The first thing to establish is the wing position. These planes provide a catalyst that just naturally brings a smile to anyone that throws a toy glider into the open sky. Place a block of wood on the main portion of the fin to keep it flat on the table. I remember buying the Strato Streak for $0.25 back in the day. Start by taping a two foot length of 2 Ace bandage to the flat side of the form, leading off the trailing edge. I found it behind the white pickup truck in the tanbark along the fence. It should be slid into the slot. These all have paper covering on balsa frames, rather than sheet balsa surfaces. Put atablespoonfulor a capful of lube in aZiplocbag. It will keep its shape once it dries out. Check the camber. I will first explain how to form camber in the wings with fingers. Shyam You wont be able to get much curve near the center. The wing forms were cut to 6 lengths. This is the preferred way to wet form the wing. Dave Gee, who is on the AMA Education Committee, has produced a YouTube video showing him assembling a Sky Streak according to the AMA instructions. It surprised me by going off to the right in a large circle, getting lost in the trees. We want the high point 40% back from the leading edge on a 2 wing, so that is 0.8 or approximately 13/16. Be careful, very little camber will do it. It could be that better performance would result from rubber stripcustom cutto width. Copyright 2019 The Balsa Cabin. You will notice a change at first, but after a while you will not notice any further change. Make a right angle bend (backwards or forwards) 1/8 above the stick. CA glue is the fastest way to do it, but any glue will work, as long as you use plenty of glue and give the glue time to dry before putting a motor on the hook. The motor and propeller will take it from there. Here are two planes with the different size props. The wing is approximately 2 x 12 or 24 square inches in area, but the corners are trimmed off. Look at the plane from the front and from below. Start making the new hook by bending a full circle right handed helix with a tiny bit of straight overlapping at the end. It is important that these parts be centered. The landing gear came from the Guillows Air Plane Design Studio. It increases along a curve that goes up gradually at first, then jumps up sharply in a spike, just before the breaking point. Make a 1/4 long cut just above that line to form the bottom edge of the rudder. Notice the stall and tumble at the beginning. Make a similar set of marks on the tailplane. We want to tie the ends together without the rubber abradingitself. Wrap your fingers around the top of the wing and press your thumbs into the bottom of the wing, more toward the leading edge, and form a curve in the wing. Transfer those marks to the opposite edge of the wing. Once you have figured out the right place for the wing, you want to be able to get it back there again. Take it out every few minutes and try gently bending it to see how it is coming. This angles the left wing more into the airflow, so it gets more lift and counters the left torque roll. This weight is the same fraction of the total weight of the sheet as the wing pattern area is to the area of the whole sheet. With even more right thrust, you can make the plane dive in to the right. This one happened to be a fairly stiff piece of balsa. I did that after the wing had completely dried out. If you are teaching a class, use a plastic jar full of sand or gravel. This is how I would teach it in a class. I would prefer more depth to the curve, but thats about all that can be had with this stiff piece of wood. Our best selling motorplane. The rubber motor will be suspended between these two hooks. We are going to make a motor that is twice the distance between the hooks, which is about 7. Designed by Elegant Themes | Powered by WordPress. The AMA breaks the wings and bends the tips up to increase the tip dihedral. The bright surface should disappear from view at the same time on both wings as you rotate it. Twisting the whole wing can have the same effect. I found that bending wings around a 2 diameter jar would break the balsa. Thin electrical wire is a second choice because copper is softer and wont hold the bend as well. Now that we have got successful flights out of our Sky Streak, we want to find ways to get longer flights. Grab the tag ends tightly with a clothespin and pull hard. With these techniques, they can get much longer flights. That is why it is important to have pencil markings on the wings and fuselage slot. Push something like a hat pin into the bottom of the stick where you want the hook. After that, I wonder why I should post anything more about the Sky Streak on EndlessLift. It is hard to make precise bends in steel wire while bending over a camera tripod and working at a distance. Then you may have a roll to the right. The micrometer says this is 0.049 in diameter. Right rudder works whether the motor is turning the prop or not. A lubed motor does not develop as much torque at the same number of turns, so it produces less of a left roll. To launch, hold the plane shoulder high or over your head, with the stick and wings level. Get it flying well first. You will need two 5 long form boards, two 2 long pieces of 2 Ace bandage, some tape, two 1 1/2 tall blocks and a jar of water about 4 11/16 in diameter. If you put in too many turns, the motor will break. I will tell you about that later.) You are now ready to launch the plane. It is 3 wide. A larger propelleracceleratesa larger volume of air by a lesser amount and is more efficient. I have worked up to as many as 400 turns. Im going to give this a try. If you wind at a steady pace, you can feel the sudden increase in torque. The new hook looks like this. This motor can take up to 1,700 turns, although I rarely go over 1,600. Place the leading edges of the wing and form flat on the table top to align them. The wing must be moved all the way forward. I decided to put it back in, and a little extra. It has a lower margin for stability and adjustments can be very sensitive. I considered that to be enough. It has a 12 wingspan and is 11 long. My ultimate Sky Streak originally had a 6 prop, a 14 loop of 1/8 rubber, cambered wings, an improved motor hook and a bendable rudder. Bend the fin convex side to the left. Cut the wire 3/8 away from the bend. Great educational video of beginner Rubber Powered FF Airplane from beginning assembly to end of flight. As it slips to the left, the airflow strikes more on the left side of the fin. We are advocates of simple model aviation! Longer motors become harder to manage. I considered that to be enough. Instead, hook an index finger and little finger around the fuselage on either end of the slot and PULL the wing through the slot. Set the rudder to just overcome the excess left turn and maintain a left circle. Nothing better to help celebrate a nice day, these inexpensive flying toys will provide many hours of outdoor excitement. I usually write the maximum number of turns it is safe to put into the motor on the label. WOW! Slip an O-ring over the end and slide it down out of the way. Thank You sir The wrong amount of right rudder can have the same effect as the wrong amount of right thrust; the plane will arc to the right into the ground, or it may zoom straight up into a stall. The motor in particular is from stock rubber strip. You can do it, too. I also soaked the stick in water, hoping that the crushed wood in the holes would expand and fill them in. I trimmed a Strato Streak using this excellent tutorial, learning a lot. You want just enough to overcome the left dive. Check that everything is in the correct place before each flight. Simply grab the prop hub and the nose and bend the hanger so the prop shaft points to the right. Soak the whole wing in a cookie pan of water. The blocks at the ends insure that both tips are held flat to the support blocks that are parallel with each other and the center. Note just beyond my fingertips is one of the two form boards. The jar shown above is 4 1/8 diameter. Then I make a mark every 1/8 along the slot for an inch. For soft wood, holding it under the faucet for a couple minutes will be sufficient. (Some day you will want to deliberately twist wings. He has made videos of some of these flights. What this means is that the Sky Streak should not be expected to fly as long as relatively lighter models. The problem with this is that the right roll will remain after the motor torque goes down. I suspect it could take more. You can store your motors in plastic baggies if they are kept in a light tight box or tin. Align the steel rule along the edge of the rudder and cut with the razor blade. Save the others for other projects. Let it dry out completely before moving it. There were scratches on the box. With a little more right thrust, you will be able to make the plane climb in a right circle. The Academy of Model Aeronautics is using the Sky Streak to introduce beginners to model aviation. Then I ran hot water from the faucet over only the center 2 of the wing, blotted it dry, put the wing up on blocks and put a jar full of water (in a class, use a plastic jar full of sand) on the center of the wing. You can moisten the wood and finger form camber into the fin to pull to the left, turning the nose to the right. The plane will roll in a circular arc. I recommend that you mark the wing and tail center before assembly. Start with the wing back at the 1/2 mark on the fuselage slot. I decided to try forming the curve with my fingers. love these guillows, i played with them as a kid for number of hours, and even now as an adult i will wind and fly at the park with the kids. http://www.digitalbuddha.co. Extend themark to the edge of the wingtip. You can try a few hand launches with the wheels on until you are satisfied that everything works. The next step is to learn to cut out and assemble parts to make more complex airplanes that can fly better. The one on the plane is so close to the stick that the knots rub on the stick. With lube, I have put up to 400 turns into the kit motor without straining it. Put one end of the wing into the water. The tips were raised 1 11/16 (1 1/2 + 3/16), putting them 11/16 above the center. We need to put pencil marks on the wing to align the wing with the form. The area of the wing pattern must be (4.496/33.2) 169.775 = 22.99 square inches. There will be even more and bigger knots on the longer motor. Kids love airplanes that can take off from the ground, what we modelers call ROG Rise Off Ground. Unit 15, Heybridge House Industrial Estate, Apply glue to keep the hook from sliding out of the wood. Check yours before putting it on the plane. Work out any twist now. This can be prevented by gluing the motor hook down. You can also slide the wing a bit to the left. That will require cutting the prop shaft and making a new one. If you have many airplanes, label the motor containers so you can tell what is in them. Actually, I will be showing you quite a bit that is not included in the above references. Write the label. The inside ends of the boards are held flat to the table top with a little weight. You can also use the fin to reduce the left turn or produce a right turn. Fold the motor and put it in a storage can. Apply a drop with a toothpick. If a motor gets in dirt, wash and relube it before the next flight. One thing we can do is improve the lift and efficiency of the wing by giving it a cambered airfoil. Weight it with clothespins to keep it from floating up. That completes the assembly. Draw a thin line of glue across the hinge line at those marked places with a sharp pointed stick. We can also make a rudder with flexible wire hinges. (If you prefer, you can carve a form of your own. This can be especially bad with an unlubed motor. I have two profile scale airplanes, an F4U and Japanese Jill using the bto fly that use the basic Skystreak with added material to assume the scale outlines. The Guillows Sky Streak is a simple, sheet balsa, rubber powered, free flight, stick, toy airplane. I found that it worked without the glycerin, but like all liquid soaps, it dried out quickly. This prop size is too small for the wing area. If you are looking to win competitions or break records, you will need a good supply of extra motors and good lube, because you will be winding close to the breaking point and motors will not last long. Place the wire in the glue and position it carefully. It is a bit of the logic behind the Squirrel wing. Contest quality rubber is not as tough as the kit motors, but it can take more turns and store more energy. This causes the plane to turn even more to the left. You can also use a sewing pin, after cutting the head off. You also want to keep your motors clean. This toy airplane has a one piece wing with a built-in dihedral. I love your number 6. If the plane is going straight forward under excess power, it will nose up and the wing will lose lift. Most people think that the wing is up-side-down but it actually works well with the covering on the bottom for this reason. 2 of the Sky Streak Motorplane in one box. Recent kits come with a very heavy hook. Start by putting a mark 5 in from each wingtip. Mark the position of the high point of the camber near each end. Go together in minutes but provide many hours of back yard entertainment. Not only will the cambered airfoil have a higher lift coefficient slope, the trailing edge will slant up, increasing the attack angle of the wing, also increasing the lift. Soak it to remove the paper, or cut the plastic off with a razor blade. During the flight tests I noticed a clicking sound. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Please send contributions to (darcy@inventorArtist.com) and feel free to leave comments!
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