# Search results

1. ### Rolls Royce Gem engine information required

Hello all, I have some Post Graduate students I am currently working with that are involved in a project involving the use of a GEM engine, I was wondering if any of you have any experience of these engines, they are struggling to get any information/data on them, the engine in question has...
2. ### Bell Shaped Lift Distribution - best compromise to achive it.

A question for the group, I have been looking into how best to achieve a bell shaped lift distribution for my latest R/C model. As I understand it the Horten borthers achieved a BSLD by a combination of Geometric twist (washout), Aerodynamic twist (Reflexed airfoil at the the wing root...
3. ### Prevention of tip stall on a swept flying wing using partial drooped leading edge

Hi all, I have recently been looking into the design of swept flying wings and have built an R/C testbed model to test out my ideas. It flies well enough but is prone to tip stalling. I am retrofitting it with a NASA style drooped leading edge over the outer 1/3rd of the semispan in a bid to...
4. ### The effect of sweepback on adverse yaw on flying wings

I have been thinking about adverse yaw as this seems to be the number one problem in the adequate control of swept flying wings. The key to a successful flying wing design (without fins) seems to me to design a simple means of negating the adverse yaw for all normal flight regimes. Does anyone...
5. ### Approximate Neutral Point location based upon C-Point

I have been toying with the idea of trying to create a formula that will give a good approximation for the neutral point of a linearly tapered and swept wing allowing for sweep effects. I have based it on the C-point calculation used by Dr. Panknin, the Hortens, K. Nickel etc. (this assumes...
6. ### Dynamic and Static Yaw stability of a swept flying wing with winglets

All, I have just read through John Roncz's excellent article on designing homebuilt aircraft featured in the February/March 1990 edition of Sport Aviation. He mentions tail volume as being important to static stability and damping power as being important to yaw damping and therefore dynamic...
7. ### flying wing (tailess) aircraft model neutral point and centre of gravity location

Hello, I am new to this forum so bare with me. I am currently designing a flying wing electric powered R/C model glider. This is a follow on from my first attempt at a tailless model (with no vertical surfaces) which I am currently flying. (see picture) I have been trying to get an accurate...