- Parkjet Plans
- Polaris
Polaris
Polaris
Designed by Steve Shumate
If you download plans and build the Polaris, please consider sending the designer a donation for all of his hard work and inspiration!
PayPal | jetset44@gmail.com
Suggested Donation: $10.00
NOTE FROM THE DESIGNER
This model is a foam parkflyer adaptation of Laddie Mikulasko's beautiful Northstar seaplane. I named it Polaris to pay homage to the original (for those that don't know, Polaris is the astronomical name of the real North Star). This design is mostly faithful in outline to the original, but I did make a few modifications to adapt it to foam construction, electric propulsion, and to better suit the parkflyer role. This model handles beautifully in the air, and is smooth, stable and very aerobatic. It also has excellent water manners--tracks well, steers well, and lifts off effortlessly. It also flies well off of snow or grass, making it a very versatile model.
SPECIFICATIONS
Specs:Wing area: 343 sq in | Span: 29.0" | Length: 38.4" | Weight RTF: 20 oz | Wing loading: 8.4 oz/sq ft | Motor: Grayson 2212-06 | Battery: Thunder Power 2100 mAh 11.1V Prolite | Prop: APC 6x4 | Current: 22 amps | Watts: 240 watts | Power loading: 190 watts/lb | Flight controls: Elevator, ailerons, rudder
I used a Grayson 2212-06 motor, which is a perfect match for this airframe. It provides 1.3:1 thrust-to-weight ratio for unlimited vertical and roughly 70 mph top speed. Plus the small 6" diameter prop keeps the thrust line low to minimize the effects of the high thrust line. This model was designed to accommodate up to a 7" diameter prop—just mount the motor at the bottom of the firewall if using a 6" prop and at the top of the firewall if using a 7" prop.
When set up as recommended, this model has very little pitch trim change with throttle, even though it has a high thrust line. That's primarily because both the motor and horizontal stabilizer are installed with -2 degrees incidence. The low speed controllability of this model is especially good due to the location of the prop in front of the elevator and rudder, allowing it to turn easily on water, snow or grass—or fly at high alpha with excellent control.
BUILD THREAD
KIT AVAILABLE
Designed by Steve Shumate
If you download plans and build the Polaris, please consider sending the designer a donation for all of his hard work and inspiration!
PayPal | jetset44@gmail.com
Suggested Donation: $10.00
NOTE FROM THE DESIGNER
This model is a foam parkflyer adaptation of Laddie Mikulasko's beautiful Northstar seaplane. I named it Polaris to pay homage to the original (for those that don't know, Polaris is the astronomical name of the real North Star). This design is mostly faithful in outline to the original, but I did make a few modifications to adapt it to foam construction, electric propulsion, and to better suit the parkflyer role. This model handles beautifully in the air, and is smooth, stable and very aerobatic. It also has excellent water manners--tracks well, steers well, and lifts off effortlessly. It also flies well off of snow or grass, making it a very versatile model.
SPECIFICATIONS
Specs:Wing area: 343 sq in | Span: 29.0" | Length: 38.4" | Weight RTF: 20 oz | Wing loading: 8.4 oz/sq ft | Motor: Grayson 2212-06 | Battery: Thunder Power 2100 mAh 11.1V Prolite | Prop: APC 6x4 | Current: 22 amps | Watts: 240 watts | Power loading: 190 watts/lb | Flight controls: Elevator, ailerons, rudder
I used a Grayson 2212-06 motor, which is a perfect match for this airframe. It provides 1.3:1 thrust-to-weight ratio for unlimited vertical and roughly 70 mph top speed. Plus the small 6" diameter prop keeps the thrust line low to minimize the effects of the high thrust line. This model was designed to accommodate up to a 7" diameter prop—just mount the motor at the bottom of the firewall if using a 6" prop and at the top of the firewall if using a 7" prop.
When set up as recommended, this model has very little pitch trim change with throttle, even though it has a high thrust line. That's primarily because both the motor and horizontal stabilizer are installed with -2 degrees incidence. The low speed controllability of this model is especially good due to the location of the prop in front of the elevator and rudder, allowing it to turn easily on water, snow or grass—or fly at high alpha with excellent control.
BUILD THREAD
KIT AVAILABLE