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Posted by Aeroplayin | May 05, 2017 @ 03:12 PM | 2,968 Views
102" Purpose-Built-Electric SU-26 with sheeted foam wings, stabs, and turtledeck, with high density foam and 1/16th inch balsa. It's covered in genuine Oracover and the ailerons can be cut to custom sizes for IMAC, 3D, or XA. 6800W of power and enough capacity for 5.5 to 6 minutes bring the plane to an AUW of 24.34 lbs RTF.

Covered weights:

Fuse + Rudder = 2165g
Battery Tray = 83g
Firewall = 101g
Motor Beam Top & Bottom = 103g
Wing 1 = 941g
Wing 2 = 944g
Wing Decals = 99g
Stab 1 = 236g
Stab 2 = 236g
Cowl = 528g
Canopy = 267g
Wing Tube = 169g
Stab Tube = 66g
CF Landing Gear = 197g
CF Tailwheel Assembly = 57g
KavanLite 5" Wheels = 147g
Steel 6mm Axles & Hardware = 32g
Hardware = 39g
Triangle Stock and Doublers = 28g

Total Empty Weight = 6438g or 14.19 lbs
Power & Control Components for 6800W and 14S 5300mAh = 10.15 lbs
AUW = 24.34 lbs

This plane would be about the same weight with a DA-100L on ES pipes and about 500cc of fuel.

MAC * Wingspan = 1928 sq in wing area
Wing Loading using MAC * WS= 29.1 oz/sq ft
Wing Cube Loading using MAC * WS = 8.11 oz/cu ft
CG at 12% Static Margin = 8.0 inches at the wing...Continue Reading
Posted by Aeroplayin | Jan 06, 2015 @ 12:18 PM | 10,003 Views
Here are some quick instructions for the PAR Calculator, which is still in beta. Some formatting changes and text corrections still need to be made, but I want to complete the beta testing so I can make all the semi-final changes at the same time.

I've also included an image illustrating the measurements that are required in order to calculate PAR values. These measurements should calculate to the exact same value as if we calculated the MAC (mean aerodynamic cord) and multiplied it by the wingspan. Anything close to a 100 PAR is very good, and you should find some that will be as high as 115.

Please remember that PAR is a highly subjective ranking, and you should instead focus more on the actual values associated with them, such as wing loading, wing cube loading, power loading (Watts per pound), pitch speed, stall speed, etc.

My suggestion is to add data for your favorite planes, and perhaps establish your own PAR. Then use the PAR Calculator to identify planes and power systems that share similar values with your personal PAR.

For more information about the PAR Calculator, PAR values, or to ask about a specific motor, prop, and cell count, configuration that you may be considering, feel free to ask.