AndyKunz

I was digging around in my old photos today and found some of my very first Shrike. I built this in 2008 in the hotel when I first moved to Champaign to work for Spektrum.

The date on the photos is 25 July 2008.

Andy

AndyKunz

Before Flying Models went away I was able to recover my rights to the Shrike 180 and Neo 180 plans and articles. If you're interested you can contact me through my personal website www.andykunz.us - click on "Magazine Articles" when you get there.

Andy

AndyKunz

Yesterday I cut lettering for my big Shrike using my laser cutter.

Next step will be to change the nose door to two doors so it can't hit the ground on a munged taxi.

Andy

4dogspete

Shrike 40 - electrified. I am trying to find a high RPM 60-size elelctric motor for my 40-size Shrike. Anyone have suggestions? Most 60-size outrunners are fairly low rpm and use very large props. Trying to find some thing that will turn a 60-size electric motor with a max - 12" prop. Maybe that isn't practical???

Mtthwacrss

My Feedback: (1)

just picked up a 10-15 shrike Kit. If anyone needs a set of plans let me know.
I will be scratch building one this winter. I will be saving the kit.

W4DJW

Just finished framing up a kit I've had for about 10 years. Going electric with the G46. 13,400 RPM on a 12X8 prop with a 5S 3,300 mAh battery pack. Should hit 101 mph if my calculations are correct.

4dogspete

Thanks for the reply
What motor is the G46???

W4DJW

A Hobby King electric replacement for a nitro 40-46 engine:

[h=3]Battery: 4~5 Cell /14.4~18.5V
RPM: 670kv
Max current: 40A
No load current: 10V/3.9A
Current capacity: 55A/15sec
Internal resistance: 0.04 ohm
Weight: 303g (not including connectors)
Diameter of shaft: 6mm
Dimensions: 76x50mm

Required;
60A ESC
4S~5S Li-Po / 12 ~ 16-cell Ni-MH/Ni-Cd
12x8 ~ 14x10 prop
Suitable for sport and scale airplanes weighing 4 to 7 pounds (1.8–3.2 kg).


[/h]

AndyKunz

All the time! This past summer mine was my most-flown model.

Andy

W4DJW

Nice Shrike Andy! Like the retracts and larger tail section. Have you ever put an AS3X in a Shrike? I ordered two more AR636 receivers, one for the current Shrike build. Thinking the stabilization will make hand launches much simpler.

AndyKunz

I might for next summer, just to play with it. It really doesn't need it - it grooves nicely.

Andy

W4DJW

I know I'm a lot late to the party but I must say, this is a fantastic shrike club! All the references to the build threads are most helpful. Sorry I didn't find this thread until my 10+ year old kit was already framed up. There are a few things I would have done differently. Like the thicker R1 ribs (I have a 3 axis CNC router and could have made replacements) and the wider tail for more elevator authority on landing. I did see someone mount the elevator servo in the hollow space behind F4 and did make that modification before covering the fuselage. Getting more weight aft is good for the CG and eliminates / simplifies the linkage passing through the area where the magnets are holding the hatch down.

For the elevator authority at landing, I'm thinking the shrike is at it's most basic a flying wing with elevator assist for pitch control. Has anyone tried "elevon" mixing? Mixing the ailerons with elevator in the transmitter as is done on flying wings without an elevator? I'm thinking that would give more elevator authority at landing.

Again, great thread. Sorry I'm so late getting here :-( Control surfaces are hinged and covered. Need to put breather holes in the bottom to let the heat/ pressure out of the fuselage and I'll be on to finishing up with the rest of the covering. All up weight is calculated to be 3.5 lbs. Static thrust should be 5.19 lbs on a 10x8 prop for 101 mph at 1 kw draw on the G46 motor (I'll need to keep that to less than 15 second bursts).

AndyKunz

Mine can be flown on the tail only, as each surface has a separate servo.

Andy

W4DJW

Anyone else out there building a Shrike 40?

W4DJW

3D Rendering:

https://youtu.be/_YlrYRPETcg?list=PLg36b42BUeEOr1M_p3vhypK0Dwr_GSIu_

W4DJW

Two Shrike 40's racing in virtual reality:

https://youtu.be/TeIsLXx-mjI

AndyKunz

They're not banking hard enough for those turns!

Andy

W4DJW

Good to know from someone with real life experience with these aircraft. I'll dial in a little more and re-render.

AndyKunz

You want them 90 degrees over on a tight turn, 70+ for more gentle.

Here, watch the maiden flight:

https://www.youtube.com/watch?v=Rd9Tx_xDi0c

W4DJW

I watched your maiden flight video several times already. Great maiden! Paid attention to the banking this time and I see what you mean. Went ahead and modified the bank angle and perhaps overshot.

Need to extend the approach, narrow the camera angle & follow the lead or 2nd place plane from the ground view to make it more realistic. That will take another render which is a couple hours. Renders happen while I'm downstairs in the airplane room covering.

Went to the hobby shop today to get the fiberglass for the wing roots and the covering. Think I'll go with the blue, green and white covering. Video helps know what it's going to look like at the field.

You'll want to bump it up to 1080p60 and full screen to see the Shrikes up close:

https://youtu.be/OVxqda2ymmU Dave (W4DJW)

W4DJW

Made some updates to the banking and added some high speed low flying.

https://youtu.be/y8o_RwJp7iE

Strykaas

Why those animations ?

Mustang Fever

My Feedback: (2)

I guess because they can.

W4DJW

To visualize the covering before covering.

AndyKunz

Here's a video of a real Shrike flown by the original designer.

http://rcairgallery.com/rcairgallery...urbine.mp4.php

Andy