Re: COX Flight Contest: What's Your Entry?

WingingIt74 Wed Jun 05, 2013 8:39 am

GUS THE I.A. wrote:Ooooo, one of those funny airfoils! Cool. How much does it weigh? Is the break, or step, in the airfoil critical, to make it work well? Mine would be purple! Just saying...

Yes it's called a KFm-4 airfoil, the step makes the airfoil. I'm not sure on weight, I'll have to ask Jeremy. The last one he built like this was electric and it screamed...

https://www.youtube.com/watch?v=b3aIhppXuH4&feature=share&list=UU6H3uxVW4UZ4DUYvk_IRKKw

batjac Thu Jun 06, 2013 3:38 am

Here's mine. A Cox Katydid that's been cut down from a cabin high wing tricycle to a taildragger motor glider. Originally had a Norvel BigMig on it, but that's been replaced by a TD.049 with a throttle sleeve from Matt and a spring starter from Bernie. The TD is bolted to the BigMig tank mount, but is being fed from a one ounce tank in the fuse. The tank mount tends to foam up quite a bit. I'll probably replace the tank mount with a ply beam mount eventually.

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The Disputed Mark

**RknRusty** Thu Jun 06, 2013 8:08 am

WingingIt74 wrote:Yes it's called a KFm-4 airfoil, the step makes the airfoil. I'm not sure on weight, I'll have to ask Jeremy. The last one he built like this was electric and it screamed...

Very nice, Travis. That should be a fun plane for the contest. Very good video. I noticed I hadn't subscribed to your channel, so I clicked on it this morning.

Batjak, you'll be a tough competitor with that big ol' Norvel tank.

WingingIt74 Fri Jun 14, 2013 7:37 am

WingingIt74 wrote:Here is mine. PinchFlat built it specially for this contest. Although it has a Babe Bee... It looks to be begging for a TD.

Here is one of the engines we will try on it tonight, I also have a 5cc Babe Bee to try also. I may even try a TD, but I've never ran one yet. Smile

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**RknRusty** Fri Jun 14, 2013 11:31 am

WingingIt74 wrote:...I may even try a TD, but I've never ran one yet.

Seriously, you've never run a Tee Dee? If so, you're in for a treat. I never miss an opportunity to say, Once you go Tee Dee, you'll never go back.

WingingIt74 Fri Jun 14, 2013 11:52 am

No I haven't, but i have a few of them Smile

**RknRusty** Fri Jun 14, 2013 12:01 pm

WingingIt74 wrote:No I haven't, but i have a few of them

The first time I cranked mine on a test stand I had trouble because I was flooding it, and I had never flip started either. A spring helped, but they eat those pretty regularly, and now that I'm familiar with it, there is absolutely no need for a spring. They start much more easily than a reedy, especially a tanked Bee. And there is nothing about them that makes them finicky. It always acts the same every time you go fly. I usually test run my Bees before I go, because you never know how it might act.

JPvelo Fri Jun 14, 2013 3:07 pm

RknRusty wrote:A spring helped, but they eat those pretty regularly, and now that I'm familiar with it, there is absolutely no need for a spring.act.

I secure the springs on mine with a small zip tie routed in front of the pressure tap and behind the Venturi.

Jim

**RknRusty** Fri Jun 14, 2013 7:04 pm

That's what I do with the Norvel springs to the beam. My last TD with a spring is on the Satan, so I'll do that.

WingingIt74 Fri Jun 14, 2013 9:24 pm

Did the maiden tonight...

duke.johnson Fri Jun 14, 2013 9:42 pm

Shoot man that's to bad.

Pinchflat Fri Jun 14, 2013 9:43 pm

I think it will fly again. It is amazing what a bit of glue and skewers can do.

JPvelo Fri Jun 14, 2013 9:59 pm

I feel your pain brother.

Jim

**Cribbs74** Fri Jun 14, 2013 11:17 pm

Sorry Travis, that does stink. It should Epoxy back together just fine though.

I noticed that in every flight the engine was running really rich. Were you just testing things out or was the engine not co-operating?

Tough luck man.

Ron

**RknRusty** Fri Jun 14, 2013 11:36 pm

Aw that's too bad. That's modeling... and re-modeling. I'm currently riding a streak of good luck that's beginning to worry me.

GUS THE I.A. Mon Jun 17, 2013 12:33 am

Wow, bummer! That does not look like the best place to be flying, anyway. Do you see the houses over there? If that is all of your property, then I retract my statement about the area. It just looks too tight, and residential to me.

duke.johnson Mon Jul 08, 2013 11:36 pm

Here's my son Daniel's entry for the Castor Oil contest. Cox .051 TD on a foam wing Halflite. And just for Rusty, running on a bladder.

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