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What folding prop

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James Humphreys 124/09/2020 11:12:36
28 forum posts
11 photos

OK so I'm strugling to find out what folding prop I need

The model is a hollein introduction glider 2.860 wing & 920g flying weight

I've got a overlander tornado thumper 2826/09 motor

With a 30a esc with Bec and a 1300mah 11.1 3s battery

These aren't the recommended gear but what I was told in shop would be OK.

Also the motor has a 3mm shaft would a 3.2mm or a 3.1mm be too big to clamp down ??

Cheers

PatMc24/09/2020 12:31:10
avatar
4482 forum posts
548 photos

I'm afraid you've had bad advice on the motor. The KV is too high, meaning it would be limited to using a prop too small for a decent climb rate with this model. IMO a heavier motor with smaller (lighter} 3s lipo would be a more suitable combo.
I suggest you read this thread on the Inside F5J & go for a similar power train to one of those.

I intend using one of these Keda motors with a 3s 900 mAH lipo when I build the Introduction. My Amigo 2 glider is powered by the 1050kv version of the same Keda motor driving a 9x5 prop. I could use a larger dia prop for faster climb rate but as the Amigo is a vintage glider I'm satisfied with the slower but still fairly brisk climb rate.

A 3.1mm/3.2mm can't be used with a 3mm shaft.

 

Edited By PatMc on 24/09/2020 12:32:13

Shaun Walsh24/09/2020 13:04:38
443 forum posts
50 photos
Posted by PatMc on 24/09/2020 12:31:10:

I'm afraid you've had bad advice on the motor. The KV is too high, meaning it would be limited to using a prop too small for a decent climb rate with this model. IMO a heavier motor with smaller (lighter} 3s lipo would be a more suitable combo.
I suggest you read this thread on the Inside F5J & go for a similar power train to one of those.

I intend using one of these Keda motors with a 3s 900 mAH lipo when I build the Introduction. My Amigo 2 glider is powered by the 1050kv version of the same Keda motor driving a 9x5 prop. I could use a larger dia prop for faster climb rate but as the Amigo is a vintage glider I'm satisfied with the slower but still fairly brisk climb rate.

A 3.1mm/3.2mm can't be used with a 3mm shaft.

Edited By PatMc on 24/09/2020 12:32:13

Completely agree, the KV is far too high.

Personally I would be looking for a motor in the 1000 to 1250 Kv range producing 250 to 300 watts on a 3s battery. You will need to know the max diameter that will fit in the fuselage, my guess is a 2826 or 2834 might fit.

Once you have your motor sorted, choose the correct spinner/yoke/prop blade configuration from the Aeronaut range.

Hyperflight recommend the following power systems for this glider.

Powertrain Recommendations
Axi 2217/16 V2 Long 2S 900mAh LiPo, 12x6 or 12x7
Axi 2217/16 V2 Long 3S 900mAh LiPo, 10x6 or 10x7
Hacker A20-22L 3S 900mAh LiPo, 11x6
Hacker A20-20L 3S 900mAh LiPo, 10x7
Dualsky XM2826EA-10 45g outrunner 2S 900mAh LiPo, 10x7
Turnigy C2826-1350 3S 900mAh LiPo, 9x4.5
Mega 16/15/4 2S 900mAh LiPo, 8x4
Mega 16/15/5 3S 900mAh LiPo, 7x5
James Humphreys 124/09/2020 14:45:30
28 forum posts
11 photos

Ok cheers guys looks like I was had by the model shop first time going in as its almost 80mile round trip.oh well they weren't too expensive. I've ordered the hacker motor and supporting items.cheers for the info (total minefield) 😂

kc24/09/2020 16:24:20
6730 forum posts
174 photos

A 3.175 prop adaptor might seem as though it clamps onto a 3mm shaft but it won't hold and will not stop the prop flying off dangerously.

Lets hope the motor ordered has a shaft that suits the prop adaptor.

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