Challenger 15

[richardm]

Hello fellow Stunt Pilots

I have a Challenger 15 plan, I love the look of it, I have been wanting to try a modern 15 powered model for a while, power will be an OS Max 15, another is being powered by an LA15 ( a friend is also building one)

One thing I cannot see where the G of G is on the plan, any hints out there?

[wwwarbird]

 Hello Richard,

 I can help you out on this one, give me a call @ 507-402-4050.

 

[richardm]

Hi Mr WWWarbird

I am on the other side of the world Auckland New Zealand.............I may have to work out time zone differences

[wwwarbird]

Hi Mr WWWarbird

I am on the other side of the world Auckland New Zealand.............I may have to work out time zone differences

 Ok Richard, I didn't realize that, check your PM box here. 

[Dave Hull]

You might also compare it to the full-sized Challenger. If it is geometrically scaled, you can use that as another suggestion. On that one, the "balance line" is shown just behind the main spar. You can view those plans on-line to get the idea.

Perhaps the best way to do it, though, is to calculate the position starting at 15% of the mean aerodynamic chord. You might start at 12% and start walking it back during trimming. That should be safe.

Dave

[wwwarbird]

 Dave,

 The Challenger .15 has no connection to the full size Challenger, the .15 is an original design by Keith Sandberg. I've sent a PM to Richard giving him all the information he should need. Thanks anyway. 

[Gordan Delaney]

Hi Dave,
I designed the big Challenger. I also built a .15 size also. I ran a modified ST 15 that would run with the Rossi at that time.Just a little history is all.

Gordan

[Dan McEntee]

  Man! There have been a lot of Challengers! Wayne built a .40 size version of the .15 model he is talking about. Dick Sarpolous published a profile model using a SIG Chipmunk wing that was called Challenger.  I have a kit and plans for another Challenger that was by Bill Noyse? I probably have that last name wrong, but something like that.
  Gordon, where can I find a picture of yours?  This calls for a contest called "The Challenger Challenge," where you have to fly a model called Challenger! If I ever design a new model of my own, I'll take that name off the list of possibilities.
   Type at you later,
  Dan McEntee

[GregArdill]

Hello Richard,

 I can help you out on this one, give me a call @ 507-402-4050.

I'm just curious why you simply can't give a dimension.

If that info is omitted from the plan it would point out a deficit of a rather important piece of data.

[Tim Wescott]

  Man! There have been a lot of Challengers! Wayne built a .40 size version of the .15 model he is talking about. Dick Sarpolous published a profile model using a SIG Chipmunk wing that was called Challenger.  I have a kit and plans for another Challenger that was by Bill Noyse? I probably have that last name wrong, but something like that.
  Gordon, where can I find a picture of yours?  This calls for a contest called "The Challenger Challenge," where you have to fly a model called Challenger! If I ever design a new model of my own, I'll take that name off the list of possibilities.
   Type at you later,
  Dan McEntee

If we start insisting that models have unique names, this could get bad.

There may be a model named -- "The Anteater", even.

[Gordan Delaney]

  Man! There have been a lot of Challengers! Wayne built a .40 size version of the .15 model he is talking about. Dick Sarpolous published a profile model using a SIG Chipmunk wing that was called Challenger.  I have a kit and plans for another Challenger that was by Bill Noyse? I probably have that last name wrong, but something like that.
  Gordon, where can I find a picture of yours?  This calls for a contest called "The Challenger Challenge," where you have to fly a model called Challenger! If I ever design a new model of my own, I'll take that name off the list of possibilities.
   Type at you later,
  Dan McEntee

Hi Dan, I flew the 15 Challenger during the early 70 s into the early 80s it had 300sqs. and I flew it with the G15 teens with the red venturi`s. It looks like the 35 planes the I flew early 70s. Hope this helps.