F-27C Stryker - Beyond the Parkflyer - Page 1030 - RC Groups
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Oct 29, 2012, 04:26 PM
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brolley's Avatar
Quote:
Originally Posted by moparmyway
Looks like a Sikorsky or a Bristow
You mean like this one?
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Oct 31, 2012, 05:37 PM
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Looking for a safe prop size to start with. 6s 3300, hv 120, mega 22/35/1.5es.
no load data
Oct 31, 2012, 05:45 PM
Livin it UP when Im goin DOWN
Arcteryxxx's Avatar
Quote:
Originally Posted by tippy1404
Looking for a safe prop size to start with. 6s 3300, hv 120, mega 22/35/1.5es.
no load data
Any APC 6.5 pylon is safe, also medium pitch 7 inch props I guess. I run mine with APC Q40 7.4x8.1 on 5S. Motor burned with 8x8 on 5S....


EDIT: Sorry mate, I was a little too quick to post. I was referring to the 22/35/1.5ER, so the data don't apply...
Last edited by Arcteryxxx; Oct 31, 2012 at 06:06 PM.
Oct 31, 2012, 08:49 PM
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GryphonRCU's Avatar
tippy1404,

The no load ICE log attachment is not usable as you have posted....if trying to show the KV.

I suggest you zoom in so that the span of the graph is the same as ICE window.
You can place the curser 1 second after peak AMPs....we can then read the data from the top line of table below the graph called "mouse".


better yet (for KV) :
...maybe left edge of window 1.0 seconds after full throttle, and right edge 1 to 2 seconds later (shorter duration if test was shorter). Normally we log at 10 times per second for tests....even a half second wide window is ok enough that way.
Anyway, if you zoom in this much, we can just use the displayed "average" values.

Edit: I added a sample chart.

RPM / voltage = KV

if you ran the motor few times, use first graph.
make sure you start your test with motor at room temp.
Warmer = shows higher KV
Cooler = shows lower KV.

___________________________

Note: always disregard the AMPs as reported by ICE during KV test. Numbers this far below 40A as reported by ICE can not be trusted. called ( Io ).
If you want to know the Io value (no load AMPs) use your Wattmeter.


Gryphon
Last edited by GryphonRCU; Oct 31, 2012 at 09:02 PM.
Oct 31, 2012, 10:54 PM
St. Louis
Foambird's Avatar
What?
Nov 01, 2012, 05:03 AM
Registered User

Spares


Does anyone in the UK or Europe know where I can get nose and canopy spares?

Several stores claim to have them, but they are on backorder.

Many thanks
Nov 07, 2012, 05:44 PM
Registered User

Stryker 1st Data Run


6s 3300 35-70c, hv 120, mega 22/35/1.5es, 7x6 prop.....trying to figure out what prop to try next.
Last edited by tippy1404; Nov 07, 2012 at 05:49 PM.
Nov 07, 2012, 08:04 PM
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brolley's Avatar
Nice job Tip! I would run the same prop again but with longer WOT. She what it looks like unloaded.
Nov 08, 2012, 06:42 AM
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Peter M's Avatar
Tippy,
Is that photo saying your Stryker is stove hot?

Yeah, longer runs and a 7x7 would be your next step. Trying some Q40 or cut down 8 inch Sport props would be the next step after that. Just go a step at a time and feel your way.

Also consider another cell and/or a bigger capacity battery as your current battery isn't holding great voltage under load.
Last edited by Peter M; Nov 08, 2012 at 06:47 AM.
Nov 08, 2012, 09:51 AM
Livin it UP when Im goin DOWN
Arcteryxxx's Avatar
Tip for Tippy: get a MPI heatsink for your 22/35.
Nov 08, 2012, 11:43 AM
Some call me the other guy!
DoctorAudio's Avatar
He also need a pedicure.
My wife said your foot looks like it needs some love!
Hahaha!
Nov 08, 2012, 03:57 PM
Registered User
Well I got my Stryker rebuilt and just for fun I added 1.5 inch rudders. Hope to remaiden on Saturday. Anybody else tried rudders, knife edge, etc?
Nov 08, 2012, 04:17 PM
Livin it UP when Im goin DOWN
Arcteryxxx's Avatar
Quote:
Originally Posted by mxz1998
Well I got my Stryker rebuilt and just for fun I added 1.5 inch rudders. Hope to remaiden on Saturday. Anybody else tried rudders, knife edge, etc?
Multiple pilots have tried it before on a B or C model. Lots of posts around.
And then the Q came along....
Nov 08, 2012, 06:47 PM
Registered User
GryphonRCU's Avatar
Tippy,

Make sure your hingeline is sealed.

Increase your AMPs while still on 6S with respect to motor temp and battery capability.

I also think that your motor is about a 7S max motor in this application (very capable Low KV motor).
Do not run 6.5" diameter prop on 7S. Run 7".
If you ever get a 7S, the cells need to be more capable than your current cells.

Compared to both more AMPs "and" another cell; You may currently have your motor at 60% of max Watts for single high speed passes.
Expect conservative 20MPH speed increase if you decide to push that far....possibly 25MPH increase.

Arctery and PeterM can help you more than me given their previous experiences with 22/35/1.5E (S or R? ) and 22/30/1.5SE (respectively).


I think MPI has 36mm heat sinks in 2 different lengths. The more of the motor you cover the cooler it will run. Some guys run 1 1/2 or 2 heat sinks.


Good luck,

Gryphon
Nov 08, 2012, 07:43 PM
Registered User
Thanks for all the input. Next run 7x7, heat sinks on the motor, sealed hinges and maybe a little more yellow she gets away from me pretty quick.


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