DOC's Jumbo

[john e. holliday]

In one of the threads the Jumbo was mentioned.  As I don't think I had documented it, I finally got out and took pictures plus measurements.   Not as big as I remember.  So I set the ISE next to it.  And that is a Fox .45 with control line venturi.  Weight is in the 60+ ounce range.  I did find that I have a few hinges to fix on the stab/elevator.

Wing:63" span   chord 11.5"
Flaps: 29" with 5" tapered to 3.5"  both of them
Stab/elevator:  31" span
Stab: center 4" going to 2 1/2" at tips
Elevator:5 1/4" going to 4" at tips.

Hope this helps for anyone crazy enough to build one.  The original was flown on 100 foot lines with McCoy Redhead .60 speed engine.

[Randy Powell]

Them are some big flaps!

[Eric Viglione]

Now THERE is a candidate for an adjustable slider elevator horn!!!!!  

Looking at the picture laying on its back, it looks like the elevator horn is exposed now that I look at it. Either way, probably going to want to dial out a bunch of those bad boy flaps!

EricV

[EddyR]

The designer must have been thinking if a little is good than a lot should be wonderful So he made everything big. Did the article mention flying on long lines or is that another big plane article
Ed

[john e. holliday]

By the way full movement is about 20-25 degrees each way.  It will turn very quickly if you pull hard enough.  Really doesn't take that much tho.