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Oct 18, 2012, 12:54 PM
Ken's CAD Models
dz1sfb's Avatar
Thread OP
I am thinking about swapping out these 7.5g servos for some 3.6g units. I could drop another 7.8g by the numbers reducing the AUW to 82g (2.89 oz.) and up the thrust to weight ratio to 1.51:1. Then my watts per lb would be 123.

Ken
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Oct 18, 2012, 04:55 PM
For us He died, in me He lives
Jimmy JFlyer's Avatar
Nice Ken!
I know my hxt 1811 2000 on 2s would hover my J-Bug effortlessly and that one weighed in at 99 grams before repairs.
Tho that was on a 6x3. You should try it. 7x3.5 would be nutty.
This is really poking at my build bug.
I love little guys on this power set up.
Oct 19, 2012, 07:50 PM
Registered User
XDmToter's Avatar
Hey Ken. I've got one of these C10 Micro 8 gram 2900kv motors and some GWS 4x4 props.
https://www.hobbyking.com/hobbyking/s...idProduct=6584
Do you think that will be underpowered for the Mini?
Oct 19, 2012, 08:21 PM
RC Adddict
Wilfor's Avatar
Quote:
Originally Posted by XDmToter
Hey Ken. I've got one of these C10 Micro 8 gram 2900kv motors and some GWS 4x4 props.
https://www.hobbyking.com/hobbyking/s...idProduct=6584
Do you think that will be underpowered for the Mini?
Reported thrust for this setup is 4oz on the HK site . This would fly great with that setup . Not as easy to hover as kens but well you know ....
Oct 19, 2012, 08:37 PM
Registered User
XDmToter's Avatar
Quote:
Originally Posted by Wilfor
Reported thrust for this setup is 4oz on the HK site . This would fly great with that setup . Not as easy to hover as kens but well you know ....
Thanks Wilfor. I'll give it a go and see what happens.
Oct 21, 2012, 10:36 AM
Ken's CAD Models
dz1sfb's Avatar
Thread OP

Mini StingRay #1 Gets Some Color


Paint job for #1.

Ken
Last edited by dz1sfb; Oct 22, 2012 at 04:17 AM. Reason: Added graphics files
Oct 21, 2012, 11:58 AM
Ken's CAD Models
dz1sfb's Avatar
Thread OP
Did a static duration test last night. Running the 10g motor WOT with a 5x3 prop and the Turnigy 300 mAh 2s yielded 6 min. 45 sec. to LVC.

Ken
Last edited by dz1sfb; Oct 22, 2012 at 08:38 AM.
Oct 21, 2012, 04:48 PM
four candles
is this 3mm or 6mm depron..?
Oct 21, 2012, 05:24 PM
RC Adddict
Wilfor's Avatar
6mm Model Plane Foam which you wont find over there ..ModelPlaneFoam.com
Oct 21, 2012, 09:20 PM
AKA Don
Quote:
Originally Posted by XDmToter
Hey Ken. I've got one of these C10 Micro 8 gram 2900kv motors and some GWS 4x4 props.
https://www.hobbyking.com/hobbyking/s...idProduct=6584
Do you think that will be underpowered for the Mini?

I just completed my first miniSR. AUW 96 g. thats with a 26g Nano tech 370 2S battery. It's powered by a C10 2100 Kv motor spinning a 6X3 GWS. It pulls less than 3A WOT. Feels weak in my hand, but then I'm not used to 3.2 Oz. models. I built in 3.7g servos and 6A ESC. I'll post some pictures and a flight test as soon as I get a chance. I will have a chance to do some indoor combat testing Tuesday afternoon.

I am thinking if we keep the AUW below 4 oz. collision damage should be minimal. Certianly way less than we are currently experiencing in our out door combat sessions with full sized StingRays.
Last edited by bz1mcr; Oct 21, 2012 at 09:28 PM.
Oct 22, 2012, 01:14 AM
four candles
Quote:
Originally Posted by Wilfor
6mm Model Plane Foam which you wont find over there ..ModelPlaneFoam.com
How does that differ from 6mm depron..?
Oct 22, 2012, 04:07 AM
Ken's CAD Models
dz1sfb's Avatar
Thread OP
Quote:
Originally Posted by Kickstart
How does that differ from 6mm depron..?
Less crunchy, lighter, and less than half the price.

Ken
Oct 22, 2012, 04:12 AM
Ken's CAD Models
dz1sfb's Avatar
Thread OP

Mini StingRay Graphics


I have been impressed with putting some interesting motifs together from the animal kingdom, and wanted to see what you thought.

I am going to use the Blue Spotted Stingray graphics for my second one.

Ken

Oct 22, 2012, 08:10 AM
AKA Don
Quote:
Originally Posted by Kickstart
How does that differ from 6mm depron..?
It's BETTER! Read about it here https://www.rcgroups.com/forums/show....php?t=1533245
Oct 22, 2012, 11:25 AM
Ken's CAD Models
dz1sfb's Avatar
Thread OP

#2 Mini StingRay Paint


Got #2 done today. Just have to retape the LE and hinge lines. I really like how this one looks as well. I have not fussed about paint overage in a couple of places knowing that this will likely get beat up.

Added a ring of darker blue enhances the appearance dramatically. Used these round sponge painters on a stick from Walmart. For the outside of the spots, I pulled the foam out of the center to just paint the edge.

Ken
Last edited by dz1sfb; Oct 22, 2012 at 11:31 AM.


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