car, such as (http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXRBE1&P=7), which operates at a much higher RPM. I have switched to using brushless motors. Brushless motors are given a Kv rating, the number of RPMs per volt, and a wattage rating, of power produced (745 watts equals 1 HP). Two types of brushless motors are available: outrunner and inrunner. Since outrunner type motors need air for cooling, they aren't usually used in boats. In-runner motors can be water cooled and are the type typically used. My latest model is a 24" rigger with a Feigao 540L motor (http://www.offshoreelectrics.com/products.php?cat=42). At 7.2 volts it turns over 19,000 RPM. Riding on the outriggers and the prop, I would estimate its speed in the 40 MPH range (double that of my first boat). I have found the folks at Offshore Electrics to be very helpful, answering several questions in the building of my second boat. Too, you may want to see what the manufacturers are offering - here's an example: http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXMDJ4**&P=ML. Here are a couple of interesting web sites I've found: http://www.fastelectrics.com/default.asp http://www.drcwebservices.com/ffe/Default.htm http://www.twistedliquidracing.com/Home_Page.html http://bbyracing.com/elecmonohulls.asp http://www.minicatracingusa.com/Samurai%20is%20here.html I hope all this helps and I'm looking forward to the responses from others. Randy > I've build this predator outrigger, with a strait shaft. > I've got a speed 600 motor an a 40 mm graupner prop. > It doesn't go very fast > Am I doing something wrong > > GR Tobias (NL) i have started my boat build things are going good. although i will need some assistance in the wiring of the motor speed control and servo. i dont know how if someone could. send a wiring diagram to email or something please Signaturebrians306 |
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