QuickTalk 6 - Q2 HINTS
- Category: Q-Talk Articles
- Published: Sunday, 31 October 1982 06:11
- Written by Jim Masal
- Hits: 1453
From S.W. Hanke, #2148:
1. The Q2 will fly one wing heavy depending if one or two occupants are aboard. Determine how many people you have aboard most of the time, and adjust the elevators accordingly.
2. After quite a few landings and takeoffs where the tailwheel left first and landed last, we finally wound up with a little over 1/8" upward reflex on both ailerons after many adjustments. It is supposed to have 1/8" and can be reflexed to 1/4" upward. The QAC yellow prototype has slightly more than 1/8". This is designed into the airframe to increase speed.
3. To keep from locking the rudder while landing and taxiing, be sure the clearance is sufficient (almost 1/8") between the bottom of the rudder and the fairing on the tailspring. The tailspring flexes all the way to the vertical fin.
4. Cracking occurs in the fairing under the rudder. A hack saw cut in the fairing down to the tailspring allows more flexure and reduces this cracking.
From Jim Wilker, #2294:
1. (Page 14-9) The location of the hole for QCSA3 is shown to be approximately WL 14.5 which appears to be too high by 4"-5".
From Ron Cross, #2397:
1. The plans call for routing the shoulder harness belts down from the wing and under the aft canopy bulkhead. These belts can be routed directly through the seatback bulkhead by constructing the aft canopy bulkhead so that it is in a horseshoe shape from to 3 inches wide. The full aft canopy bulkhead is mounted to the canopy, but only the first 3"-4" needs to be glassed. The inside and outside canopy tapes are made wide enough to cover the 2 to 3 inch width of the eventual bulkhead, resulting in 3 plies of BID on each side.
2. (Page 8-3) I suggest that you put the tapes on the aft side of the lower seatback bulkhead and the lower forward side of the FS94 bulkhead before the fuselage shells are joined, but don't install any other types until later. Tapes can then cross the fuselage splitline (e.g. the forward side of the lower seatback bulkhead). You will gain access to the firewall and other bulkheads when the cutouts for the canard and main wing are made.
From William Starkey, #2114:
1. I noted the 1.1" space from the bottom of the rudder to the tailspring is only part of the necessary measurement. If the pivot pin on the top of the rudder is too long because the securing nuts top and bottom on it are allowing any threads underneath to show, the rudder won't drop enough when removing to clear the pin.
From Kenneth Hall, #2681:
1. (Page 8-4) Many builders have reported difficulty in joining the fuselage shells. The following method will pull even the most misaligned shells into position for a perfectly flush joint:
a. First, cut about 30 small 1/8" masonite or plywood rectangles approximately 1-1/2" x 3/4".
b. Next, drill two 1/16" holes in each "tab" about 1/2" apart lengthwise. It is best to clamp the tabs together in pairs when drilling so the holes will match.
c. Cut about 15 pieces of .032" safety wire (same as the wire used for hot wire cutting) each 8" long, and string one wire through each pair of tabs shown.
d. Coat both shell joint lines with slurry and run a bead of dry micro along the bottom shell. Place the tab assemblies about 16" apart along the lower shell joint lines, bending the wires as shown so the tabs will balance in place.
e. Rest the top shell in place, pull on the wires, and then twist them together tightly with pliers. The clamping effect produced will draw the shells into alignment and hold them during cure. Remove any micro squeezed out.
f. When the joint has cured, cut the wires, pull them out (from the inside if necessary), and remove the tabs. There will be two .032" diameter holes at each location. Just sand the joint and fill the pin holes with dry micro prior to glassing.
NOTE: Be sure to dry fit the shells once with all the tabs in place and tightened. You may need more tabs in some areas and fewer in others. Also, use wax paper between the tabs and the shells. Don's use masking tape as it does not work well.
From Nelson Murray, #2126:
1. Attached is an isometric drawing of page 9-7 of the Q2 plans made for me by Tom Jewett. The two dimensional drawings on some of the pages are very difficult for one to interpret. Possibly some of our engineering or architect builders could make 3-D isometric drawing of the following pages: 10-9, 10-10, 14-8, 14-9, 14-10.
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