Yamma-Fox

I always liked the idea of Jabiru, but research (in terms of reliability) kept swaying me away.

Anyone here swear by them... I mean in a good way...  not "swearing" while  standing "by" them

Yeah I also made up my facebook alais (Anatoli) for keeping in touch with this hobby ONLY.

Otherwise I really am an anti-FB guy too!

Thanks guys!

I didn't use a jig, just built off the firewall with oversized tube (3/4") at the bolt up locations to allow for a little warpage and got lucky... things only moved about 1/4" so those small mounting bolts are just a little offset in the 3/4 tube.  I will custom grind some brass bushings to fill the "eccentric" gap (see photo of the off-center gap below).

I really wish I could scan this thing to a file in order to share it for anyone else with a KF 5-7, but I just don't have acess to something like that.

Getting ready to put all my pieces together!

I finally got my big parts together, ending today with getting my mount back from the welder and powdercoat guys.

Below is a pic of the "big 4" custom components in a Yamaha conversion:  Motor Mount, Airbox, Header, and Throttle Reverser.

Anyone else following in my footsteps will have an easier job these days because we have a lot of people in the Yamaha community who have stepped up in offering help with these and other fabricated parts.  For more info, including contact info for FWF parts, join up in the "Yamaha Aircraft Conversions" Facebook group.

  Nope!

But I've got big ideas about going up to our Lake of the Woods island property with this puppy.

I tell you that but the Lake Amphibian my dad and I own only gets up there every few years... and it has 4 seats and a huge cargo bin!

So I'm sure it'll just  be a novelty of a trip for the KF!

My plan is to go with the uavionics skybeacon and rewire my (all led) nav lights to my radio master so I don't forget to have it on.

Anyone here actually running the skybeacon?

Your a tough SOB Ed!   I remeber you've been through a lot in this life, but maybe that was all special training for this big fight right now.

This one's been extra tough but I'm not worried!   See ya back here soon!

Yeah wow!  Jim grab it and put an Apex in it.  Some big tires, a $5k panel and you could flip it for big bucks!   

That is, If you still want to sell after you find how much fun flyimg it is!  

The one simple tip I've got for ya (after a couple ground loops of my own early on) is to chant in your head "go around... go around.... go around" as you come down to touchdown.

If it doesn't setlle on just right... or if it gets the tiniest bit squirreley on rolllout,  put some power in (bringing the tail back to life) and go around.

With that in my head (cocked and loaded to go around) I haven't had any further stories to tell...  but I have gone around plenty of times! 

Yep, yep, and...  YEP!

Thanks for the thanks!  I'm just glad if I can help other people out (half as much) as I have been helped along in this project!

That R1 box has only been used by one other AFAIK.  That is "Yooper Ed" here in the group, but he doesn't frequent the forum often.  According to him, it merely required a jetting change (he drilled out his main jets to about 180 size) and he says it runs great.   His info is why I chose the R1 box but if you have room you that snowmo airbox will work great as well.

But as far as the jetting / tune, no matter which airbox you choose,  you will have some fine tuning to do and really should run an AFR guage to get precise jetting for your particular setup since it seems each plane runs just a titch different due to ram air effects and exhaust system differences.  Just be  sure you dont run avgas on the AFR's O2 sensor!

Hey, start up a new post with your motor project!  I'm really looking forward to seeing it come together!!

Damn.  I was looking for a good new cheap and available psychotropic.... all the other good ones have been banned.

Just guessing here, but if that part is required for adding strength you'd probably want to get the grain direction correct  (like it is in the photo above)

CRANKCASE BREATHER:

The crank breather is labeled in the bottom pic here and it  this is connected with a hose to an oil "trap" (top pic) and then typically routed into the airbox, but some people have reported just running it to a negative pressure location (non ram air location) with a filter at the end of the breather hose.

COOLING SYSTEM ROUTING:

Reference the pics below of the cooling system components where each port is labeled. 

(NOTE: Pics are of an RX-1.  As I understand, the APEX should be the same except it would not have C1,C2, or H2 connections.)

The matching connections are listed here:

H2 goes to C1

H1 to 10

X2 to 14

X1 to J

I to the engine block below the headers

H is cold feed from radiator

13 "T's" into that cold radiator line connecing to H (13 is a cold engine bypass route (bypassing radiator) when t-stat is closed, see hand drawn diagram below)

11 is Hot outlet off expansion tank (white tank in my pic) which goes to hot side radiator.

C2 to K

B1 to L

12 is unused, and can either be capped off or drilled out and tapped to 1/8 NPT for a coolant temp sender (note that aluminum is thin for tapping, so take caution if you choose to thread it)

OIL SYSTEM ROUTING (RX-1 and APEX):

Reference the three labeled pics of the oil system  (below).  Routing is as follows:

A goes to 1

B runs up and "tees" to both 2 and 4

C goes to 3

My throttle cable "cylinder " hole will get drilled through other half after welding (pic below).

Also the spring in pic above is obviously there to balance out the throttle return spring on the carbs / throttle bodies.  I got one at ACE hardware that was strong enough to naturally pull to about 3/4 throttle, which under some failure scenarios would leave me with some thrust in the air.

THROTTLE REVERSER:

Since the yamaha snowmobiles use a "pull" throttle, there is a need to reverse that to a "push" for aircraft use just like the 2 stroke Rotaxes.

Yet another big thanks to Steve Henry for sharing his ingenuity.  This time on his panel mount throttle reverser.

Steve also sells these at a very reasonable price.  When I counted my time, welding, and materials, I was none ahead in doing this myself, but was itching to work in the shop today and knocked this out. 

Pic with tape measurer is the one steve shared, other is my copy ready to send to the welder who will cut my throttle control hole and tig up 3 places.

And YEAH, my "rivet in pivot" is temporary!

....that's why I bought a motor from you... sight unseen!

About what might a PC job on a motor mount run?

Pm'd you

Please... oh PLEASE never let there be a time when my plane goes for a helicopter ride!

I count our freedoms in the EAB world high among those that we still have left!

You imagine it...  create it...  fly it.

And if you think about it, there's not really a lot of oversight or regulation hancuffing or confining us.

I think that is so damn awesome!!

Funny though how some people are appalled by the thought of things not being regulated or limited and are just beside themselves in angry attempts to take freedoms away from others.  Really pisses me off.

OK...  hijack and rant over.

The Yamaha oil cooler is integrated on the side of the engine next to the oil filter.  It routes engine coolant through it to do the primary cooling then oil also goes to the large remote tank where it is cooled further.

So no addnl oil cooler like the 912. 

As for my external components, I'm putting the oil tank fwd of the header where ram air comes in the cowl, my belly radiator will likely get moved under the engine with an aux fan, voltage regulator + starter relay on the engine mount, and on the firewall I plan to mount the fuel pump and coolant tank.

Behind the panel I have the ECU.

Yeah I think most 912 I've heard are more in that 160 lb area..  FWF minus radiator.

That question comes up a bit with people looking into Yamaha (which come in around 175 lbs FWF).