Are you using LineII?

[Bob Reeves]

First if you aren't I feel you should but what I am really looking for is input from those that are actually using the program. I have decided to write LineIII mainly because I feel it can be made much more user friendly for us that don't speak in metric. Thankfully Roger V. has volunteered to help with the calculations and I can handle the programming. Am attaching the first (rough) draft of what I have in mind for your scrutiny.

As you can see I simplified the input data, eliminated some of the parameters that I always leave at the defaults and everything is in US units. I am also leaving out a few of the calculated results because they never meant anything to me anyway.

Being mostly a Stunt flyer and not understanding or caring what "Handle angle" is (Think it has something to do with whipping for speed flyers) I was wondering if I may be missing the boat someplace and leaving out something that might be important to someone besides Stunt flyers.

Also, just how important is it to be able to input data and see the results in metric? It could be done but would really make my job allot harder. Suspect this is part of the reason save and open doesn't work real well in LineII.

Please understand I am in no way downgrading LineII, it works and works well. The author did a great job for a quick and dirty user interface, I just want to take it to the next level.

[Jim Pollock]

Bob,

Well, not really.  I do however use the graphs in Bill's article.  Control Line Aerodynamics made Painful  , errr,  ahhh, Painless    that is!!  I will definitely get your line III and use it however!!!!

Jim Pollock, Ahhha - who did I say I was??  

[Bob Reeves]

Here is the latest incarnation. Almost none of the underlying calcs are in it yet, going to be the fun part 

[RC Storick]

Where do I get this program?

[Bob Reeves]

When I get it finished I will upload it to the web and post a link.. It will be freeware..

In the mean time LineII can be downloaded from here..

http://marlongofast.tripod.com/pdf_files/TwoLineDrag.htm

[proparc]

Bob
Great effort on III. The only thing is that the difference between say; a 1.75" airfoil like a Nobler and a 3 inch airfoil like a Patternmaster makes a HUGE difference in drag and power required. That is why I have not bothered with most of these types of programs up to this point.

.5 horspower , or your typical 40 will easily take care of a Nobler.  You need about 1 horsepower to EFFECTIVELY deal with a Patternmaster. 

[Bob Reeves]

Bob
Great effort on III. The only thing is that the difference between say; a 1.75" airfoil like a Nobler and a 3 inch airfoil like a Patternmaster makes a HUGE difference in drag and power required. That is why I have not bothered with most of these types of programs up to this point.

.5 horspower , or your typical 40 will easily take care of a Nobler.  You need about 1 horsepower to EFFECTIVELY deal with a Patternmaster. 

Ya, might not leave the HP field in the final version.. All it represents is the line drag which is all that is needed for leadout calculations. I thought it interesting so displayed it but I can see it's already confusing the issues. Might just change the label so it better explains what that number really is.