Q. Installing leading edge skins on the wingsA. The leading edge skins are first cleco'd in the top hole on the
leading edge rib with the skin hanging down over the table. You pull the skin down and
drill the next hole and cleco. You continue doing this until one side is finished. You
then remove all the clecos and turn the wing over and repeat the process on the opposite
side. Once finished you can remove the clecos and starting at the top of the rib work your
way down to the bottom clecoing as you go.Back to TopQ. How to deal with proseal?A. We have found that if you keep your work area
clean and uncluttered while working with Proseal eliminates 90% of the common complaints.
Small throw away brushes with the bristles cut back to 3/8" work well for applying
the sealant. One brush will do about 40" of rivet line before it becomes unusable.
Clean excess sealant from visible surfaces before it sets.Back to TopQ. Where should I install my air speed indicator static sourceA. A perfect spot to get the ambient pressure for the ASI has proved
to be the forward cabin side skin (just ahead of the door) on both sides of the
aircraft.Back to TopQ. What are some common bolt torque values?A. Quite a few of our builders have been over
tightening their bolts. The common bolts are AN3, AN4, AN5 and AN6. The
following are torque values in INCH POUNDS using standard fiber nuts. AN3 20-25 AN4 50-70 AN5 100-140 AN6 160-190Back to TopQ. How should I deal with areas of the skins were the called out rivet
seems to be to short?A. In our aircraft kits we try to call out the rivet lengths in all the areas
of the aircraft. Sometimes, due to varying thickness of material and use of
chromate or proseal the rivet length used in the adjacent area may be too short. This is common in the wing
area where there are many thickness of material in the spar. If you feel that a certain
rivet is too short to be pulled go to the next size rivet. Back to TopQ. What is the best way to run the trim tab electrical cables
through the elevator.Q. What is the best way to run the trim tab electrical cables through
the elevator.
A. The best way is to run the wires straight up from the trim tab, through a 3/8"
hole drilled in the web of the elevator spar and back along the leading edge side of the
spar to the center of the elevator and exit out at the center. Also, leave a fair amount
of excess cable where the cable exits the elevator or use a quick connect in order to
facilitate easier removal and installation of the elevator.
Q. When the floats are installed, the gross weight of the aircraft
increases to 1730 lb., is this correct?
A. Yes, we have made provisions in our design to accept the increase in
gross weight. One should note that with floats installed, a natural decrease in
performance of the overall airframe/engine combination should be expected.
Back to TopQ. Where is the best location for the brake reservoir?
A. At the top of the firewall, engine side of the firewall.
Back to TopQ. Where is the best location to ground the battery to?
A. The best location would be to ground the battery to the nearest
bulkhead.
Back to TopQ. Can I add lubrication to the delrin bearing?
A. No, the Delrin is a self lubricating type material. Any lubrication
such as WD-40 can dry out the delrin.
Back to TopQ. I am fighting cooling problems with the engine, what can be done?
A. Increase the cowl exit area. A typical rule of thumb is exit are is
1.5 times the inlet area. If cooling still is difficult sometimes the addition
of a lip (flange) about 1 1/2" down on the back of the lower side of the
cowling can help create a low pressure area which will improve the scavenging
of the hot air out of the cowling. This will draw more air through the engine compartment. Also,
the baffle should be place tight against the rear cylinder, this will force the air to
travel through the cylinders. Also, you may wish to check the size of your oil
fittings on your cooler. Some of the earlier kits were fitted with
3/8" fittings and adapters, these could be increased in size to 1/2"
Back to TopQ. Can an amateur cover the aircraft?A. Many builders tend to worry when it comes to covering with fabric. This is an
extremely simple process. If you follow the instructions carefully you will end up with a
professionally looking covering job. The modern materials available today are designed for
ease of use and long life. The most important part of covering is for the builder to have
patience, the work, although not complicate, is repetitive.Q. Can I add lubrication to the delrin bearing?
A. There is no section in the manual in
regard to fabric covering of the wing. the fabric covering
method is described in the aileron section. With the wing, Poly-Fiber recommends that the owner use 1 1/2 inch rivet spacing
for fabric rivets, if the 3M weather-strip tape (polybond) is
not being used. If an owner is using the 3M tape, then a 3 in
spacing or less could be used. Also, acid etch prime the
metal surface for better adhesion of the polytack.
