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Sep 24, 2011, 11:31 AM
Air Cooled VW mechanic
THX-181's Avatar
Quote:
Originally Posted by bonnie9496
Was shocked to find the motor has a 13mm bolt pattern at both ends. The paperwork says 19mm Looks like a CNC motor mount won't fit....or am I missing something?
You are indeed missing something.
You're simply measuring the pattern the wrong way.
Hold the motor so the pattern makes a "+" then measure hole to hole horizontally.
You see that 13 turn in to a 19.

Does that make sense?

Eric
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Sep 24, 2011, 11:27 PM
Fighting Gravity
bonnie9496's Avatar
Quote:
Originally Posted by THX-181
You are indeed missing something.
You're simply measuring the pattern the wrong way.
Hold the motor so the pattern makes a "+" then measure hole to hole horizontally.
You see that 13 turn in to a 19.

Does that make sense?

Eric
Thanks....Ok....I'm dumb
Sep 25, 2011, 07:38 AM
Registered User
I have two of these with exactly the same setups. Initally I had an eflite power 10 motor, 40a eflite esc, and a 2200mah 3s Blue lipo on an 11x5.5 prop. It flew well but was always tail heavy. My buddy brought his out with a neodym 10 motor (cermark) and I couldn't keep up. The heavier motor also solved the cg issue. My current setup on both planes.....neodym 10, hyperion 45a esc, 3s 2200mah Blue lipo batteries, 12x6prop. Will go straight up out of sight or hover at half throttle....If you are good, very short coupled airplane.
Sep 28, 2011, 08:35 PM
PSALM 14:1
Sammy70's Avatar
Anyone have one of these Gemini kits NIB they want to sell me before I order one?


PM me if so....
Oct 01, 2011, 08:01 AM
Registered User
morrigan's Avatar
Hi,

this morning at 07:30h i (re)maidend a used gemini from my friend.
KDS 40A ESC, Hobbyking 1000KV motor, 11 x 5,5 APC Style Propeller, Zippy 2200 mah batterie.
300 Watt, 26,5 Amp at fresh battery....

After trimming everything went fine. Nice to fly. a little bit different with the biplane, but ok.

Vertical is no problem. motor is quiet and strong enough.
Aber 6 min of flying had a bit more than 50% battery (mixed flying).

We have brilliant weather today, the next hour i start do fly it again.

I think it could be faster, but it is ok. When we are used to it, maybe a 1250 kv motor find it way


bernd
Oct 01, 2011, 05:24 PM
Fighting Gravity
bonnie9496's Avatar
Quote:
Originally Posted by morrigan
Hi,

this morning at 07:30h i (re)maidend a used gemini from my friend.
KDS 40A ESC, Hobbyking 1000KV motor, 11 x 5,5 APC Style Propeller, Zippy 2200 mah batterie.
300 Watt, 26,5 Amp at fresh battery....

After trimming everything went fine. Nice to fly. a little bit different with the biplane, but ok.

Vertical is no problem. motor is quiet and strong enough.
Aber 6 min of flying had a bit more than 50% battery (mixed flying).

We have brilliant weather today, the next hour i start do fly it again.

I think it could be faster, but it is ok. When we are used to it, maybe a 1250 kv motor find it way


bernd
Congratulaition on the re-maiden.

I am using a Turnigy 3632 1200Kv. At static with a APC 11x5.5 numbers were:
365Watts and 32 Amps. Plenty of power!
Changed prop to 12x3.8 and it was pulling 490w at 47amps. A bit high for my 40Amp ESC!
Oct 02, 2011, 12:06 PM
Registered User
morrigan's Avatar
Hi,

used a new Turnigy 2200mah 40C this day...

340 Watt, 29,5 A

A bit older 2200mah 30C had the

300 Watt, 26,5 Amp

You can feel the difference with the batteries...


This setup is ok for my friend at the moment. When he is used to the plane we might change to a turnigy 4235 1250 KV.
I had this motor in my funcub. But the 4 mm shaft was too weak for the FC...

I fly the plane 4 more times this day. Nice to fly. Bit different to my favorite Plane at the moment (PZ Extra 300).

Low bypass look beautifull with the biplane


Bernd
Oct 02, 2011, 10:37 PM
Fill'er Up!
mattyhawk's Avatar
Quote:
Originally Posted by morrigan
Hi,

this morning at 07:30h i (re)maidend a used gemini from my friend.
KDS 40A ESC, Hobbyking 1000KV motor, 11 x 5,5 APC Style Propeller, Zippy 2200 mah batterie.
300 Watt, 26,5 Amp at fresh battery....

After trimming everything went fine. Nice to fly. a little bit different with the biplane, but ok.

Vertical is no problem. motor is quiet and strong enough.
Aber 6 min of flying had a bit more than 50% battery (mixed flying).

We have brilliant weather today, the next hour i start do fly it again.

I think it could be faster, but it is ok. When we are used to it, maybe a 1250 kv motor find it way


bernd
Congratulations! Glad the flight went well for you.

Quote:
Originally Posted by morrigan
Hi,

used a new Turnigy 2200mah 40C this day...

340 Watt, 29,5 A

A bit older 2200mah 30C had the

300 Watt, 26,5 Amp

You can feel the difference with the batteries...


This setup is ok for my friend at the moment. When he is used to the plane we might change to a turnigy 4235 1250 KV.
I had this motor in my funcub. But the 4 mm shaft was too weak for the FC...

I fly the plane 4 more times this day. Nice to fly. Bit different to my favorite Plane at the moment (PZ Extra 300).

Low bypass look beautifull with the biplane


Bernd
Yeah, 29 amps is moderate power, could use more if you want unlimited vertical. I suggest you do not use the 4235. That is way too large of a can and too heavy. Try to keep it below a 3542 if you can, more preferred in the 3536 or 3632 (like bonnie9496) range. It will keep the weight low and it wil float around the sky.
Oct 03, 2011, 03:11 PM
Registered User
morrigan's Avatar
thx for Tip !!!

The next few weeks we will fly with the 1000kv....

And then we look for a new motor and hope HK is back in stock.
At the moment most of my favoite Motors out of Stock...

Didnīt you have problems with 4 mm Shaft on the Geminie?

Bernd
Oct 03, 2011, 04:12 PM
Fill'er Up!
mattyhawk's Avatar
Quote:
Originally Posted by morrigan
thx for Tip !!!

The next few weeks we will fly with the 1000kv....

And then we look for a new motor and hope HK is back in stock.
At the moment most of my favoite Motors out of Stock...

Didnīt you have problems with 4 mm Shaft on the Geminie?

Bernd
Nope, no issue with the 4mm, in fact, I had a nose in on saturday doing some stupid low altitude snap rolls incorrectly and broke the 4mm motor shaft. I hate making new motor shafts for doing dumb thumbs.
Oct 04, 2011, 09:27 AM
How close are those trees?
Goody63's Avatar
Quote:
Originally Posted by morrigan
thx for Tip !!!

The next few weeks we will fly with the 1000kv....

And then we look for a new motor and hope HK is back in stock.
At the moment most of my favoite Motors out of Stock...

Didnīt you have problems with 4 mm Shaft on the Geminie?

Bernd
I've already broken the 4mm shaft on my NTM 35-36 1400kv motor. I accidentally hit the throttle stick with my neck strap and the Gemini took off on auto pilot before a prop strike and snapped shaft.

Its been replaced with one of these Blue Devil motors.

Certainly a much more sensible setup than the previous 700w NTM and a 5mm shaft too!
Oct 04, 2011, 09:40 AM
Fill'er Up!
mattyhawk's Avatar
Quote:
Originally Posted by Goody63
I've already broken the 4mm shaft on my NTM 35-36 1400kv motor. I accidentally hit the throttle stick with my neck strap and the Gemini took off on auto pilot before a prop strike and snapped shaft.

Its been replaced with one of these Blue Devil motors.

Certainly a much more sensible setup than the previous 700w NTM and a 5mm shaft too!
I was reading those NTM motors are a fine motor, but the shafts are ultra weak, is this what you have experienced?
Oct 04, 2011, 05:39 PM
How close are those trees?
Goody63's Avatar
Quote:
Originally Posted by mattyhawk
I was reading those NTM motors are a fine motor, but the shafts are ultra weak, is this what you have experienced?
I didn't think the prop strike was that bad and I was a little surprised when it broke.

Apart from that though they do appear to reliably pump out the watts. I've got a 35-36 1800KV in a MP Blizzard and a 35-42 1000KV in a Ceremark Fantasy Racer.

What was really disappointing though was that I couldn't ind a replacement shaft for the NTM in the Gemini.
Oct 05, 2011, 12:19 AM
Registered User
morrigan's Avatar
Hi,

i am using a turnigy 42-35 1250KV in my Multiplex Funcub. Having all the time problems with bend shafts. Noisy, virbrations....

That was the reason i change to a 5 mm shaft.

I think 4 mm shafts are to weak for that power.

Maybe it is better in the Gemini than in the Funcub..

Bernd
Oct 05, 2011, 01:07 AM
Fill'er Up!
mattyhawk's Avatar
Quote:
Originally Posted by morrigan
Hi,

i am using a turnigy 42-35 1250KV in my Multiplex Funcub. Having all the time problems with bend shafts. Noisy, virbrations....

That was the reason i change to a 5 mm shaft.

I think 4 mm shafts are to weak for that power.

Maybe it is better in the Gemini than in the Funcub..

Bernd
The vibrations on the Gemini with big powerful motor is a well documented issue on the forums here. The solution is to run an aluminum motor mount on the gemini. An aluminum mount may work well with the fun cub too. My father in law has a FC and he also has the aluminum motor mount on it. He has zero vibration and motor stays cool.


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