Breaking NEWS My friends

Dick Russ Sat Feb 12, 2022 6:57 pm

Several have requested a video of th eStreaker flying. Since I was unable to post a video on our Cox forum I thought I would try it on another RC group and was sucessful I don't profess to be much of a video photographer but I did my best and hope you can watch it. I let another club member fly the Streaker for the first time and he was a little nervous but at least we got a little for you to enjoy. To view the video go to : (20+) Radio Control Pattern Planes of all Eras. Click on Discussion and scroll down until you see the Streaker, the video is next to it. It's pretty fast so hang on!
Dick

balogh Sat Feb 12, 2022 7:11 pm

Nice video, Dick, one can hear it was rather windy there, right?

How do you protect the engine cowl area from the hot exhaust gases, do hou gave an exhaust deflector, or muffler, on the engine?

1/2A Nut Sat Feb 12, 2022 10:25 pm

Here is the link, you can post vids on a youtube account and play them on this site. Thumbs Up

https://www.facebook.com/100005394046013/videos/pcb.1873596956182000/622716455502553

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1/2A Nut Sat Feb 12, 2022 11:24 pm

I use the setup below for filming hands free while I fly. You can use a app to start / stop the recording
and check the camera view for proper positioning prior to recording. These rigs are cheap on ebay
most less than 100 bucks.

Dick Russ Sun Feb 13, 2022 6:34 am

balogh wrote:Nice video, Dick, one can hear it was rather windy there, right?

How do you protect the engine cowl area from the hot exhaust gases, do hou gave an exhaust deflector, or muffler, on the engine?

It has not beem a problem. When I finished the cowling installation I just brushed a bunch of CA (Super Gllue all over the inside of the cowling and then sprayed some red Paint ( Americas Best" in the inside. I used Americas Best Red which was almost a perfect match for the Carmine Red covering film I used.

balogh Mon Feb 14, 2022 6:00 pm

Dick I audio tached near 21.4k unloaded engine speed in your video. What prop size/pitch do you have on the Streaker? My unmuffled TeeDee 051 would spin a 5x4 black COX prop at that speed or maybe a tad higher.

1/2A Nut Tue Feb 15, 2022 2:20 pm

He uses a Master Airscrew 5.5 X 4.5

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balogh Tue Feb 15, 2022 2:30 pm

Thanks Brad. What prop size would you recommend for my tuned pipe on the Streaker? Holding the plane in my hands anything less than 5" seems underpropping it. I tried a 5x2 APC too on the bench with 9.6" MRP distance and this seems short, need to slip the pipe out longer from the silicone extender. The formula we use does not exactly work out, maybe because the speed of sound is less in winter colder exhaust gas..v=SQRT(kappa×Rx T) where T is gas temp in Kelvin..but 30 degree lower temperature means only 3% less speed of sound.. Huh...

Dick Russ Tue Feb 15, 2022 3:36 pm

balogh wrote:Dick I audio tached near 21.4k unloaded engine speed in your video. What prop size/pitch do you have on the Streaker? My unmuffled TeeDee 051 would spin a 5x4 black COX prop at that speed or maybe a tad higher.

That is cool. I had estimated it at 20,000 with a 5 X 3. Right now I use a 5.5 X 4.5 and feel it is easier to fly and still get 6 minutes flight on 1 ounch of 15%. I haven't gone to the balloon yet but did change the tank to a 2 ounce which provided a longer and better pick up tube. The one ounce tube was to short to flop around inside the tank. My first flight yesterday was with a near topped off tank and after 13 minutes I was ready to land. I kept wondering if it was ever going to quit running so I could land. I have decided I have decided I am more a 6 minute flyer right now

1/2A Nut Tue Feb 15, 2022 4:29 pm

APC 4.7×4.2E
https://www.apcprop.com/product/4-7x4-2e/

balogh Tue Feb 15, 2022 4:31 pm

Thank you Brad.

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