|
|
Bill,
I used Van's drawings to enter engine mount dimensions into Intellicad (open
source Autocad clone). Was somewhat successful - biggest problem is that
front and side views of gear legs (and sockets) are never shown in "full
size". I used CAD to get "auxiliary views" of the gear legs and check
various things. Was really hard for me to learn, and very painstaking. (I
had custom RV-4 "long gear legs" bent with RV-6 axle angle, and bought
partial engine mount for -6 with -4 gear leg sockets. Used CAD to give me
the increase in wing incidence in 3 point attitude.)
- Just call Van's and get them to tell you which full size dwgs you need
to buy from them - about $5 each IIRC.
- Maybe they'll give/sell you the RV-7 CAD dwg(s) - I doubt it, as they
sometimes invoked "proprietary info" on some of my requests. The dwgs
for -6 were manual. I think most dwgs for -7 are on CAD.
David
----- Original Message ----- From: "Bill Dube" <bdube@al.noaa.gov>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, December 02, 2004 6:58 PM
Subject: [FlyRotary] Stock Engine Mount Drawings???
Does anyone have an accurate drawing of the stock engine mount for the
RV-7? A CAD drawing would be even better.
The reason I ask is that I am planning to design and build my own engine
mount, and I would like to "reverse engineer" the stock engine mount.
In addition to simply copying the location of the gear sockets, etc, my
plan is to do the structural analysis (FEA) on the stock mount to see how
strong it is and what loads it was designed to take with the stock engine.
While it would probably be possible for me to borrow a stock mount from
someone at my local EAA club, mechanical drawings would be much easier
than
painstakingly measuring each dimension and drawing it all from scratch.
|
|