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RE: Howard Engineering - Qwik Fli III – Build - 12/15/2004 1:55:07 PM   
8178



Posts: 3031
Joined: 5/25/2004
From: _ , USA
Status: offline 		The fixed gear version of the kit uses a very clever plywood wing tongue for the front of the wing but because I’m using retracts I had to use dowels. The next step was drilling the front of the wing for the wing dowels. I carefully positioned the wing on the fuselage and by using pencil lines of the fuselage former holes I transferred the dowel positions to the front of the wing. The back wing bolt was a little more tricky because the thread hole was already on the former. I threaded a wing bolt into the mount from the inside facing out so it would just contact the wing. I put a piece on masking tape on the area of the contact spot on the wing. I then carefully aligned the wing on the fuse and pressed down on the back of the wing so the wing bolt would make a mark on the tape. I drilled through the wing on the tape mark for the wing hold down bolt. Next was making the back wing fairing. On the originals I used Micro-balloons mixed with epoxy but this time I decided to use balsa.


To be continued..

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< Message edited by 8178 -- 12/16/2004 3:17:17 AM >

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       Post #: 26

RE: Howard Engineering - Qwik Fli III – Build - 12/15/2004 1:56:34 PM   
8178



Posts: 3031
Joined: 5/25/2004
From: _ , USA
Status: offline 		More images of the wing. Not all of the sanding is complete yet.

To be continued..

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       Post #: 27

RE: Howard Engineering - Qwik Fli III – Build - 12/15/2004 2:02:11 PM   
8178



Posts: 3031
Joined: 5/25/2004
From: _ , USA
Status: offline 		I used scrap from the wing tip blocks for the front of the wing and a small amount of Micro-balloons and epoxy. View of the back part of the wing before the Micro-balloons and epoxy filets and final sanding. The edge of the balsa on the front and back of the wing is capped 1/32” plywood to give it a hard edge.

To be continued..

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< Message edited by 8178 -- 12/16/2004 12:09:14 AM >

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       Post #: 28

RE: Howard Engineering - Qwik Fli III – Build - 12/15/2004 2:16:27 PM   
8178



Posts: 3031
Joined: 5/25/2004
From: _ , USA
Status: offline 		I taped off the area under the canopy and painted it black. I located the canopy on the fuselage and made a fillet around the lower edge of the canopy and the fuselage with fine glass cloth and epoxy. After the epoxy set it was sanded smooth and then a thin layer of Micro-balloons and epoxy were added. The Micro-balloons and epoxy were sanded to give a smooth transition between the fuselage and the canopy. There is a 1/16” breather hole in the fuselage under the very back of the canopy.

To be continued..

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RE: Howard Engineering - Qwik Fli III – Build - 12/15/2004 3:10:48 PM   
8178



Posts: 3031
Joined: 5/25/2004
From: _ , USA
Status: offline
quote:

ORIGINAL: hankpajari

I always thought that the Kwik Fli was the best looking model ever made. It just looks like a model airplane should look like.



Me too!

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       Post #: 30

RE: Howard Engineering - Qwik Fli III – Build - 12/15/2004 3:36:36 PM   
8178



Posts: 3031
Joined: 5/25/2004
From: _ , USA
Status: offline 		As I mentioned earlier the original had a Webra 61 Black Head and this kit was also setup for the Webra. My son has all my old Webras and I could use them but I decided it wouldn’t hurt to have more power. I decided that I would use one of my Irvine 61 ABC engines. It is a little longer than the Webra but with a little work on the Hays mount I was able to move it back 1/8” to make up for the difference in length. Most SPA guys are using four strokes and on a new kit the firewall could be positioned further back to gain the needed space. The kit uses a neat mounting system for the motor mount and fuel tank. The front of the tank mount holds the blind nuts for the engine mount bolts. I had to modify the system slightly to make room for the nose gear retract unit air cylinder. I like to mount my engines to the right side but the engine can be mounted upright or any position in between. I haven’t cut out the fuselage for the Irvine carb yet.

To be continued..

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RE: Howard Engineering - Qwik Fli III – Build - 12/15/2004 3:39:28 PM   
8178



Posts: 3031
Joined: 5/25/2004
From: _ , USA
Status: offline 		Images of the fuel tank with new fuel lines.

To be continued..

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RE: Howard Engineering - Qwik Fli III – Build - 12/15/2004 3:44:55 PM   
8178



Posts: 3031
Joined: 5/25/2004
From: _ , USA
Status: offline 		Image of the Irvine engine installed. Just for nostalgia I’m using the Du-Bro muffler like I had on the original. Extra baffles of course!

To be continued..

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< Message edited by 8178 -- 12/15/2004 5:47:57 PM >

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       Post #: 33

RE: Howard Engineering - Qwik Fli III – Build - 12/15/2004 5:48:47 PM   
8178



Posts: 3031
Joined: 5/25/2004
From: _ , USA
Status: offline 		The horizontal and vertical stab is cut from 3/8” light balsa and needs to be sanded to an airfoil shape. I marked off two lines on the front edges that were 1/8” apart from the center line. I then started the airfoil shape from about 1.5” back from the leading edge and then rounded off the very front.

To be continued..

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< Message edited by 8178 -- 12/16/2004 12:12:47 AM >

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       Post #: 34

RE: Howard Engineering - Qwik Fli III – Build - 12/15/2004 5:56:46 PM   
8178



Posts: 3031
Joined: 5/25/2004
From: _ , USA
Status: offline 		The vertical stab is made from four pieces of 3/8" light balsa. Two pieces are butt joined together for the main vertical part, then one piece for the front part on the fuselage and then a small piece at the angle change on the lower front part of the stab. I glued the pieces together on my bench top to keep them straight.

To be continued..

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< Message edited by 8178 -- 12/15/2004 5:59:40 PM >

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       Post #: 35

RE: Howard Engineering - Qwik Fli III – Build - 12/15/2004 6:19:58 PM   
8178



Posts: 3031
Joined: 5/25/2004
From: _ , USA
Status: offline 		Next the horizontal stab was test fitted on the fuselage. A scrap piece of 3/8” balsa was inserted in the stab key and down into the back of the fuselage to hold the back of the stab in alignment. Careful measurements were made from the front center of the fuselage to the back outside stab on each side to make sure the stab was square with the fuselage center line. The stab was cross checked with the wing by measuring between each stab tip and each wing tip. When everything checked out a pencil mark was made from the front part of the stab and onto the top of the fuselage for an alignment key. The stab was also checked to make sure it was in full contact with the top of the fuselage and was parallel with the wing. The stab was removed and the top of the fuselage was coated with epoxy. The stab was re-installed and taped in the front to hold the alignment. All the alignments were rechecked to make sure nothing changed while the epoxy setup. These alignment checks of the stab and fuselage and wing are critical to making a great flying aircraft.

To be continued..

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< Message edited by 8178 -- 12/16/2004 12:15:37 AM >

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       Post #: 36

RE: Howard Engineering - Qwik Fli III – Build - 12/15/2004 6:40:26 PM   
8178



Posts: 3031
Joined: 5/25/2004
From: _ , USA
Status: offline 		The final sanding was completed on the vertical stab assembly. Using a 3’ straight edge a pencil line was projected from each side of the horizontal stab key out to behind the canopy and aligned with the center line of the fuselage. These lines are used to make sure that the vertical stab will be square with horizontal stab and the fuselage center line. The vertical stab was test fitted to make sure that it was in full contact with the horizontal stab and the top of the fuselage. The bottom of the vertical stab was coated with epoxy and some spread along between the pencil lines on the horizontal stab. The vertical stab was installed and aligned with the pencil lines and taped down to the top of the fuselage. A square was used on the top of the horizontal stab to check that the vertical stab was positioned squarely with the horizontal stab. A piece of tape was used to hold the stab in alignment while the epoxy setup.

To be continued..

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< Message edited by 8178 -- 12/16/2004 12:17:15 AM >

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