Bonzo Moon Posted September 8, 2023 Share Posted September 8, 2023 My Mini F22 , amazing the difference a motor change makes. Quote Link to comment Share on other sites More sharing options...
FlyinFlynn Posted September 9, 2023 Share Posted September 9, 2023 I had a couple of these these. Powered by CF2812 sized motors. They had a better than 1 to 1 thrust ratio so would happily take off vertically and are great fun. Yours has an extra deck and I wonder if there are any benefits to that as it will offer more wind resistance and weight. Quote Link to comment Share on other sites More sharing options...
Bonzo Moon Posted September 9, 2023 Author Share Posted September 9, 2023 They are great fun. Quote Link to comment Share on other sites More sharing options...
FlyinFlynn Posted September 10, 2023 Share Posted September 10, 2023 When you consider the cost of them they really must represent the best 'bang for your buck' , half a sheet of depron, a tube of glue, two 9 gram servos, a indoor rx and a 1300mAh 2 or 3 cell pack and a motor and you can do high alpha slow passes all day long! Quote Link to comment Share on other sites More sharing options...
Bonzo Moon Posted September 10, 2023 Author Share Posted September 10, 2023 1 hour ago, FlyinFlynn said: When you consider the cost of them they really must represent the best 'bang for your buck' , half a sheet of depron, a tube of glue, two 9 gram servos, a indoor rx and a 1300mAh 2 or 3 cell pack and a motor and you can do high alpha slow passes all day long! Dead cheap! This one here is my own Mini version of the bigger Flight Test F22 so it'll come out of an A2 foam board sheet. I scaled down their plans to 25% with Adobe Acrobat, PLUS I simplified the original nose to make a really simple and lighter build. Build blog is here Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted September 10, 2023 Share Posted September 10, 2023 (edited) May I ask please, are the wings completely flat or encouraged to form an aerofoil like shape by the fuzelage ? If not I assume the depron/foam board le and other edges rounded ? Thanks Edited September 10, 2023 by Rich Griff Quote Link to comment Share on other sites More sharing options...
FlyinFlynn Posted September 11, 2023 Share Posted September 11, 2023 Totally flat Rich, at least the one I listed is. You can leave the edges square if you wish, As per the plan there is a 2mm x 0.5mm carbon strip stuck to the leading edges and then you can round the foam down to those, the carbon does add some ding resistance and wing rigidity. I used 6mm depron sheet for mine, mounted the servos in slots cut in the skids, or just hotglued in a former under the wing operating the ele/flap/spoilerons by carbon pushrods. The battery and Rx fit in cutouts in the fuz under the wing plate, esc stuck to the body.. They would be great for combat. I have one well used (abused) and one unfinished one left.... + Quote Link to comment Share on other sites More sharing options...
Bonzo Moon Posted September 11, 2023 Author Share Posted September 11, 2023 19 hours ago, Rich Griff said: May I ask please, are the wings completely flat or encouraged to form an aerofoil like shape by the fuzelage ? If not I assume the depron/foam board le and other edges rounded ? Thanks Hi Rich, both my Mini F22 and full size version are also just flat 5 mm foam board. Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted September 11, 2023 Share Posted September 11, 2023 Thanks for the replies guys. Notes written about the motor/battery etc. for future reference. Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted September 11, 2023 Share Posted September 11, 2023 May I ask please, what prop are you using with the 2812 motor please ? Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted September 11, 2023 Share Posted September 11, 2023 22 hours ago, Rich Griff said: May I ask please, are the wings completely flat or encouraged to form an aerofoil like shape by the fuzelage ? If not I assume the depron/foam board le and other edges rounded ? Thanks At our scales and weight Rich, Flat Plate Wings are frequently used, easy to build etc etc, and even back in the 1940s aerodynamics writings, we're highly thought of for grabbing lift and air penetration particularly because of square straight leading and trailing edges. Just watch Shockies perform at indoor flying events. Quote Link to comment Share on other sites More sharing options...
FlyinFlynn Posted September 11, 2023 Share Posted September 11, 2023 (edited) 5 hours ago, Rich Griff said: May I ask please, what prop are you using with the 2812 motor please ? Mmmmm...not sure now, I think mine was cut down from I THINK a 7x4 to 6" diameter, that is a bit smaller than the recommended size on 2S so it might not be the most efficient but the model isn't exactly heavy. Don't forget, it is a pusher so the prop is fitted backwards, if you don't do that they don't fly so good! Item : EMAX CF2812 Outrunner Brushless Motor 1534KV for Rc Airplane (CF2812) Feature: The Emax CF2812 brushless out-runner motor is capable of producing up to 22oz of thrust and generate about 140W of power. It is suggested to use 3.5mm bullet connectors for ESC connection. Specifications: KV: 1600 Weight: 1.6oz (39g) Motor Diameter: Approx. 28mm Total Length: 47mm Shaft Length: 17mm Shaft diameter: 3mm Max efficiency: Approx. 15A Max Load: Approx. 18A Recommended Setup: 20A brushless motor ESC 2-3S LiPO and at least 1000-1300mAh. Prop Selection: Remember to always use props designed for electric motors, nitro props are heavier and might overload the motor. With 3S LiPO: 7x3, 6x4 With 2S LiPO: 9x5, 8x4 The above prop selections are recommended for sports flying at open throttle. You may use slightly larger props if you do not fly at constant open throttle. Remark: The pictures for reference only, Factory may be change the product design without further notification. Edited September 11, 2023 by FlyinFlynn Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted September 11, 2023 Share Posted September 11, 2023 Oh brilliant, thank you ff. I will enter all that info in my notes on this little model. Very much appreciated, thanks. Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted September 12, 2023 Share Posted September 12, 2023 Bump Quote Link to comment Share on other sites More sharing options...
Rich Griff Posted September 12, 2023 Share Posted September 12, 2023 Thanks again guys, plan now viewed and printed off in library. It's nice to have s scaler on the plan, A4 and a3, the largest size printable in town. 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.