nexxa

Just want to share my work.
Maiden flight - next weekend, and for sure I will bring my video camera, and post result.
Still remaining work to do.... finishing the covering, installing radio gear, motor.... cg, balance....

Final expecting weight: 2.5 pound
Spec:
6 oz gaz tank
3 standard JR servo, receiver
4.8v 1100 mAh Ni-Mh batterie
OS.32SX on mac Tune pipe
Prop APC 8X8 (17 250 Rpm) or 7.5X9 (18 250 rpm)

Mod:
1/4 inch carbon rod in the wing
shorter ailerons + wing tip
firewall back by 1 inch (for cg)
1/8 carbon rod for rudder
belly skid

ChuckL

My Feedback: (2)

Looking good should be a blast to fly

Julian537

My Feedback: (9)

Is that really the 10? or is it the 25 size. I thought the 10 was a 400size?

nexxa

Yes it's a Shrike 10 for a .10 to .20 engine (.10 to .25). 35.5" inch wing.
But the Shrike 1/2 is 25" inch wing and is made for a speed 400 or .10 and less

Julian537

My Feedback: (9)

This should be really fun!
good thing it is not the small one. the wing loading would be terrible.
I have been thinking about getting the 400 size and putting a mega 16/15/3 in it.

soarrich

My Feedback: (98)

I like the V tail. I have a 40 size with 3 tails, different is cool.

nexxa

Still in progress....
Remaining radio gear and engine installation.... It will be ready for the week-end!

nexxa

Finaly finish!!!
Test flight tomorrow (sunday 10 sept)

Just hope I forgot nothing!

Final weight. 2.8 lbs
OS.32SX Mac tune Pipe
APC 8X8 17 250 RPM

combatpigg

My Feedback: (3)

That's one of the nicest looking Shrikes I've ever seen! Hope you have lots of fun with it.

HaveBlue

I have to agree with combatpigg..that is the coolest shrike I have seen...good luck with the maiden[sm=thumbup.gif]....love the scheme..and sounds like it will be a ball

WMB

My Feedback: (1)

That is sweet. Mine has a lot of elevator travel when on high rates, really helps with landing.
Have fun with it, MikeB

Strykaas

Can't wait to hear how it goes. By the way, do you have any plan to tape her ? I remember the Kawassaki Shrike, very cool vid ! I guess yours will have similar performance

nexxa

WOW!!! It's a missile!

Sunday it was the training day at our field. Beginners have priority on the field. But I have a chance to fly it 3 times. The first take off was erratic. Not enough elevator and too much ailerons. I was able by chance to land (crash) it on the runway after a 30 seconds flight. It takes me a lot of concentration to make it back on the runway. I wasn't able to make it back; every input on the remote was making the plane roll on it self. Very tricky. I broke the prop and the spinner.

Go back on bench, remove 50% of ailerons throw, put 50% exponential, and 50% more elevator. Change the spinner, the prop, and go again... Amazing... I can control it now, try 2 or 3 high speed pass, need to trim it again, to much sensitive... but very controllable....

The third flight (the video one) was not to bad, still a little bit too much nervous, but I start to have fun. Remaining some trimming to do, to make it perfect, but I'm close.

With an APC 8X8, the plane do a 236 Km/h (141 Mph) after a medium dive and 216 km/h (129 Mph) on flat flight, not bad. The engine on ground run this prop at 17 300 rpm, in the air it unload a lot, the sound is too cool. Like I said, they were many beginners on the field. It was just too cool that day. Everyone was there and watching this little plane screaming in the sky.... . The only sound we can hear was my plane!

Now, I will try other prop, I can go with more pitch and less diameter, like a 7.5 X 9.

I pass the camera to a friend, he tries to film this little plane, but by chance he's a better pilot than a cameraman!!! We can hear it, but sometime we saw it!
Next time I will bring a better video.


[link=http://207.96.235.218/videos/sebastien/shrike_1.wmv]Shrike10 first flight[/link]

cncswiss1

has the pipe/ header setup been trimmed? it looks a tad long, and from my memory you should see 18k with that setup

nexxa

Yep, I tune it on a test bench. But it was a very hot day with a high humidity factor. I stop cutting the header after blowing 4 glow plugs!

I need to tune it again. Too many factors have change. I use 25% nitro with 1 head shim, a medium/cold plug (Enya 5), an APC 8X8 prop. It runs a little rich, I can get 300 more RPM just by leanning it a bit without trouble.

I will try many props, until i make my choice, and re-tune the header.

Strykaas

Nexxa,

Holy crap, this is the fastest Shrike .10 I have seen, ever [X(]. Well congrats for coping with this beast [sm=thumbup.gif].So many thanks for taking the time to share this vid !

Landing is so fast, aren't you sure you have too forward a cg ?? You should be able to flare it much more

I think your reinforcments are pretty good, very high G turns were performed... take care, a friend of mine had his wings folded after the tenth flight or so...

cooperfly

nexxa - I am thinking about building the same frame with a .28 Magnum (stock muffler at this time)- any suggestions -

nexxa

I not the best guy here to give tips on building! I always do my kit on the heavy side. I always put to much wood, epoxy and CA. I learn to fly alone, after breaking plane over and over; I start to make it so strong they can! break anymore!

But, I think everybody will agree, put a carbon fiber tube in the wing. It will reinforce this weak part. Folding a wing in a high G turn is bad. You can put some 3/8� square balsa spare in the stab to give it some rigidity and laminate these rudders with 1/32 balsa, they are so thin and fragile. You can put back by a 1/4" or ½� the firewall; It will be easiest to balance the model. Me I put back the firewall by 1", it was too much.

Ailerons throw are very important, I only use 1/8� up and down ailerons. The fist flight it was set to ¼�, and It was practically impossible to make it turn without making 2 rolls at the same time!

A good example of are strong are my plane. Check this small video.

[link=http://207.96.235.218/videos/sebastien/shrike_crash.wmv]Test flight 2[/link]

For sure I make a good checkup after to see if something was broken. Just broke the prop and spinner. The first one, I take off full throttle. The engine thrust make the plane roll left a bit. On the second try, I try it half throttle, it was just not enough!!! I decide to kill the engine and try to land it before hitting somebody by trying to recover my bad take off.

nexxa

Thanks all.

Yes, it was on maiden a little bit nove heavy. But the landing speed is due to my inexperience with this plane.
I made other flights with it and now I'm able to land it on the center of the field, not 3 miles away!

I will post an other video this week. Now I have some real good pictures to show.... just need time to edit it.

izzy

nexxa , the video is great , it inspired me to build one, so i am placing my order for 1 right now

what header are you using on the engine

if it is a macs, is it the short or standard header

thanks
izzy

cooperfly

Nexxa - thanks for info and help - I think I am going for it - won't be as fast but should be fun

thanks

coop

nexxa

izzy - I'm using this:

The Header is a MAC Header # MAC2340 (.20 to .32)
The Tune pipe is a MAC Pipe # MAC1120 (.19 to .25)

izzy

thanks nexxa

by the way i read in the shrike club thread, that someone built a shrike 10 with os 32 , but reduced the height of the ribs throughout buy 1/8 each side to get a thinner wing and more speed

i am ordering my shrike 10 as we speak, this thread has made me drool

ChuckL

My Feedback: (2)

That is a great looking bird

Razor-RCU

My Feedback: (50)

Jizzam yo! That is one of the best looking Shrikes I have EVER seen! Beautiful!!!

Trim that header-- [X(]