Usher Enterprises Inc.

F-106


2005 September: Fuselage vents added for scale.
2002
Sept. Fiberglass tube replaces balsa tube for raceway for air lines to nose.
June If you want the service hatch to look nice, finish this inside part before you cut or glue.

June Conduit location on leading edge moved back to half way between spars.
Inside location stay the same.


2002
Jan.NOTE if you use scale struts.
Make sure no part of the strute is higher than the top of the wing as it will hit the fuel tank.

2001
2001 HEY! Where's the builder help?
I just found a little error on spar #3, when I asked a builder if he saw this, he said "I just fixed it with a Dremel". Please send me your problems.
Feb. New main retracts

Year 2000

Feb. added wing conduit to kit.
Feb. added butt wood wood to kit.
Mar. added fuel tank wood to kit.
Mar. added radio tray to nose.
Mar. details for scale nose door on plans.
Apr. added Nose pitot holder to kit.
Apr. added one inch to bypass for auto start turbines.
May. added Fin pitot for turbine speed control.
June added new style fuel hose holders to kit.
June altered fuel tank spacer.
Oct. New conduit run.

NOTE NOTE!! Make sure you fill in the space around the elevon CF tube and the spar. Use balsa and epoxy. The plywood squares are just to align the tube.

NOTE! Locate the turbine in the bypass so there is 1/2" around the rear for cooling air.
Locate the inner tube 2" to 3" behind the exhaust outlet. At the rear have the two tubes 1/4" inside the nozzel.
The nozzel will provide the cooling.

Turbine power
Use the nose pitot for the fuel tank vent. It slops down some so if you vent fuel on the ground it will not run back to the fuselage. I used a 1/8" brass tube inside a plastic 1/4" tube. I soldered a 5/32" short brass tube on the rear for a better hose fit and glued a 5/32" alum tube on the front for the silver look.
The pitot slides in a grommet and should be pushed in on the ground to prevent damage.
Ducted Fan Power CG

I needed to move the retract servo and brake servo behind the wheels in the belly pan. The receiver and battery were moved to the front of the rear fuselage section. This fixed a out of balance problem. Nothing was in the nose section.
This put the C.G. 1/2" aft of the spar. I am now moving it foward to 1/4" aft of the spar. There is not enought power in the DF to be nose heavy. The drag of the up elevons are too much to overcome.
Elevon location at varying C.G.

With the C.G. 1/2" aft of the spar it was too sensitive in pitch. The elevons were set 1/4" down at the tip for neutral. As you move the C.G. foward the elevon will move up 3/16" (down just 1/16") when the C.G. is at the spar. Elevon travel of 1/4" up and down is more than enought. Aileron is 1/8" up at the tip and 1/16" down if your radio will do this. These controls add. This means if you hold full up and add aileron the up elevon will move 1/8" up more to 3/8" total. You may want to do duel rate on rudder (nose wheel), control with switch or throttle position.

When you test fly have a helper that will trim the controls on your command.

NEW NEW

October 12-00 New routing of conduit for air lines! The leading edge is large enought to hold the conduit. Cut a hole 1" behind the first spar out to the L.E. Follow the spar line with the hole. And center it.Use a brass tube as a drill.You can enlarge the hole with sandpaper on a dowel. When you are ready to glue the L.E. on cut two holes. One at the landing gear and one to line up with the hole you drilled in the foam. Put a small cord inside the conduit then put the conduit in the leading edge. At the retract location glue the conduit to the leading edge. Have it stick out about 1/4". Have plenty at the front end so you can push it into the center of the wing as you install the glass leading edge. You use the cord to pull the air lines in when you are ready. This instalation is nicer as you need not fill the wing.
I will show you how to preform the conduit at the retract end.


Pictures from Marty Snell while building the 106 nose door.

Note the three hinges and the fact the two end hinges are out farther.
This keeps the hinge line stright and keeps the door from binding as it opens 180 degrees.
Nose is to the left.



Door is open 90 degrees at this time.
See how the operating arm will go below the fuselage because of the bend at the end.
Nose is to the right.






Door is now open 180 degrees.
See how the operating arm and the door link line up.
Thanks Marty!







UEI test F-106.
Nose is to the right.
Prototype nose door on test aircraft. Upper yelow arrow is air cylinder and lower one is transfer arm. Door has started to open.







Door is now 90 degrees open. Red arrow points to link from door to transfer arm.














Bottom view door is open 180 degrees.


A door kit is now in stock.



If you have any questions contact me by e-mail.
E-MAIL Darryl