Paul,
I meant to say BD4 to 13B mount plans available?
Ben Lane
Can you tig weld?
No plans but I can send you tubing lengths for our universal
mount.
Here is a universal mount on a Tango.
The universal mount eliminates the need for a welding jig.
Paul Lamar
Hey Ben Lane,
I am working a BD-4 project and also seeking the BD-4 to 13B mount. I can TIG weld. Feel
free to contact me directly regarding the BD-4. I'm in Auburn Nebraska (that's 60 miles
south of Omaha).
John Lindinger
N1404A 1951 Tripacer 125HP (Flying)
[Unregistered] BD-4 0HP (Project)
1993 Mazda RX-7 350HP Single Turbo Mod (Daily Driver)
John, I don't publish the phone numbers and email adress
to discourage the bots but will forward the info in
private email to anyone that request it.
Paul Lamar
I will @ some point John. thanks
Ben Lane
Paul, What happened to the robo welder? Maybe he wasn't on list for that.
Might be easier to do them a batch job of bd4 mounts.
C Smith
I still have it. That is an option to welding it yourself.
Ben, Craig is referring to a machine I built
to weld fittings on the end of 4130 motor mount one inch round tube
members automatically. It only works for the round tubes.
There are two one inch square tube ends in each mount that must be welded by
hand. My part time welder can do that for a small charge but any person that
tig weld can do that rather easily.
Here are some pictures.
Paul Lamar
Ben and John,
Here's my BD-4 with Renisis engine mount. I had it made by Jerry Hey, and unfortunately
the air-frame side wasn't exactly like the plans and the mount didn't line up. I had to
cut off the upper arms and make an elaborate jig to capture the holes and angles. It took
a few tries but I got it to fit. I'm still trying to decide on a cooling system and
exhaust arrangement, that can be upgraded to a turbo in the future.
Kevin Bell
Halifax, Canada
Sorry to hear that Kevin. Jerry did not always get it right.
That was one incentive for developing the universal mount
that is adjustable to fit.
The tunning is for rather low RPM based on the looks of the
intake runners.
Paul Lamar
IMHO Jim Bede was genus aircraft designer. He does however
do certain things differently. The motor mount hard points
on the firewall are an example that may have to be modified.
If you have not drilled the 3/8th holes yet we are home free.
If you have they may be too close to the wall of the tube to
accommodate the rod ends of the universal motor mount.
In any event an adapter can be welded up. By me or otherwise.
Paul Lamar
Greetings Paul,
I will receive my plans next Friday for the BD-4.
You know i have researched quite a few aircraft and built a Bearhawk LSA fuselage. I
traded that fuse for a 200hr SMOH Franklin 90HP (4ac-199). Upon disassembly the crank
journals are scored. Turning, .010 bearings, lightspeed mag, rings gasket set, were priced
and considered.
What a joke. The price for the Franklin overhaul will buy a (nearly) Renesis crate short
block.
I am interested in the universal mount, the massive aluminum plate for the front mount.
The rod ends are a very good idea.
Will be following along, thanks for your answers.
Compared to the BD4 the Bearhawk is a relic.
Ben Lane
I have a set of BD4 plans so we can compare notes.
I was thinking a set of 4130 tabs bolted to the
side walls of the rectangular extrusion with four 1/4 inch bolts
is about all that is required for the rod end mounts. No welding
required. AC Spruce sells 2 inch wide .063 thick 4130 straps
6 feet long for $10. We can whack those off to the right
length (about 2 inches) with a friction blade. I'll do a 3D shortly.
This is what we use now for traditional simple hole hard points
in the firewall.
Paul Lamar
