REFLECTOR: O-540 or IO-540 on a 173

Scott Baker sbakr at comcast.net
Sun Apr 30 06:26:05 CDT 2006


Yes - I'd say there are about a dozen V173 aircraft with the IO-540D (narrow
case, parallel valve, stock 260hp model) and at least one with the IO-540K
model (heavy case, angle valve, stock 300hp).  Velocity, Inc. has an engine
mount/installation kit for the 260-hp version.  Most installations require
ballast in the nose to satisfy W&B concerns.  I've seen weights differ from
20# to 50#.  If you plan on using a 6-cylinder, place as much equipment as
you can in the forward nose compartment.  Moving the battery even a small
amount forward helps.  Be sure to use the XL size NACA cooling system if you
are using the roof top vents.
The engine installation is a tight fit.  Some cowling modifications will be
needed.
Scott B.

----- Original Message -----
From: "Steve" <steve_beilby at yahoo.com.au>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Sunday, April 30, 2006 3:45 AM
Subject: REFLECTOR: O-540 or IO-540 on a 173


> Is anyone flying with an Lycoming O-540 or IO-540 on a 173 (aka
> longwing) ???
>
> Looks like the 540's are a bit heavier than say the Franklin ~25 lbs.
>
> Any weight and balance issues ?
>
> Steve
> _______________________________________________
> To change your email address, visit
http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!  www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html



More information about the Reflector mailing list