Author Topic: HYPER VIPER (Read 6006 times)

Greg Rodney · « **on:** January 06, 2019, 08:56:30 PM »

After what seems to be forever

The final product ready for production. It's my balsa version of the COX Hyper Viper.
Weighs just 195 grams (6.88oz)...with motor, tank, and wheels... without covering.

Kit comes with instructions for a rather simple jig for building the wing
Wingspan is 27"
Length is 20-1/2"

Kit is $69.00 +S&H
Contact me at southridgecnc@gmail.com
Or call me 814-566-6562
Thanks for looking.
Greg

Greg Rodney · « **Reply #1 on:** January 06, 2019, 09:03:09 PM »

A few more pix from the build

Daryll White · « **Reply #2 on:** January 06, 2019, 11:59:59 PM »

Nicely done sir!

Rene Whitaker · « **Reply #3 on:** January 07, 2019, 07:24:00 PM »

Yes I agree! It looks Super Hyper!

Mark Mc · « **Reply #4 on:** January 07, 2019, 08:10:48 PM »

Well, I'll be ordering one now. I've been loath to trash my original NIB Hyper Viper, so this will be a good solution.

Now you just need to make a replica Cox Spook.

Mark

Fredvon4 · « **Reply #5 on:** January 08, 2019, 10:41:15 AM »

WHAT MARK SAID

Now you just need to make a replica Cox Spook

Greg Rodney · « **Reply #6 on:** January 08, 2019, 11:13:46 AM »

I'll have to add it to my ever growing list

I've still got to finish up the PT-19, FW190 (COX Super Stunter), Lou Wolgast's 1/2A Mirage, and the Jim Walker Firebird....

Ron Cribbs · « **Reply #7 on:** January 08, 2019, 06:46:24 PM »

I’ll third the Spook. I have rough plans and dimensions if you need them Greg.

RK · « **Reply #8 on:** January 09, 2019, 04:33:06 PM »

What engine size is recommended ?

Thanks, RK

Target · « **Reply #9 on:** January 10, 2019, 12:52:13 AM »

I definitely want a Mirage. Foam wing?

Greg Rodney · « **Reply #10 on:** January 10, 2019, 08:44:10 AM »

The Mirage will most likely be a built up wing. I tried my hand at a foam wing on Jim Walker's Firebird and it didn't come out all that good.

Target · « **Reply #11 on:** January 10, 2019, 02:59:21 PM »

Maybe just a fuse and tail kit for me. I'm pretty handy with foam.
Either way, the Mirage 1/2A, and the full size are on my wish list.

Greg Rodney · « **Reply #12 on:** January 23, 2019, 10:07:21 PM »

A few people were wondering about the "jig" for building the wing.
Here are few pix of the jig that comes with the regular kit.
It's very very simple, but does the job rather easily.
Works best if tacked down over the plans into a piece of drywall.
If you tack it to your wife's dinning room table...I NEVER HEARD OF YOU!!!!

Greg

Greg Rodney · « **Reply #13 on:** January 23, 2019, 10:09:12 PM »

A few more.

RknRusty · « **Reply #14 on:** March 16, 2019, 06:10:28 PM »

Hi Greg,
Mine is coming along. I'm still trying to decide between a Tee Dee or a Norvel Big Mig .061. The TD fits a little easier, but the exhaust vent is simpler with the Norvel. I gotta make the decision so I can go ahead and cut the vents.

Here's a pic from today with a TD sitting in it.
Rusty

Greg Rodney · « **Reply #15 on:** March 16, 2019, 08:05:13 PM »

I've always been a COX fan.
Just keep in mind the original weighed between 10 and 12 ounces and it flew pretty good with just the Production .049 in it.
I would suggest using a Master Airscrew 7 x 3 prop for your first flight if you're going to run the Big Mig.
That will give you plenty of "pull power" but keep your lap time down to just below 4 sec on 42' lines.
Here's a link

https://www.masterairscrew.com/products/gf-series-7x3-propeller.

Greg

Fredvon4 · « **Reply #16 on:** March 17, 2019, 10:26:31 AM »

GREG....next?

bunch of us waiting on the SPOOK.....WINK...HINT...PLEASE, grin

RknRusty · « **Reply #17 on:** March 17, 2019, 10:59:42 AM »

Quote from: Greg Rodney on March 16, 2019, 08:05:13 PM

I've always been a COX fan.
Just keep in mind the original weighed between 10 and 12 ounces and it flew pretty good with just the Production .049 in it.
I would suggest using a Master Airscrew 7 x 3 prop for your first flight if you're going to run the Big Mig.
That will give you plenty of "pull power" but keep your lap time down to just below 4 sec on 42' lines...

Greg

Greg, Thanks. I'm actually using another approach for achieving a good speed for a Stunt run, which I think better suits the pressure bladder feed. Rather than heavily propping the engine, I'd rather use a short flat prop so the engine runs in its peak power band where it's able to turn max RPMs and get the benefit of its SPI and no bogging in hard turns. I'll tame the speed with a low pitch, like an APC 5x2, 5.25x2 or 5.5x2. With the APC props, even a 6x2 will still allow either engine to peak. There is no other brand besides APC that will do this at 6" length. I know there are lots of people that'll think my approach is crazy, but I it works on 1/2A performance engines. If I was running on suction, this may possibly be different.

I started a build thread in the Open forum.

Rusty

Greg Rodney · « **Reply #18 on:** March 18, 2019, 06:38:47 PM »

Fred, Regarding the SPOOK!
The wing is designed...the tail feathers are designed...Fuselage is done as far as the 3D model goes.
Now to make sure I can hold on to it while the machine carves it without spitting a balsa block at me!
Amma gettin there!
NOW! I'm getting a few requests for the Hyper Viper as a 40 incher!

The SPOOK is coming!

Greg

Fredvon4 · « **Reply #19 on:** March 19, 2019, 11:40:32 AM »

cool

want one brother