Sounded great John. Reminds me of my diversion from my KR2S to put a turbo diesel in a caravan. Very similar events. I'm almost ready for the third and hopefully final time of dropping the engine / trans into the Virginia body. http://www.vwdiesel.net/phpBB/viewtopic.php?t=15633
Soon I'll be back to KR land of building :-D -dave John Gotschall wrote: > Last week was the first 2180 type 1 turbo run. > > This week was the second. For those of you who have not had your first > engine run yet I'll share my experience. > > Last week: > > Pull the top set of spark plugs, crack open one of the fittings feeding > oil to the turbo charger and crank the engine over checking for oil > pressure. crank. crank. crank. crank. No oil pressure. Lift the > tailwheel and make the top longerons level. crank. crank. crank. No oil > pressure. > > Remove the oil return line from the turbo to the intake on the oil pump, > squirt oil into the pump to prime it. Reinstall the return line. > crank.crank.crank. No oil pressure. > > Remove the turbo oil return line from the turbo housing and reorient it > so it stands almost straight up, still connected at the oil pump end. > Pour oil into the open line until there is (in the vertical tube) almost > two feet of vertical oil going into the inlet on the oil pump. Observe > the slightly cracked open oil line going to the turbo, looking for > pressure there. crank, crank, crank,crank. No oil pressure. What's > that on the floor? A huge puddle of oil from the opening on the bottom > of the turbo housing where the line that is now vertical used to be. I > guess that means it's pushing oil now. Clean up the oil from the floor. > check the oil level (again), add some. > > Reinstall the turbo oil return line. crank crank crank, got pressure > now. Reinstall the spark plugs. > > Remove the alligator clip wire that was grounding the p-lead terminal of > the mag, and install the lead from the mag switch, tighten the nut. > > Everything ready! ok! Put gas in the tank, bleed the air out of the > fuel lines. What's that smell? > > The bottom of the fuel tank is wet with fuel. No time to to fix it now, > pull the tank out, replace it with a 1 gallon gas can rigged with a > valve and fitting. > > Pull the airplane trailer into the street, get help to unload the plane. > Unload the plane and tie the tail wheel to the basketball hoop post at > the end of the culdesac. > > Crack the fitting for the gas line at the fuel primer nozzle on the > intake manifold, pump the primer until some gas comes out. ok. > > Retighten the fitting, one last check that everything looks good, and > hop in the plane, pump the primer. hmm the primer seems to only have > pressure at the last 1/4 of it's inward stroke. Does not matter, it'll > do (lots of guys don't even have a primer). Master on, EIS on, Ignition > on, "Clear Prop", mixture full rich, throttle at 1/4, crank, crank, > crank, crank, crank, crank, crank.crank. Hmm.. no fire. But I can > smell fuel. > > This airplane has a key switch that goes (clockwise) Off, (Ign+Mag), Mag > only, Start w/mag. It starts only with the mag, then I can add the > second ignition system by turning the key one position towards off. > > > I decide I must investigate. I reach for the key and turn it towards > off, one click to the (Ign+Mag) position, then one more to the "off" > position: > > *** BLAMO *** A BALL OF FIRE comes out of the exhaust! Woah! I knew > right away that turning off the energized ignition system caused it to > fire at least one spark plug, if not all 4 of them. > > The prop turned a half turn. > > Hmm.. the mag is not working I surmised. > > I disassembled the mag p lead wiring from the key switch and started > ohming out the wires looking for the trouble: must be grounded > somewhere. Nothing wrong at the switch, disconnecting the EIS tach lead > had no effect. Finally, a close investigation of the mag itself showed > that the ring terminal had grounded itself to the case of the mag. Bend > the terminal away from the mag case, reassemble all the wiring that was > disassembled for troubleshooting. > > It should fire now. > > Hop in the plane, "clear prop" and crank, crank, vrooooOOOMMM! > > Check the tach connected to the ignition system, reads near zero (that > does not work), flip through the EIS pages for oil pressure, 47 lbs > (good!), eis tach works! Batt voltage reported by the eis indicates no > charge from the alternator. > > OK, got engine run, runs on ign and mag either or both ok, oil pressure > ok, full power run up won't develop turbo boost. Max manifold pressure > is 28" mercury. max rpm about 2700. NOT what I was hoping for, idle > adjustment is WAY off, but runs smooth. The used turbocharger throws > black oily chunks onto the top of the wing (dirty mess). > > Enough for one day, back to work for a week... weeks over time to try > again! > > Drain aluminum fuel tank, run a vaccuum cleaner blower forcing air into > the tank to dry it out, 4 hours later still has fuel in it. Give up on > getting tank dry. Instead turn the tank upside down, fill opening down. > Fill three kitchen size garbage bags with helium/argon gas mix from mig > welder, pinch the bag closed, put the pinched closed end of the bag in > the fuel fill opening and fill the tank with helium from underneath. 3 > bags of helium in the tank, go ahead and weld the pinhole with fuel > dripping and vapor in the tank, the helium stops combustion. Didja see > that smoke come out of the tank? reinstall tank. > > Fix oil leak at top of engine, replace bolts that fell off the exhaust > J-tube on the left side last run (big exhaust leak), Install heat wrap > on exhaust near oil filter. > > flip all the switches inside the automotive tachometer relative to the > cylinder count, any setting is better than last time, and the > instructions are missing so just flip 'em. Perform the calibration > procedure for the manifold pressure sensor for the EIS. Very happy that > there is a good ol's steam guage also for that. > > Rig that 12volt winch from the garage sale 4 years ago to try that out > for letting the plane down the ramp out of the trailer. > > Unload plane and tie it to the basketball pole again. > > "clear prop" Vroom!! (Did I hear someone yell stop??) pull lean > mixture until stopped. > > Did you say something? "Yeah the strap came off the pole, you were > about to leave, do the brakes work?" > > "Put 4 half hitches in it, that'll hold it" "What's a half-hitch?" > > "Nevermind, I'll do it. See? like this.." > > "clear prop" Varoom! Mag only, both, ign only, oil pressure, temps > cold, warm it up... Idle screw is still wrong. All warmed up? ok, > lets' see what wev'e got for power this time.. manifold pressure rises, > back pff the throttle at 31 inches mercury, 3000 rpm static.. now that's > what I was looking for. Hear that turbine spool up? yeah baby. > > ok, engine's ready. Now to build a canopy, foredeck and cowl. Oh, and > clean up this mess. > > > Sorry for the long posting.] > > > jg > > > > > > > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html >
