Center of Gravity for Delta wing ???

Could someone be kind enough to tell me how to calculate the CG of a Delta wing such as is used on the Convair F-102, F-106, and B-58 Hustler...This is a triangular wing that has a tip cord length of zero...

I have no problem calculating the CG on tapered wings, but I don't trust my findings on a Delta...Just doesn't look right...

Thank you for your time and consideration...

Jerry Hall
View complete forum thread


Related threads

CG on delta wings

Hi All I`m busy building a foam delta wing jet. Where would the center of gravity be ? In the middle of the wing or do we go for 30% from the front of the leading edge of the wing ? For some reason i think the CG must be right in the middle of the wing. Help much appreciated Thanx

Not modeling science exactly...

... in wind speed which, he shows, in theory would affect the circulation around the wing, leading to a variation in angle of attack ... a reference, I know who's looking over my shoulder saying, "Stop that!" I just thought the Modeling Science community might be interested--I hope my brief synopsis did ...

Cool Android Phone App - Center of Gravity Calculator

... is a free Android Phone CGC (Center of Gravity Calculator) for planes. It will calculate the position of the center of gravity of an airplane using the tip chord, root chord, sweep and required CG in percent, measured back from the leading edge at wing root. It's free, released as ...

Discussion Cutlass jet center of gravity?

... nice stable design with that fat wing and huge vertical stabs. ... pretty much scale. Can't find much on the center of gravity location. I found this flying wing CG locator ... triangle up front, and the cutlass is pretty much flat up front where the wings hit the fuselage, should I use their figure ...

Flat plate Delta wings & differential

Hi, Have built an 'Estrados' (see 'Foamies' forum) Flat plate Delta wing planform, controlled with 'elevons' & rudder (3mm - 1/4" upward reflex on elevons). Finally got the CG sorted out and set but now comes trimming. The rolls are awful - very slow and ...

CG Position for Delta Wing

Hi Guys I've made a small Delta winged aircraft with an SC .25 engine on the front. It is attached to a dolly which will ... the actual zero-fuel CG position. The first image shows the AC point without considering the fuselage as part of the wing area. The second image includes the fuselage as part of ...

Rule of thumb for center of gravity

What is the rule of thumb for determining the center of gravity for any given plane? (Aside from this problem, I'd like to know, there has to be a formula for determining the CG on any given plane.)) We were putting floats on an Avistar yesterday and set them ...

Spoilers on a Delta wing?

Am flying a Electric simple flat Delta wing and Am trying to find a way to slow down the speed when landing. High Alpha works but it's ... combination of thrust and alpha. What would be the effect of putting spoilers on a Delta Wing? Is there any other way to slow it down? //Johan

Question Delta Wing Fin Size

Is there a rule of thumb for the size of the vertical stabilized for a delta wing ?? The stabilizer will be closer to the c.g than other wings designs, and probably need ... to be larger than 10 or 20 % of the wing area. Anybody know what rule of thumb to use ?? What % of the wing area ? TIA, Marion

Discussion why doesn't U.S. develop delta wing aircraft?

was reading article on nato in libya and saw picture of european jet. why doesn't the US military develop delta wing aricraft? what are the tradeoffs between delta wings and the delta-ish or trapazoid wing and tail aircraft the US military uses (f-15 below)?

Why swept or delta shape flying wings

... design questions - For model airplanes - why do Zagis and other "flying wings" have swept wings ... make them more effective as fins? Is the shape of a delta wing aircraft related to the shape of a swept flying wing? ... work better than a true triangle? What is a "true flying wing", does it omit winglets? ...

Aristo-cat C.G. question

Aristo-cat C.G. question I have the original article from Model Airplane News circa 1964 and ... to the original draftsman for the plan. Problem? There is no center of gravity shown nor mentioned anyplace. I ... of similar size and power. 'cept he moved the wing forward a good two inches. This ...

Wing twist calculation

I'm working on a scale model of the WWII 'secret project' Junkers EF-128: Rather than rely on my usual TLAR (That Looks About Right) design method, I thought I should throw some 'science' at working out the required wing twist I'm looking at the calculation method on this ...

Cranked Delta Flat Plate Aerofoil

... small depron flat plate model powered by an internally mounted ... alpha manouvers. I have redesigned the model with a cranked delta wing in an effort ... cousin. Any info from those in the know would be appreciated. As its a simple model I ought to just make it and try it but I kind of want to understand ...

Circular Wing Questions

... diameter would be for a nice flying circular wing? The equipment with be mostly from a crazy max ( ... 8cell 5/4s, and micro radio setup). The wing area on the crazy max ... someobody may want to check my math). Also...does anybody have any advise on center of gravity? I'm really in the dark here. -Brett

Wing position related to stall likelihood?

It seems to me that the more forward the wing is, the more likely the plane is to enter stall if an abrupt pitch occurs, assuming the center of gravity allows for hands off upright and inverted flight in all cases. Is this true? John

How to find Center of Gravity?

... by somehow taking the chord at the tip and the chord at the root of your wing and then drawing a big X.. but I forgot how to do it.. can anyone explain it please? I known on an airplane with a hershey bar wing you find the center of lift first and then go 30% back to find the optimal cg. Does the ...

C/G %'s for different types of wings??

I've found a site to figure my C/G on scratch built models and its fine for a regular wing, at 30%. But I have to enter the correct % and it tells me where it is in inches. Is there any info on what % to use for what tyoe of wing( like delta or swept)?? I'm putting a microjet together and the C/G is ...

Diherderal in low-wing RET

... about to figure out how much to use? Does it have something to do with fuselage height? Vertical center of gravity? Should I stop kidding myself, throw ... elevator and throttle plane and move on? Here is the body so far.... and half a wing... (unglued) as I have not received your advice yet! Daniel ...

location of throwing peg?

... to install a throwing peg (actually a plate). The wing tip panels have a full height balsa ... transfer the force best, but would mounting it ahead of the center of gravity result in more stable ... perpendicular line would run through the center of gravity of the model. Any other comments or suggestions?

Mini-HowTo How to test a model plane on the ground

... plane before you maiden it, risking a crash. You will be interested in the Center of Gravity, dynamic stability ... 25mph to test it. Make a bigger model of your design with the same weight, tie ... for free flight tests of the actual model. (I do not have extensive experience with all the cases ...

Discussion NASA says lift from air shoved down - can we trust NASA?

... magnitude and a direction associated with it. Lift acts through the center of pressure of the object and is directed ... can deflect a flow. For an aircraft wing, both the upper and lower surfaces ... (basically, what we were all taught up through 1990) - and as this is a modeling science forum, I thought ...

Center of Gravity

With pusher models does center of gravity changes when its under power vs. when its gliding? Is CG different from not pushers at all? Sorry if this ... for CG somewhere on the web, could anyone point me to a good one? Or maybe it is much easyer to find the cg just by test gliding the model? Thankyou

taildragger canard?

... a canard with a taildragger landinggear with the wheels near the center of gravity? thus not a rutan-quicky but how far aft can you go with the landinggear? taken in account canard lift ... thrustline, airfoilmoments, wheeldrag, etc. i have the book model airplane design by andy lennon, ...