Originally Posted by GP73

Right, just drill the hole bigger for the pre-bent struts, correct?

I missinterptreted: I thought you were swapping a trunion from a dead 15-25 unit, into a diss-used 10-15 body.

If you are going to drill out a 10-15 unit, you will need to drill both the plastic trunion AND the metal axle piece; but I caution you that both need to be true interference fit with the 15-25 strut wire, any oversize will manifest as lateral 'wobble' in the strut.

Do not attempt to drill the platsic trunion and metal axle 'one within the other', else the frictional heat arsing when drilling through the metal, will melt the plastic trunion.

I believe the 15-25 strut gauge is 3.5 mm.

nevermind

Originally Posted by Babadush

I was messing with ecalc and decided to put in the Hurri's data with motor. Is this accurate with a 3s battery? 11min full power and 18min mixed flight time? That seems like an unusual amount to me. I asked my buddy but he flies on 4s so he couldn't comment. I posted a screen shot. Is the information I entered correct?

Hi Bddsh,

You might try re-entering data and re-hitting the "calculate" button again.
.... the performance prediction fields only then update themselves.

I suspect your screen capture image was pre-update.

I would anticipate predicted mixed-flight times of only half that on a 3300 mAh pack ... still well plenty though.

Originally Posted by Plane Chaos

Hi Bddsh,

You might try re-entering data and re-hitting the "calculate" button again.
.... the performance prediction fields only then update themselves.

I suspect your screen capture image was pre-update.

I would anticipate predicted mixed-flight times of only half that on a 3300 mAh pack ... still well plenty though.

I accidentally entered .26 ohms instead of .026 it made a huge difference haha. I was baffled.

Well, at this price I've crumbled and ordered from Austria..

No idea how I'm going to explain this one to the Boss??

Is this the best thread for "cheaper" retracts and detailing information? I've searched the attachments and seen some info. I just wondered if there was a build and modification thread somewhere I can't find?? I think an open canopy with some extra detail inside might be called for...

Any tips and pointers would be much appreciated.

Chocks away Ginger

I'm thinking of getting some 4000mAh batteries for this one, 30C or above??

Can someone advise what the max size I can go to with the battery tray in this plane, as the choice in battery size is HUGE

Also HH advise a 3200 30C in their blurb, is there any danger in going for a higher rated C rating?? I've seen 35-90C ranges stated in some sites, and am a bit confused. I know the higher C rating gives you a bit more ooomph at WOT.... well that's what I've been told

Any advice appreciated...

Originally Posted by GP73

Right, just drill the hole bigger for the pre-bent struts, correct?

Grind down the fat strut with a dremal. I'm having the same issue. If you drill it wrong your retract is toast. If you mess up grinding the strut you will still have the original that came with the retracts. Which you can then put in a vice and bend to get a 90 degree angle.

Originally Posted by Pjuran

Grind down the fat strut with a dremal. I'm having the same issue. If you drill it wrong your retract is toast. If you mess up grinding the strut you will still have the original that came with the retracts. Which you can then put in a vice and bend to get a 90 degree angle.

Good idea, but wouldn't that weaken the strut?

BTW the trunnions can be replaced as well, I actually think I have a couple of metal ones that fit the E-Flite retracts, I also have a couple of ChangeSun retracts that are drop-in replacement for the E-flite 10-15 (the purple ones from HK). Plus some PingZheng retracts as well.

I'm a "retracts aficionado"....

Originally Posted by GP73

Good idea, but wouldn't that weaken the strut?

BTW the trunnions can be replaced as well, I actually think I have a couple of metal ones that fit the E-Flite retracts, I also have a couple of ChangeSun retracts that are drop-in replacement for the E-flite 10-15 (the purple ones from HK). Plus some PZ retracts as well.

I'm a "retracts aficionado"....

Wait. We pay 90 dollars for retracts and they have plastic trunnions?

Originally Posted by Babadush

Wait. We pay 90 dollars for retracts and they have plastic trunnions?

Isn't that what Plane Chaos said earlier?

I can double check once I get home, but as far as I remember they do have a plastic trunnion.

These are the drop-in replacement with metal trunnion:

http://www.x-flight.com.hk/index.php...&more=&lang=en

You can find a picture of the measurements on this page:

http://www.x-flight.com.hk/index.php...&more=&lang=en

Thanks I'm doing that and selling the other ones. I didn't know or see someone say they had plastic trunnions until you mentioned it.

Originally Posted by Babadush

Thanks I'm doing that and selling the other ones. I didn't know or see someone say they had plastic trunnions until you mentioned it.

In my experience, the plastic trunions in the E-Flite retracts are fine; altogether very relaible units.

... I have 4 E-flite sets deployed across various birds.

Originally Posted by GP73

Good idea, but wouldn't that weaken the strut?

BTW the trunnions can be replaced as well, I actually think I have a couple of metal ones that fit the E-Flite retracts, I also have a couple of ChangeSun retracts that are drop-in replacement for the E-flite 10-15 (the purple ones from HK). Plus some PingZheng retracts as well.

I'm a "retracts aficionado"....

I don't think it will weaken them at all. You're not taking off that much material. Plus if you need to replace the pre bents its less than $10. I rather mess up the struts than drill holes and wreck a retract any day. :-)

A higher C-rating will do no harm; the load arising is largely defined by the voltage.

A higer C-rated pack generally behaves with a lower 'internal resistance', thus allows a few percent more amps if all else is the same.

In my view the stock 3200 mAh pack is plenty for this bird.

Will a 20c battery be okay? I have a couple 30c batteries laying around but also a 5000mah 20c I wouldn't mind using for longer flight times.