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Post by bigtone on Jan 29, 2007 5:59:31 GMT 1
I did a mod on my SC cowling. The cowling was worn to the bone so, I came up with a more aerodynamic cowl like the tubine powered full size version. I made up a template out of a old folder and cut away most of the cowl as I could. Then I cut a 2 liter bottle open and spread it out then traced the template onto the 2 liter plastic sheet. Then I fitted the cut out on both sides of the cowl until, I was happy after a little triming. I warmed up the hot glue gun and laid some lines around the cowling cut line. Soon after, I placed the plastic 2 liter cut outs over the cowling cut out hole. I sealed around the cowl covers edges and trimed them with my hobby knife a little. I made the motor vent hole in the cowling bigger to provide enough cooling. It turned out pretty cool looking with a three window veiw of the motor and wires. After replacing the motor that locked up, I installed the new one with the filters torward the top. Mounting the motor upside down, instead of the bottom where a nose over can damage them. You mite want to cheak your wires that lay on the bottom of the motor can's edge, the wires can be worn and clamped by the cowl.     The Cowl is still rough but, it's a work in progress! This mod gives the SC a shot in the arm, the SC's stock cowl is a drag. |
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Post by oldcaver on Jan 30, 2007 0:10:05 GMT 1
Looks great Bigtone. Iwas getting sick of tape repairs from cold weather cracking, so I applied one layer of ultra-fine glass cloth to the inside of a new cowl with two-part fiber resin,let it harden,and cut out the ports. Ive been flying the same cowl now for apx. 12 flights with some nose-overs and its still intact. This SC can handle the extra weight because it's on my lipo/brushless mod.
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Post by bigtone on Jan 30, 2007 5:17:19 GMT 1
I found out with this mod, nose overs are less then before on low cut grass. The main cause is the stock cowl scoupe, it hooks the ground making it nose all the way over. With my mod the SC slides on the nose but, it will not flip over. If someone just cuts off the scoupe on the bottem of the cowl, it would cut back on low cut grass/turf nose overs.
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Post by cjg on Jun 14, 2007 23:11:46 GMT 1
I strengthened my cowl using Plasti Dip spray. I simply gave the inside several coats of the white color spray. This puts a nice rubberlike backing on the plastic, and strengthens it. It didn't add any significant weight.
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sam77
Flying officer
Posts: 28
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Post by sam77 on Jun 29, 2007 17:25:06 GMT 1
Anyone use old pop bottles or something similar to make replacements?
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Post by cjg on Jul 10, 2007 1:31:45 GMT 1
I strengthened my cowl using Plasti Dip spray. I simply gave the inside several coats of the white color spray. This puts a nice rubberlike backing on the plastic, and strengthens it. It didn't add any significant weight. I had my first test today of this cowl mod. I stalled at 10 ft and it nose dived into asphalt. I heard the cowl pop all the way across the parking lot. The prop broke, but no damage to the cowl. |
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Post by flyinghigh on Jul 10, 2007 3:56:26 GMT 1
I just got my replacement cowl from hobbyzone, only got one. 3rd flight after I got it, it nosed over on grass when landing. Cracked the entire side of the cowl. On just a nose over! Any tips for homemade ones, or how to make them stronger?
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Post by cjg on Jul 26, 2007 23:25:24 GMT 1
I strengthened my cowl using Plasti Dip spray. I simply gave the inside several coats of the white color spray. This puts a nice rubberlike backing on the plastic, and strengthens it. It didn't add any significant weight. Update - had my first major crash today after this mod. It went nose first after a stall from 12 feet up into concrete. Simply put a little dent and a small crack in the cowl. Easy fix. Of course it broke the stock prop. |
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Post by spar on Aug 26, 2007 7:04:36 GMT 1
I just lined the inside of my cowling with 3M Extreme packing tape. I cut the tape into 1" wide strips and made sure each strip overlapped the neighboring strips of tape. I also applied a small piece of tape over the screw holes on the outside of the cowling to further strengthen that area. Then I cut off the lower air scoop as bigtone described.
The extra weight the tape adds should not be a problem. My last cowling was held together by that much 3M Extreme tape, only that tape was on the *outside* of the cowling holding all the pieces together.
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Post by sackohammers on Aug 28, 2007 22:32:09 GMT 1
I, too, have lined the inside of my cowl with clear packing tape. I, too, have sliced off the little scoop on the bottom of the cowling. It can tend to catch on things. I don't think the weight has made a difference.
I would probably take spar's advice and tape the outside of the cowling at the screws, but since I painted my cowling I cannot. Removing the tape would screw up the paint.
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