The1User,

Lets go through what you asked for...

You want stock flight times.....o.k. if we flow twice the AMPs as stock, we need twice the battery capacity in mAH.

(Keep in mind this motor can flow more than 3 times the AMPs of what the stock out of the box F-27C flows in AMPs)

Stock flows about 25A with a 6X4 which drops AMPs in flight because the pitch is a good deal less than diameter...and it has 3S 2200 mAH

5000 mAH / 2200 mAH = 2.272 times the AMPs of stock motor will get you same flight time on 5000 mAH cells.

25A X 2.272 = 57A

57A on 3S will get you 100 MPH only if using 1:1 diameter to pitch ratio, it would not unload much, so you would be a little below stock flight times and you will not fly 125 MPH that yoiu want......BASICALLY 3S is not an option.

Now lets see if 4S-5000 will get you what you want.

We are still looking at 57A but will have 1/3 more volts.

Units of power are Watts

W = A X Volts (volts read under load....meaning with motor running).

Under same AMPs, the 4S battery will hold same voltage as 3S.

So 4S will get you 1/3 more Watts.

*** EXAMPLE OF Cubic relationship of power and speed: To fly 5% faster which is 1.05 times the speed; 1.05 X 1.05 X1.05 = 1.15 so 15% more power is needed to fly 5% faster.

Now lets work backwards to see how much 1/3 more power will get you in extra speed:

Cube root of 1.333333 (which is 4/3 power of what is needed to fly at 100 MPH): 1.3333^0.3 = 1.10 times the speed....10% faster.
57A on 3S will get you 100MPH with 1:1 prop......same AMPs on 4S will get you 10% more speed...so that will be 110 MPH.

*** Now with a prop like stock which has less pitch than diameter, you will unload AMPs and give up speed (compared to 1:1 props) ...you need to unload AMPs because you want the "STOCK" flight times....soooooo you will not be flying 110 MPH on 4S-5000

***Maybe APC E 5.25X4.75 would be in that AMP range but it will not unload same % of AMPs in flight.


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125MPH / 65MPH = 1.923 times the speed of stock F-27C
1.923 X 1.923 X1.923 = 7.1 times the power is needed.
180W (When unloaded at top speed) X 7.1 = 1280W or there about.....don't even think below 1000W for a second on a normal build Stryker even if you think I have way over estimated.
Assume 3.6 volts per cell: 1280/(3.6V X 4S)= 89Awhile at max speed
With 1:1 prop we can take away from some of the possible insane climbing to ensure we start (static)at lower AMPs than otherwise and it would be closer to 89A when at max speed.

89A / 57A = 1.56 times the battery drain = 64% flight duration

You can carry 1.56 times the battery capacity though: 5000 X 1.56 = 7800 mAH
That can be done with (2) 3850 mAH (4S) packs and they could be placed end to end and some of your other hardware can be moved onto the wing.

I’m over estimating?? Sure, go ahead and get (2) 4S-3300 cells in parallel as 4S-6600

You can make 5000 cell work by just running more throttle management/control as compared to what you would on a stock Stryker.
***Basically forget about any pack smaller than 4S-5000….also remember 5S is not an option and 5S-5000 would be way too heavy for your build and motor….besides the prop size being HORRIBLE.

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You did not want to build wooden elevons and wanted stock elevons.

You can run C.F. strip on top & bottom of them…..see the 0.007” stuff that I put in a picture early in this thread.

I just don’t see you flying perfectly level at 125 MPH with (1) C.F. in fuse and modified stock elevons.

I Hope it works out for you.


I find some of your requirements contradictory to my beliefs and what is possible and I’m sorry that I could not solve your needs.

I hope you get what you want and that someone else can give you what you want.

My goal: to make you happy …no matter what.

I will stop here because I cannot help you further…good luck and have fun.

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Folks,


Please chime in and help solve what The1User is looking for,

Thank you all in advance,


Gryphon