> Anybody selling a 20B pusher mount?  My velocity airframe is
complete(!)
     > and i am gearing up for engine and instrument install.  Al Gietzen
     > modified a Franklin mount, but my welding skills are...subpar, to say
     > the least.
     >
     > Also, I have decided to go turbo, not supercharger.  What turbo did
Tom
     > Parkes use on his ES and what is the latest version of the
     > turbocalculator spreadsheet program?
     >
     > jeremy solomon
     >
     > Jerry Hey can build you a motor mount. Make a sketch of the
     > firewall hard point locations and the distance from the firewall
     > to the prop flange. We have a few designs but we need to double
check.
     >
     > Do you have your turbo and water cooling plumbing decided? You should
     > do that before a motor mount can be designed and built. Here are a
few
     suggestions. Do you have 3D drawing capabilities? If not I  suggest
making
     > foam mock ups of all the parts and located them before proceeding
with
     > the motor mount design. I'll do a 3D for free after you decide where
     > you want to put things and you have a turbo manifold and waste gate
     > chosen.
     >
     > Tom Parkes can answer the turbo question.
     >
     > Here is Dave Leonards turbo calculator but I am not sure it gives
     > you enough info to insure the turbine will live under aircraft
     conditions.
     > At least half a dozen car turbos have been destroyed so far.
     > You are much more likely to get the turbo to live if you use an
     > aircraft turbo. It's a long story but car turbo charger can be
     modified
     > to slow the turbine so they will live. Easier to find an aircraft
turbo
     > and use it.
     >
     > Paul Lamar


     Paul, are there excellent SolidWorks files available such as a
     tractor driven unit 13B that I could adapt to a super cub/Patrol
     frame?.  We have solidworks, and if there are some time saving work
     already done, I would provide feed back when a new or different mount
     would be drawn up.

     The drawings/modeling of the 20B for the pusher were good and made me
     think there was others already out there.

     Scott

     Sure Scott. The files are too big to email so I will set up a download
     area on the web site with a stp file.

     RV4's are about the right width so one of these might work.

     I'll take the RV4 landing gear tubes out.
     Give me a day or so.

     Paul Lamar

OK it is not as big as I thought so here is a stp file zipped
that will load into Solid Works.

Paul Lamar


This guy is advertising a complete 20b fire wall back setup for a Velocity:
Jim, Charlotte, NC ph 828.361.2621, email jcad@wnccl.com

Ernesto

I am once again overwhelmed at the generosity and engineering talent
that is available on this site!  Ask a question and people jump in to
help out.  A special tip of the hat to Paul Lamar for all of the time,
expertise and good humor you devote to this very valuable resource.

I noticed that the turbo calculator specified 4 injectors for the 20B
rather than 3 or 6.  I realize this parameter can be altered but was
this a mistake or did i miss something?

First thing monday i start shopping turbos and intercoolers using Tom
Parkes Garrett TE06 1.58 as a baseline.  As to your suggestion to mock
up the bits first, my plan is to (try and) mount the intercooler on top
(like the mini cooper S), or to the cool side of the engine.  Since the
firewall is more than 4 feet across, I figured that i could always
jigger the turbo &tc around the mount tubing and my coolant radiator
dimensions would be dictated by the space between the lower legs of the
motor mount.  The large sloping cowl and ample wing armpits allow plenty
of room for intake wedges/scoops to feed the various heat exchangers and
intake.  The oil cooler in the Velocity is in the nose, although i might
need a secondary.

i plan on bringing a checkbook and little financial good sense to Sun n
Fun to buy my instruments this spring.  After a long dormant period, i
am now making really serious progress on this plane and hope to have it
flying in another year or so.

jeremy solomon

Dave Leonard did that spread sheet. Perhaps he will clarify.

Here are some pictures of a very successful pusher cooling system


Paul Lamar