A one year subscription to the calculator is just $19.95!

Subscribe to the calculator to unlock advanced features such as the EZ Optimizer, component filters, advanced charts, and the airfoil database.

The subscription starts on the date of purchase. They do not auto-renew - expect a reminder email about a week before it expires.

If you already own a copy of RCadvisor’s Model Airplane Design Made Easy, enter the first word on page 180 as a Coupon Code on the Checkout page to get a $10 discount on this product. That brings the price of a one year calculator subscription down to just $9.95!