Murdo! That was great!!!

You've got to be in the running for the most menacing looking Stryker ever! No girly fluros for you LOL! (I dunno how you can keep sight of it though!)

Do you have an ICE log to post as well????

Regards
Peter

That was absolutely breathtaking, Murdo!
I'm sure you have left some permanent holes in the Texan skies with those runs.
Anxious to see the doppler readings - my guess: 330kph (205mph) At least this is what it sounds like!

-Arcteryxxx

Peter and Arcteryxxx,
Thanks!!!

Arcteryxxx,
Dude, you are setting the bar WAY high! ACK!!!

The 8x8 prop WAS turning at a hair over 28,000, giving a pitch speed of 212mph. So your ears are very well calibrated if you take Mopar's findings on the 8x8 pushing the plane to within a few mph of pitch speed.

But it looks like I have some drag cleanup to do on my airframe. Actual airspeed was less than the 212 pitch speed by more than a few mph.
I do have the motor wires hanging out pretty messily, and haven't quite figured out how to get them better tucked in. I think my verticals also came out a little on the large side. They'll be going under the saw shortly. The packing tape hinge gap wipers are also thicker than I'd like, so I'll be looking for a new material to make them from.

All said, though, it WAS fast!
And it's nice to know it has the ability to go faster! The Green Monster motor was running at 84% KV efficiency.

Yeah! That was what I heard.

And: pessimism is NOT my trade!

Congrats Darren, it looks like you have tied the speed record of a full bodied Stryker with yours. My dopplering shows about 185 mph average from both fastest direction passes. Does yours still have the air brakes ??

#1 186mph
#2 182mph

#3 188mph
#4 181mph

I believe I said that was for speeds under 170 mph. The 8 inch props really shine up untill the 170's, then they fall off very quickly. You go 175 and the pitch speed is closer to 185-190 and it just keeps getting worse as you go faster !!

You know I won't tolerate air brakes on any of my birds!
Even if it bumps me into a "Modified" airframe category.
They're still kind of there. Just streamlined...
That's the only thing shaved on this plane, though, aside from the modified elevons and modified profile verticals that I'm pretty sure King Lymey is running.

I tried a couple more flights yesterday on 8x8 again and even 8x9, but high winds made it nigh impossible to line up for decent Doppler passes, and the speeds came out slower.

I'll have to wait for a calm day and try the 8x9 again, and maybe even
play around with some cut down 8.75-9" 40 Pylon props to get the thrust up.
Seems like every time I say that a certain diameter will be all I ever need, I find myself needing more! The next build may have to include widened vertical fin spacing, as the stock location will allow for 8.5" and no more!

Check it out!

We got a spectators' view video of my plane flying at over 180mph!
(Doppler speed was taken from a separate camera on a tripod)

Check out that landing! All skiddin' and no ploppin'!

This thing sure is a rush!

http://www.youtube.com/watch?v=nTr7vl63RNg

Hi all,

Looks like Eagle Tree systems has recently come out with the V4 eLogger.

Same cost.

Can be set to 5 times the recording speed (50 Hz) and has 16 times the memory capacity if I am remember right.

Max voltage increased up to 80V


http://www.eagletreesystems.com/MicroPower/micro.htm


Gryphon

murdnunoc,

Congratulations on your speed search......you did real good.


That is some serious seed.

I had problems trying to log on for the last couple of days, but tonight I managed to do it through the home page....instead of the sign-in button on upper corner of this thread (wouldn't open up a good window to enter user name and pass word).

Better posting late than never.


I'm very impressed....AND YES, that is one mean looking Stryker.


My Crystal ball tells me that you will fly faster within 2 months. [8D]


Hopefully we hear 200 MPH reports by end of Winter.....from anyone.....I love to see you fly at 200 MPH.



Your friend,

Gryphon

Awesome video, Darren!
Added to my favourites...

Thank you, Gryphon!

No doubt your crystal ball is right that I'll be seeing better speeds with better efficiency early next year.

I think this Green Monster still has some more to give in the meantime. I don't have much reference as to how many watts it takes other motors to turn an 8x8 at 28,100 RPM (in flight), but I have a hunch it's doing pretty good.

I think my batteries are showing some hurt from an earlier mild crash on a previous plane. They got a little bent and don't seem to be putting up voltage like they did before. Thought it was the temperature, but I've flown with them warmed up and they still sag pretty badly.

Since I'm out of stuff to play with on the 6S 6200mah setup, I'm going to have some fun this weekend and put 8S (comprised of 2 new 4S packs) in it to see how deep into supersonic I can turn a 7" prop.

4100 watts for 27,850 rpm in the air was the most efficient watts use I have seen yet.
4650 watts for 28,250 rpm in the air on a VERY windy day

I would say that the green monster has WAY more to give, and is using its power at the highest bar thats been set, easily better than what I have seen.

It still needs another cell !!!!!!!!

I actually had the exact motor in my hands yesterday @ my LHS, they have a sticker on it for $99. Too bad my situation dictates leaving it there for another customer to ponder over, but I am more than happy to (at this point) share the torch with Murdo, and in the near future, hopefully I will be able to pass it over to Murdo as well, unless of course Gotboosted (or some other "dark horse") beats Murdo to above 185mph average passes.

I have had ALOT of fun, but my time has come.
Good Luck Murdo and Gotboosted !!!
(you Dudes are gunna need it)

Hi all,


Happy holidays to all of you.


Marry Christmas to those of you who celebrate it.


Wish you all the best.


Gryphon

MERRY CHRISTMAS, EVERYONE!!!

Hope you all have a wonderful holiday filled with fellowship, relaxation, and pondering your next move into the Crazy Dark Side!

TWIN STRYKER BUILD:

When I left off on Page 17, I had installed the servos.

Hinging the elevons with a 3M Mailing and Storage Tape hinge works well. I'm confident in its security for this lite build. Haven't proven it yet on a super heavy, but I know the tape hinge is bullet proof when done right.

The servo wires had to be routed under and around the carbon tube frame. To tunnel under a carbon spar, I use an Allen key heated up to bore under the rod. The wires then poke up right at the edge of the electronics bay where they can be neatly tucked away.

The hot wire loop in the soldering gun again makes quick and neat work of cutting a hole for the AR500 receiver.

Sticking on the appendages:

I left the nose-to-tail carbon tube long ahead of the nose to give the nose cone a little more support. This requires boring a hole in the nose cone for the tube to fit into. Spinning a scrap of tubing in a drill cuts the hole nicely. The nose is then hot glued to the fuselage.

I'm using wingtip verticals for this plane, since the twin motors occupy the space of the normal Stryker verticals.
Wingtip verticals can be smaller than a single central fin, as they are located farther aft than a fin in the center. This gives them more authority for their size. They're made from 4mm Coroplast material (sign stuff) so they're incredibly durable. And cheap/free!

My paint schemes are usually a "make it up as you go" operation. Sometimes they work, other times... not.

I like how the top came out, but the bottom looks a little cheezy. But oh well, this plane is about fun flying, not looks!

The hatch is the final touch.

I do the "funny car" lid on all my planes. Just makes it easier to get to all the gear when I want to change something, which is nearly every flight!

All three pieces of the hatch get hot glued together. Roughing up the glue joints with the tip of a knife makes a much stronger glue bond.

A nylon hinge is slotted in and hot glued at the nose/fuselage joint. The other half of the hinge is then glued to the front of the hatch. You can further strengthen this joint by drilling and gluing some toothpicks through the hinge and into the hatch. I didn't do it on this one, but it's good added security if you're running big batteries.

The two 40A ESCs go on edge into a widened motor wire slot. A piece of safety wire runs over the ESCs and loops under the fuselage and around the carbon nose-to-tail tube. The main hatch is cut short of the ESCs since they stick up pretty high.

Hey Murdo,
Do you think if you mix rudder into your separate throttle channels that you will have enough differential thrust to do knife edges?

Humm...

Peter...

You're getting frighteningly good at reading my mind! [sm=lol.gif]

That's actually been my main intention for this twin from the get-go! It took a little playing around with the radio mixing, but I got it worked out pretty well. Takes two mixes.

Throttle -> Rudder +100%
............................. +100%

Rudder -> Throttle -100%
............................. -100%

One ESC is on the Throttle channel and the other is on the Rudder channel. With these mixes, both throttles work together on the throttle stick, but when the rudder stick is applied, one increases while the other decreases.
Works like a charm!

IN FACT...


[link=http://www.youtube.com/watch?v=j-j7Q1rrgwg]DOUBLE TROUBLE VIDEO!!![/link]

.

Let me tell you it ain't that difficult!

Entertaining video with great sound track! BTW: Love the flat spins!

You seem to be very prolific with your Stryker builds lately. Are you on vacation? (Or..... weekend detention!?! )

What's the next step with the Green Monster? More pitch and higher currents or just waiting for your 22/60?

Regards
Peter

I really have been on a build binge lately. Just can't seem to get enough of it!
If I'm not working, I'm building. Little bit of food and sleep in between.
At least I'll have plenty of toys to play with come springtime.

Best thing for the Green Monster setup is to get more volts to it. I've been running 6S 4000 and 6S 2200 in parallel for 6S 6200, but am not getting good volts on the setup. Think the 4000 cells have sustained crash damage.
I do have a 6S 5000 30C that hasn't seen much abuse yet. I can try running that with the 2200mah and get 6S 7200 and see if that gets the voltage up at all.

I don't really have 7S capability in the capacity I'd need to run this thing.

But I DO have a pair of 4S 4000mah 45C packs not getting used right now that I could run as 8S 4000!

That will mean stepping down to 7" props from the 8x8 that I was running on 6S. But it should be fun one way or another! And LOUD!!! If I stay with 7x5 and 7x6 I may even generate enough thrust to get the plane within 80% of pitch speed. We shall see...

<span style="font-size: larger; "><span style="font-family: 'Times New Roman'; ">M<span class="Apple-style-span" style="-webkit-border-horizontal-spacing: 1px; -webkit-border-vertical-spacing: 1px; ">urdnunoc,</span>Just stopped by to say congrats, you guys have definitely been bitten by the SPEED bug.</span></span>


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