Paul,
What would you recommend for a conversion from the 540 engine /
gear
mount to a 2 or 3 rotor turboed mount for the F1 Rocket?
Possibly use a
secondary mount ( ala Tracy Crooks original RV4 ) although a
little
heavier?
The mount has already been drilled and is presently on the bird and
waiting for a 540 or the switch to rotary.
Also, would it be possible to have the radiator and oil cooler
EXITing
air out a left side duct with the turbo heat and exhaust for
better efficiency? (Fuel lines at the bottom center of firewall.)
Thanks,
David Deffner
ps. I enjoy my rotary time on the ground in SCCA and NASA events.
Tracy has moved away from that type of mount as it is more
expensive
to build and heavier than a simple mount that uses the firewall
hard
points.
If you send me a sketch with dims of the firewall hard points I
will
design a mount for
you. Also send the thrust line height dimensions and off set angles
if any. I will also need to length of the cowl from
firewall to prop flange opening. Pictures would also help.
It is possible to let the cooling air out the left side but it is
not as efficient
as letting it out the bottom or the right side. Obstruction to the
exit air from
the heat exchangers is not a good thing. That is not to say louvers
on the left side are not a good idea to cool the turbo. They are.
Paul Lamar ...No rotor no motor.
Paul,
You're very gracious and I will take you up on your designing a mount
before you change your mind. Until I have a chance to get you all
those
dimensions, more pics than you probably want to see are available on
Vince Fraziers site www.vincesrocket.com
<http://www.vincesrocket.com/> and
F1 Rocket www.teamaircraft.com <http://www.teamaircraft.com/>
Do you have a fax number I can send the sketch and dims to? Some of
that Hi Teck stuf hasn't made to some parts of Texas yet.
V. Fraziers is a Harmon Rocket II with some of the F1 parts such
as the
cowl.
Space is about the same as Tracy C. RV8 3 rotor, but with the gear
sockets crowded in there.
On building up a 3 rotor, does a true 3 housing have two or four
exhaust
port studs? And is there enuf material to drill and helicoil four
studs
per port on a 2 rotor housing?
I don't like exhaust leaks!! I recall some of the racing 3 and 4
rotor
motors having some trouble with exhaust leaks?
Thanks again,
David
No fax but you can mail it to me at:
830 East Santa Maria St.
Suite 303 <<<<<<<<<<< very important
Santa Paula
California
93060
All three rotor engines had the 2 stud arrangement just like the 2
rotor.
In fact they used the same rotor housings I think.
Yes there is enough meat to drill and helicoil.
What we do with the landing gear type motor mounts is cut away the
tubes we don't use and keep the rest. Cheaper and quicker.
Here are some pictures of a mount that Jerry Hey built.
Paul Lamar ...No rotor no motor.
Just one correction, Paul. I did only one engine mount by cutting
up an existing mount. I did not like it at all and would not go down
that path again. The mount you have pictured was made from scratch.
Jerry
What was the problem? The time it took to grind off the remains of
the cut tubes?
I can see how that could take some time.
Paul Lamar
Grinding of the remains of the cut tubes is a problem because a bit of
the original tube must be left as grinding into the parent material
is not acceptable. So we are left with little stubs pointing in the
wrong direction and in the way when it comes to positioning the new
tubes. If the Rocket uses RV4 gear mounts, then it would be better to
start over but if a gear mount is not available there may be no choice
but to use the old mount as you have suggested.
BTW, I don't feel it is damaging to completely grind away the remains
of the cut tubes off of the gear sockets. That material is plenty
heavy. But it is "traditionally" not done. Perhaps the owner could do
that part and send me the gear mount ready to go. Jerry
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