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Aerobatic Tandem Two-Seater

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Radicaldude1234

Well-Known Member
Joined
May 30, 2009
Messages
430
Location
Front Range, Colorado
So personally, I think the CAD exercise at my other thread https://www.homebuiltairplanes.com/forums/showthread.php?t=28640 has run its course. I can finish the model, but as I have no desire to build a P-51 replica given there is no viable engine and there are a bazillion of them around anyways, I've decided to go back to a design that I've been working on awhile back.

This is my second draft of the design using the techniques I've learned in the aforementioned thread.

Intended Equipment:
-Engine: (I)O-470 in prototype. IO-520/IO-540/IO-550/IO-720 in later versions. Maybe O-360 in fixed gear version
-Avionics: IFR Capable
-Other: Retractable Landing Gear; electric or electrically powered hydraulics

Goals:
-Performance: 7.5G Load limit; However fast a 230-300hp engine will take it; <55kt stall
-Crew Accommodations: "Functionally Comfortable" cockpit (28" wide at shoulders); Harmonized control system; Sliding Canopy
-Ease of Construction: ~1000hr build time; Composite cowl; Sheet metal construction for majority of airframe

First Pass Design:

2016_0616_1.jpg

2016_0414_3.jpg

Personal Critiques:

-Too blocky
-Canopy could have caused aerodynamic issues
-Slab sided fuselage looks awkward

Second Pass (Current) Design:
2017_1125_Shape.jpg

2017_1124_FrontRetake2.jpg

2017_1125_SizingStudy.jpg

More to come....
 
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