I'm new to the hobby, and I just did the jump from a 1m DLG to a 1.5m. Although they have the exact same wing loading per dm², the 1.5m is so much more floaty, and the wing cube loading perfectly captures that. When I look up potential future glider models for me, I put them in a list with their wing cube loading besides them. Its such a helpful indicator. It should be added by more manufacturers to provide more context for each model...
I've been designing and building simple foam board models for only a couple of years and it was a game-changer for me when I found out about cubic wing loading. This video is the best I've seen for explaining how the CWL gives a far better indication of how a plane will behave than the simple wing loading. Thank you for making it. Another area I hope you will address is that of model aircraft stability. For example, how does the surface area of the horizontal and vertical stabilizers and tail moment (?) affect the stability? I've had my share of problems in this regard. Thanks again for your videos.
Would highly appreciate if you could do a video on various methods to join wings with fuselage, specially for larger models. Thank you for continuing to create awesome content. No channel provides such education
I think another important factor is the moment of inertia. You could have two planes with the same WCL and CG location but might fly differently depending on how the masses are distributed in the aircraft. Theoretically longer aircraft with high MoI are more stable.
Good video but I was hoping you might discuss the most important bit, the formula to calculate it :) Perhaps I'm more of a geek than most people, but you did include a link to an online calculator in the description so all good ! .. That said, I do find it useful to learn about the maths behind these things :) Anyhow, best wishes and thanks again :)
Ya, I appreciate the real world numbers BUT never really got around to how they are calculated. And a quick run with mr google gives an RCcalc forumla of WCL = Takeoff weight / (wing area/144)^1.5 Ya, that's not muliplied by 1.5 its to the power of, like squared by but not, it's 1.5 instead. A y^x kinda thing. Okay, well you are dealing with Reynolds numbers and air molecules, which are constant, and wing sizes that although they are smaller at the same oz/in, air molecules are not. Did they just take a stab at it by looking at easy fliers compared to ground huggers, coalesced the data? Maybe. Certainly get enough examples in this video without the calculations AND maybe thats a good thing. Don't need to know HOW they came up with Pythagorean's theorem, just had to pass my Trig test with it. Gotta tell you how many times I used that bad boy in real life. 2, the number was 2 and I'll thank you to stay out of my personal business.
Dag your series is just great! When you measure the wing area used to calculate the cubic wing loading should you include the area of the fuselage and elevator or just the main wing? My impression is that you are just using the main wing area for the calculation.
Maybe I'n misunderstanding you, but you say that the 40" span plane (your Sukoi example) has a wing area of 800 sq" and 10 lbs weight. That would require an average 20" inch cord to get 800sq" on a 40" span?
@@dagtheaviator that's what I figured, that span is common for me so I know the common dimensions / weights well. Some of my racers that I have/building are in the 20 wcl area. Always wanted to build bigger to get that number down but that means a whole different electronics package.
I'm new to the hobby, and I just did the jump from a 1m DLG to a 1.5m. Although they have the exact same wing loading per dm², the 1.5m is so much more floaty, and the wing cube loading perfectly captures that. When I look up potential future glider models for me, I put them in a list with their wing cube loading besides them. Its such a helpful indicator. It should be added by more manufacturers to provide more context for each model...
I've been designing and building simple foam board models for only a couple of years and it was a game-changer for me when I found out about cubic wing loading. This video is the best I've seen for explaining how the CWL gives a far better indication of how a plane will behave than the simple wing loading. Thank you for making it.
Another area I hope you will address is that of model aircraft stability. For example, how does the surface area of the horizontal and vertical stabilizers and tail moment (?) affect the stability? I've had my share of problems in this regard. Thanks again for your videos.
I am working on a video that cover airfoil, incidence, and stability. :)
My rc plane wing loading is 18,is it good for my turbine jet rc plane
Would highly appreciate if you could do a video on various methods to join wings with fuselage, specially for larger models. Thank you for continuing to create awesome content. No channel provides such education
Great suggestion, and thanks! Rock ON!
I think another important factor is the moment of inertia. You could have two planes with the same WCL and CG location but might fly differently depending on how the masses are distributed in the aircraft. Theoretically longer aircraft with high MoI are more stable.
Great point, I totally agree. Rock ON!
5:51 how to calculate thrust needed?
I am working on a thrust video. I hope to post it soon. Rock ON!
Good video but I was hoping you might discuss the most important bit, the formula to calculate it :)
Perhaps I'm more of a geek than most people, but you did include a link to an online calculator in the description so all good ! .. That said, I do find it useful to learn about the maths behind these things :)
Anyhow, best wishes and thanks again :)
I added a few links which may give you the answers your looking for. :)
@@dagtheaviator .. Thanks ever so much Damon :)
@@freezatron Rock ON!
@@dagtheaviator ... just a moment, I'll get my guitar !! :D
ua-cam.com/video/REa8nc4eUbg/v-deo.html
Ya, I appreciate the real world numbers BUT never really got around to how they are calculated. And a quick run with mr google gives an RCcalc forumla of WCL = Takeoff weight / (wing area/144)^1.5 Ya, that's not muliplied by 1.5 its to the power of, like squared by but not, it's 1.5 instead. A y^x kinda thing.
Okay, well you are dealing with Reynolds numbers and air molecules, which are constant, and wing sizes that although they are smaller at the same oz/in, air molecules are not. Did they just take a stab at it by looking at easy fliers compared to ground huggers, coalesced the data? Maybe. Certainly get enough examples in this video without the calculations AND maybe thats a good thing. Don't need to know HOW they came up with Pythagorean's theorem, just had to pass my Trig test with it. Gotta tell you how many times I used that bad boy in real life.
2, the number was 2 and I'll thank you to stay out of my personal business.
Dag your series is just great! When you measure the wing area used to calculate the cubic wing loading should you include the area of the fuselage and elevator or just the main wing? My impression is that you are just using the main wing area for the calculation.
Thanks! For me, it's just the wing.
Is WCL kg/m3 or is it ib per cubic feet. And is 60 kg/m3 too high wing loading?
I believe its cubic feet. I am not sure about metric. I will try to see if I can get you a better answer. Thx, DAG
Maybe I'n misunderstanding you, but you say that the 40" span plane (your Sukoi example) has a wing area of 800 sq" and 10 lbs weight. That would require an average 20" inch cord to get 800sq" on a 40" span?
Good catch. I messed something up. The math is right, the span is wrong! My mistake.
@@dagtheaviator that's what I figured, that span is common for me so I know the common dimensions / weights well. Some of my racers that I have/building are in the 20 wcl area. Always wanted to build bigger to get that number down but that means a whole different electronics package.