Mix RatioâThe proper mixing ratio for Safe-TPox is different than
for the previous RAE style. The proper ratio is onl each bottle
and was previously called Out in Quickie Newsletter 6 Nevertheless,
we continue to receive phone calls frsuri builders who are confused.
Please incorporate all changes in the back issues of the newslet
ters into your plans prior to beginning construction. This will
eliminate errors and confusion.
Engine Storage Remove the spark plugs and pour in about 2 tablespoons
of engine oil. Next, turn the engine over by hand about 5 revo
lutions to coat the cylinders with oil. Finally, turn the crankshaft
until the keyway is horizontal in order to place both pistons at
top dead center.
|| Engine VibrationâThere
are still a few Quickie builders who have been unable to solve
an abnormally high vibration level in their aircraft. First, refer
to Newsletter 7 and check everything mentioned there. Other suggestions
include the following: when you have changed from short spacers
to longer ones, the rubbers may have taken a ââsetââ and need to
be replaced. Optimum spacer length will he when the rubbers are
tight but not deformed; i.e. the rubber should not deform and bulge
around the corners of the machined aluminum double cone. Also,
be sure to use a washer behind the rubber on the
||pilot side of
the firewall that is no larger than the diameter of the rubber.
the engine is running hot, both the CHT and & Oil Temperature gauges
will read high. If the CHT reads high on climbout but the oil temperature
is near normal, then the CHT gauge is probably reading incorrectly.
Contact QAC if you have any problems in this area.
|| Fuel ContaminationâThe
builder must keep a close watch on the fuel filter for any signs
of contamination (trash). Install a second filter near the carburetor,
using a paper element such as a Fram 6-3 or equivalent. As indicated
in a previous newsletter, coat any exposed foam that sees fuel with
epoxy, even if it means opening up the fuel tank.
||Weight and Balance
Use only good scales, aircraft or platform type, to perform your
final weight and balance. One Quickie owner found that his Quickie âgainedâ 25
pounds after he reweighed the aircraft on platform scales instead
of his bathroom scales. Once again, bathroom scales are not acceptable.
Readings Some builders have reported erratic tach readings. The Westach
units are not the most reliable tachs, but they are the only ones
that we have found that will work with the Onan. Be sure to send
in your warranty card to Westach. (You know, the card that fell
out of the box and got lost when you took the tach out to install
||Static RPM ReadingsâWith
the standard 18 h.p. engine, the static rpm should be 2900-3000 rpm.
With the high compression cylinder heads, either 21 h.p. or 22 h.p.,
the static rpm should be about 3100 rpm. About one builder in three
needs to have us modify the propeller after installing the high performance
mods because of low static rpm. Our turnaround time for this is about
5 days. In order to check your tach accuracy, QAC suggesls a Heathkit
Thumb Tach. which costs about $35.00 and can be assembled in one
evening. If Gene can do it in four hours, anyone can!) This tach
uses sunlight being interrupted by the revolving propeller and is
calibrated with a fluorescent light which will cause the tach to
read 3600 rpm.
sure to install the studs into the engine block tightly. Use two
nuts jammed together and Locktite Brand Locknut (Blue Package) on
the threads going into the engine. Do not use it on the fine threads.
Be very careful to torque the nuts as shown on the installation sheet.
Also, you must use the gasket sealant called out. Finally, install
the âpalâ nuts after running the engine several times to ââheat cycleâ the
gaskets and then re torquing the head nuts. Several builders have
attempted to mill their heads on their own with mixed results, Please
consult us before changing anything on the engine. Remember that
we have hundreds of hours of experience
||in flying, test
stand, and dyno work with the Onan. Many of the different ideas that
we have tried have not worked; others have been successful. The high
compression mod was originally furnished to us by Onanâs engineering staff. Our testing indicated that there were long term problems with head gaskets when used as furnished by Onan. It took us over one year and 150 hours of testing to find the right combination for our application.
||Fuel OctaneâWith either the
21 h.p. or the 22 h.p. engines, one must use 100/130 Avgas, 100 LL, or Premium Auto fuel. Also, we suggest using Alcor TCP additive to help remove lead deposits in the combustion chamber. TCP is available from Aircraft Spruce; a one quart kit will treat 155 gallons of 100/ 130 or 600 gallons of 100 LL and costs about $10.00 with the dispenser, making it very cheap engine insurance.
||Regulator/Stator Matchupâ Some builders have noted that the regulator and stator plugs have different fittings, with one being L-shaped and the other being straight. To match the wires together, take the stator plug and remove the terminals from the plug with a small screwdriver by depressing the clips. Next, attach the wires individually onto the regulator using individual connectors.
||Referral Commissions -
Because of the current dealership network, we have discontinued the
referral commission program.