RE: F27 STRYKER -Way Past the Limits Part 6 -Go deeper in to the Dark Side...

RE: F27 STRYKER -Way Past the Limits Part 6 -Go deeper in to the Dark Side...
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RE: F27 STRYKER -Way Past the Limits Part 6 -Go de... - 7/18/2007 11:59:18 PM

Posts: 142
Joined: 6/19/2007
From: Corona, CA, USA
Status: offline

How many days ago did I say "I'll finish my new build tonight". I didn't realize it would take me over two hours to lay down 13 strips of tape.

Probably thinking too much again. Anyways, just need to install landing gear and move the servos and motor over from the old to new bird and she will be good to go.

Maxamus, I like your reinforcement style. I prefer triangles, must be from my early college days when we learned about trusses. I also wanted reinforcement to the motor mount as with too much flex there it can bend the motor/prop upward during a throttle up causing the plane to pitch up. I also didn't add any reinforcement to the nose so it will be a breakaway point during a crash. But perhaps that is not an issue with you

Still confused as to why you can't run two motors off of on ESC. Should be no different then running 2 AC motors off of one outlet.

Back in my early flying days (Feb. 07') I considered running a Storm Launcher using two receivers (SL has receiver and ESC in one board) so I could upgrade to J250 brushed motors. Plenty of people over at RCGroups thought it either couldn't or shouldn't be done. But it worked.

How is Rustye running his two motors? Do you Y off the throttle port on the receiver?

~Bub

_____________________________

Fly it like you stole it

(in reply to maxamus)

RE: F27 STRYKER -Way Past the Limits Part 6 -Go de... - 7/19/2007 12:23:22 AM

Posts: 288
Joined: 2/18/2007
From: Novato, CA, USA
Status: offline

Stryker - Build 4 - - - - Results:

This was very interesting, and so much uncomplicated low cost fun...

I have learned something new on this build, and I think it might have some value for some of you here.

Maiden flight took place yesterday together with Gryphons oldest friend who was flying his Mega 16-25-2.

Didn't have any nose cone, got creative and quickly made one out of a recycled chunk of Styrofoam.
Cut a 7 inch piece, used the asphalt as a grinder to shape it, attached and covered to body with extreme tape.
Total time = 120 seconds.
Total cost = $0.00
Total weight = 17.1 oz / 485 gram (without batteries)

Time to launch...

Wow...

Unlimited vertical climb...

Speed surprisingly good with such low power input, P (Gryphons oldest friend) said I was faster then him, but I have to disagree on that one, I was flying on a TP 3S 2200mAh and he had a 3S around 4000mAh at the time...

It turns on a dime in a way I never seen before...

I purposely stalled her 3 times on high altitude, every time she went belly up and slowly started to fall down like a autumn leaf, throttled back on and she started to fly within seconds again...

Slow speed characteristics was like a glider, could easily and safely move on in 5-10 miles/hr...

Stall speed seemed like -5 miles/hr in the fading breeze...

First landing was crazy, speed dropped to zero unexpectedly fast while still on approach at 8 feet altitude and pushed by a gust she fell down on her nose... the plane just bounced back up...

I was stumped, no damage, nothing moved inside the frame, not even the battery...

Soo much uncomplicated fun...

Not bad for a build with a:
$25.00 motor 69 gram/2.43 oz Kv 2700 rated 30 amps continuous but can handle much more, temperature
was less then 95 F/35 C after first flight with a APC 5x5, 400 Watt 34Amp (will prop up next time)
$40.00 ESC 33 gram/1.16 oz rated 40Amp continuous (55A burst <10 seconds)
BEC 3 amps (5volts), 4 micro servos on 3 cell lipo, and 3 micro servos on 4 cell lipo

To me this was a completely new concept...

Stryker_Viking

_____________________________

~~~~~~~~~~~~~~~~~~~~~~~
- - - Altitude is still my best friend...

(in reply to hornetnz)

RE: F27 STRYKER -Way Past the Limits Part 6 -Go de... - 7/19/2007 1:06:27 AM

Posts: 2041
Joined: 7/11/2003
From: Charlotte, NC, USA
Status: offline

Stryker_Viking,

I hope this was not the same plane that he pierced with his Stryker while you were both flying and the tangled planes were heading out to the bay. At least that is how he told me the story or that is what I picked up. But I was busy and I really didn't get the whole story because I was distracted with what I was doing and I have not been getting much sleep lately either.

So what happened?

Gryphon

(in reply to Stryker_Viking)

RE: F27 STRYKER -Way Past the Limits Part 6 -Go deeper... - 7/19/2007 1:25:03 AM

Posts: 288
Joined: 2/18/2007
From: Novato, CA, USA
Status: offline

quote:

ORIGINAL: Hagar69

Right now I'm waiting for that 2950 kV motor that Depronjet informed us about a few days ago. Do not know if it is ideal on the Stryker, but it could be interesting on a sleeker design like my Depron JAS Gripen

Right now I have a Welgard 2200 kV on the Gripen, it is very fast.
Hagar

Hejsan Hagar,

I didn't know that you have a Depron JAS Gripen...
What dimensions do you have on that plane?
How heavy is it?
Speed?
Where is your CG?

I would also love to see a picture or two of it as I am building one as well and still am trying to figure out this and that... have not decided on which motor I will use, initially thinking about my Medusa Afterburner but maybe it would be overkill with all that power and weight...???
What do you think?

Ha det...

Stryker_Viking

Attachments

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_____________________________

~~~~~~~~~~~~~~~~~~~~~~~
- - - Altitude is still my best friend...

(in reply to Hagar69)

RE: F27 STRYKER -Way Past the Limits Part 6 -Go de... - 7/19/2007 1:41:48 AM

Posts: 2041
Joined: 7/11/2003
From: Charlotte, NC, USA
Status: offline

maxamus,

Per your request, I used my cam to take more detailed pics of where everything has been fitted on my plane. I know it is hard to fit things especially when you add the Co-pilot under the same hatches.

I took over a dozen pics ,not sure how many will fit in a post so I may only post a few.
Note: that last divider in front of battery was thinned out and one of my crashed pushed the battery forward and there is not much left.

***I secure all hatches with 3M extreme tape. Beauty is not my goal just safety and security of my plane. I have already had 2 crashes at speeds above some Stryker's top speed and this plane has survived. Part luck, and partly because it is a well built plane (in my fantasies).

**Note: I was flying with a motor mount that had all 4 motor bolt holes broken, and I used 3M tape and it worked perfect to keep it from spinning in place. It was propped with APC Sport 7X8 at 998W. I have 6 motor mounts and I just need to change it before next flight. So you will see 3M tape on motor mount.

I may add some comments for the pics after uploading them, lets see how many will fit.

The tunnel is pretty much as wide as the rear cover near the very rear and I also had to under-cut the sides to push ESC to one side and push the looped wires to other side.

Next to Co-pilot you will see a red calibration button, and also a hole that leads to the GAIN adjustment of the Co-pilot, with this hole, I can adjust the Gain without pulling the covers off.
You can see that in the pics I yanked the Co-pilot out of its hole to show more detail. You can see the dip switches on the last one.

Gryphon

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< Message edited by Gryphon -- 7/19/2007 2:48:34 AM >

(in reply to Gryphon)

RE: F27 STRYKER -Way Past the Limits Part 6 -Go de... - 7/19/2007 2:50:35 AM

Posts: 2041
Joined: 7/11/2003
From: Charlotte, NC, USA
Status: offline

maxamus,

Here are the last few:

1st one shows Elevon profile and attachment point (height wise). Look to see the bottom is covered with 1/32" plywood (30min epoxied).
2nd one shows the top of balsa elevon.
3rd one shows the bottom of Elevon

Hope these help my friend. Looking forward to seeing your 16/25/2 and its high speed video's.

Gryphon

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< Message edited by Gryphon -- 7/19/2007 3:04:06 AM >

(in reply to Gryphon)

RE: F27 STRYKER -Way Past the Limits Part 6 -Go de... - 7/19/2007 3:27:45 AM

Posts: 288
Joined: 2/18/2007
From: Novato, CA, USA
Status: offline

quote:

ORIGINAL: Gryphon

I will edit an add to this post,

Yesterday after work, as I pulled in front of my place, my co-worker called and said if I wanted to go hang out with him while he went to a customer site. I said sure, 15 minutes into the drive; he says it is so nice to ride with someone for a 1 1/2 trip each way...thank you.

I couldn't believe my ears....he ran into several bad issues at the customer site and I got home 7 hours later...without pay.......

That is why I was not around last night.

When someone tells you something....ask questions be specific...I wish I was (last night).

Gryphon

...and I failed to do the same, though the "visit to the bar" didn't take 7 1/2 hour (thank's to the god's?)...
...however - long enough for me to forget to call you...

_____________________________

~~~~~~~~~~~~~~~~~~~~~~~
- - - Altitude is still my best friend...

(in reply to Gryphon)

RE: F27 STRYKER -Way Past the Limits Part 6 -Go de... - 7/19/2007 4:28:33 AM

Posts: 177
Joined: 2/19/2003
From: Somewhere, USA
Status: offline

Hi Gryphon, are you running a BEC in there?

Also, are there any other ESCs available that don't require a BEC at 4S and above besides the Hyperion ESCs?

(in reply to Stryker_Viking)

RE: F27 STRYKER -Way Past the Limits Part 6 -Go de... - 7/19/2007 4:33:50 AM

Posts: 288
Joined: 2/18/2007
From: Novato, CA, USA
Status: offline

quote:

ORIGINAL: Gryphon

Stryker_Viking,

I hope this was not the same plane that he pierced with his Stryker while you were both flying and the tangled planes were heading out to the bay. At least that is how he told me the story or that is what I picked up. But I was busy and I really didn't get the whole story because I was distracted with what I was doing and I have not been getting much sleep lately either.

So what happened?

Gryphon

...hehe... so you heard the story how he made our two planes become one huhhh...

No worries, it was my own design of a 3D/trainer that ended it's life up there after getting rear ended by a mean Stryker doing at least 80 miles/hr while hovering...

Totally taken by surprise, and after seeing both planes becoming one and slowly descend drifting out towards the SF-bay, our friend said: S....., do something.......!!!!!!!!

And I did, throttled up and -voila separation completed....

Unfortunately it wasn't the plane at fault who instantly accelerated straight down to the ground, but mine - of course, Murphy's Law?

Result? See picture...

Stryker_Viking

Attachments

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_____________________________

~~~~~~~~~~~~~~~~~~~~~~~
- - - Altitude is still my best friend...

(in reply to Gryphon)

RE: F27 STRYKER -Way Past the Limits Part 6 -Go de... - 7/19/2007 5:00:25 AM

Posts: 288
Joined: 2/18/2007
From: Novato, CA, USA
Status: offline

Hey Ace Dude,

I know of one ESC that does, if the capacity is enough for you...???

See my post on the previous page with pictures showing my last "cheap" Stryker build.
It's called "Pentium 40" from the same dealer that has the special version motor called "Ron's Wicked 450"

"Ron's Pentium-40 ESC"
$40.00
33 gram/1.16 oz
rated 40 Amp continuous (55A burst <10 seconds)

BEC 3 amps (5volts):
4 micro servos on 3 cell li-po
3 micro servos on 4 cell li-po

This is the only one I have personal experience of with this kind of capacity on the BEC.
I am more then happy with this smooth acting ESC, seem to contain high qualilty components as well as overall design and features.

http://www.donsrc.com/cart/index.php?act=viewProd&productId=3

Good luck,

Stryker_Viking

_____________________________

~~~~~~~~~~~~~~~~~~~~~~~
- - - Altitude is still my best friend...

(in reply to Ace Dude)

RE: F27 STRYKER -Way Past the Limits Part 6 -Go d... - 7/19/2007 5:01:47 AM

Posts: 2041
Joined: 7/11/2003
From: Charlotte, NC, USA
Status: offline

Ace Dude, No the UBEC is not in there right now( flying on 3S only). It goes in the front right dug into foam and flush with the side wall of the battery area.

As soon as I solder up the new 16/25/2 2650KV motor, I will put that Medusa Research 3.5A UBEC and OPTO Isolator back in. The last 16/25/2 will be send in for a shaft replacement (my fault).

_____________________________

Stryker_Viking

That plane does not look like the same foamy that you first installed the Co-pilot on. Was it called the Tribute? Which one is this one?
Better to be a 3D foamy than a new Stryker.

Our friend told me that it was really an accident. I believe him. I know the other people didn't get hit by accident, but with you he gasped for a second due to shock. He didn't want to make contact with your plane one bit.

I'll try calling you in a few minutes.

_____________________________________

To the guys who are building the 16/25/2 setup, I hope you found these pics more useful than the last low resolution pics that I e-mailed you. Although I feel it might be a little late now. I hope to hear about your flight reports before too long.

Gryphon

< Message edited by Gryphon -- 7/19/2007 5:09:11 AM >

(in reply to Stryker_Viking)

RE: F27 STRYKER -Way Past the Limits Part 6 -Go de... - 7/19/2007 5:08:38 AM

Posts: 183
Joined: 2/28/2007
From: Virginia Beach, VA, USA
Status: offline

quote:

ORIGINAL: BubbleGum

Still confused as to why you can't run two motors off of on ESC. Should be no different then running 2 AC motors off of one outlet.

~Bub

After doing some research, the answer seems to be it just depends. Primarily need to be sure the ESC is rated to handle the combined current. Some of those reporting running two motors off of one ESC range from it not working to working with no issues. One reported no issues other than sometimes taking two or three throttle-ups to get both motors running. Novak on their website specifically states that two brushless motors can be run off their ESCs. So, maybe the best action is to contact the manufacturer and ask them. If that's not possible, I didn't come across anyone actually saying they fried an ESC by doing this though there were those that thought it was a possibility eve