Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Airframe

WOOD STRUCTURES

QuestionAnswer
Which species of wood is considered to be the standard when comparing other woods for use in aircraft structure? Sitka spruce.
What is the basic difference between plywood and laminated wood? The grain in each layer of laminated wood runs in the same direction. The grain in the layers of plywood runs at 90 degrees or 45 degrees to each other.
What kind of glue is recommended for making a repair to a wooden aircraft structure? Synthetic resin glue.
How is aircraft plywood prepared for making a compound bend? The wood is soaked in hot water until it is pliable.
How is pressure applied to the glued joint when splicing a wooden aircraft wing spar? With cabinetmakers parallel clamps.
How much pressure must be applied to a glue joint in a piece of softwood to produce a strong joint? 125 to 150 pounds per square inch.
What is the correct repair to a wooden aircraft wing spar if the wing-attach bolt holes in the spar are elongated? Splice in a new section of the spar and drill new holes.
What kind of repair is recommended for a hole in the plywood skin of an aircraft wing? A scarf patch.
What is the recommended taper for a splayed patch in a plywood aircraft skin? 5 to 1.
What is the recommended taper for a scarf patch in a plywood aircraft skin? 12 to 1.
Why should sandpaper never be used when preparing a scarf joint in a wing spar for splicing? The dust caused by sanding will plug the pores of the wood so the glue cannot get in to form a good bond.
What is the largest hole in a plywood wing skin that can be repaired with a fabric patch? One inch in diameter.
Why are light steel bushings often used in bolt holes in a wooden wing spar? The bushing keeps the spar from being crushed when the nut on the attachment bolt is tightened.
How long should a glue joint be kept under pressure when splicing a wooden aircraft wing spar? For at least seven hours.
Are mineral streaks in a piece of structural aircraft wood reason for rejecting the wood? No, if there is no evidence of decay in the wood.
Which area of a wooden aircraft wing spar must not contain any splice? There must be no splice under wing-attach fittings, landing gear fittings, engine mount fittings, or lift and interplane strut fittings.
How is compression wood identified? It has a high specific gravity, it appears to have an excessive growth of summer wood, and little contrast between the spring wood and the summer wood.
What is done to a splice in a wooden aircraft wing spar to strengthen the splice? Reinforcing plates are glued to both sides of the splice.
Why must abrupt changes in the cross-sectional area of a wooden structural member be avoided? Abrupt changes in the cross-sectional area of a structural member concentrate stresses and can cause failure.
Created by: Aima2019