NEU 1110 with 1509 5.2 gear need help with prop

FASTBEN · Nov 04, 2009, 10:15 AM

hi all,well i'm going to throw this out there see what i'll get from you all.
i have purchased plane and rich had moded a 1110 and mated an 1509 5.2 gear box to this motor on 4s first i have to tell you that this motor now has some crazy power.
i am using a 13x7 on cc80 g3 4s 2200,the plane is crazy fast but i can feel there is very hi rpm and also feel there is much more this motor can provide,maybe the prop is not a right one,at 1000watts the plane with all the gear 1330g,it is a 1.5m fredy
ben

John Lueke · Nov 04, 2009, 12:15 PM

Which wind? I have a 1.5Y(3250 Kv) with the same gbox in my Bandit.

la528it · Nov 04, 2009, 12:50 PM

It's a 1y wind

FASTBEN · Nov 04, 2009, 02:21 PM

thanks rich.
ben

FASTBEN · Nov 04, 2009, 02:44 PM

Quote:

Originally Posted by John Lueke

Which wind? I have a 1.5Y(3250 Kv) with the same gbox in my Bandit.

what prop are you using.
ben

John Lueke · Nov 04, 2009, 08:55 PM

15x13

FASTBEN · Nov 04, 2009, 09:15 PM

john what kinda amp draw and what esc are you using.?
ben

ChickenStick · Nov 05, 2009, 09:15 AM

Quote:

Originally Posted by FASTBEN

I am using a 13x7 on cc80 g3 4s 2200,the plane is crazy fast but i can feel there is very hi rpm and also feel there is much more this motor can provide,maybe the prop is not a right one,at 1000watts the plane with all the gear 1330g,it is a 1.5m fredy
ben

Here's my 2 cents...

Props below 65% P/D ratio are for electric sailplanes only (not hotliners).
13x7 = 54%
Bottom line is your pitch speed is about 63 mph.
If you hit the power when the plane is doing 70+ you will get zilch.
Too low pitch speed for the Freddy

My guess is that you are just over 1000 watts and about 87 amps.
Seems like a good range for that motor, so holding about the same...

13x7 = 87 amps / 130 oz thrust / 63 mph / 85% eff / 49K rpm
12.5x9 = 92amps / 114 oz thrust / 78 mph / 83% eff / 47K rpm
12x10 = 89 amps / 102 oz thrust / 89 mph / 84% eff / 49K rpm

Depending how you like to fly (thrust vs. speed), with either the 12.5x9 or the 12x10, I think that you will find a noticable performance improvement.
And the motor rpm's are right where you want for sport flying (safely below the 60K limit).

- Cliff

la528it · Nov 05, 2009, 10:24 AM

12.75*13 is as far as I would go on that setup. It runs, but it get's hot; you would have to limit your bursts carefully.

I think the 13x7 is the place to start, get comfortable with launching flying this plane, etc. When you are ready, prop up, Cliff's comments are (as usual) DEAD on

FASTBEN · Nov 05, 2009, 10:43 AM

12x10 it is will order 1 and try.
ben
just checked
i have
12.5x9 aeronut cam
falco 14x8.5
falco 14x10
i think i'll try the 12.5x9 till 12x10 gets in,,,what do you think of that prop for now?

ChickenStick · Nov 05, 2009, 03:16 PM

You tell us...

But, based on the weight of the plane, it should pull plenty hard, and have the additional 15 mph of pitch speed.

Launches should remain a non-event with the 12.5x9.

- Cliff

PS - Don't try the 14 inch'ers on that set-up.
Even a 13x10 or 13x11 would be pushing the limits pretty hard.

John Lueke · Nov 05, 2009, 03:59 PM

I am drawing about 70 amps. The lower Kv on the 1.5Y compared to your motor lets me use a bigger prop. I don't run it for more than about 10 sec bursta, but I could probably run it longer. My speed control is a Suppo 100 amp model from Lightflight RC. It has worked fine so far.

FASTBEN · Nov 05, 2009, 05:18 PM

Quote:

Originally Posted by ChickenStick

You tell us...

But, based on the weight of the plane, it should pull plenty hard, and have the additional 15 mph of pitch speed.

Launches should remain a non-event with the 12.5x9.

- Cliff

PS - Don't try the 14 inch'ers on that set-up.
Even a 13x10 or 13x11 would be pushing the limits pretty hard.

will try my 12.5x9 this weekend and report back.like to try the 12x10 also and see how much the speed changes.thanks Cliff for all the info.
ben

jjmouris · Nov 07, 2009, 05:04 AM

Rudy makes a nice 13x9 and a 13x10.5 also. Those are so nice in their design, i just made a mould of a single remaining blade of 13x9 for prosperaty.

The length of the blades vs the cord is just right. They are NOT to wide like all the big wide props (17x18 and so on) that Rudy makes but they are also not to narrow like the 14.5x14 and 16x17slim. These are just perfect.

These are the prop sizes you should be trying. Forget about anything else!

http://shop.modellbau-freudenthaler....rfm%208130.jpg

GeorgiMirov · Nov 09, 2009, 04:37 PM

Joe tomorrow I will finish the mold of the new GM 17x20-21,5" prop.
Will post pictures soon.The idea is to use the 5 and 7 degrees RFM spinners.
Designed by my father who is an World champ in tethered hydroplanes and has a lot of knowledges about props.

Performance graph will follow also.

Regards

Nov 04, 2009, 10:15 AM	#1
FASTBEN fast,,,, faster Join Date: Feb 2002 Location: KELLER TEXAS Posts: 2,643	NEU 1110 with 1509 5.2 gear need help with prop hi all,well i'm going to throw this out there see what i'll get from you all. i have purchased plane and rich had moded a 1110 and mated an 1509 5.2 gear box to this motor on 4s first i have to tell you that this motor now has some crazy power. i am using a 13x7 on cc80 g3 4s 2200,the plane is crazy fast but i can feel there is very hi rpm and also feel there is much more this motor can provide,maybe the prop is not a right one,at 1000watts the plane with all the gear 1330g,it is a 1.5m fredy ben

Nov 05, 2009, 10:43 AM	#10
FASTBEN fast,,,, faster Join Date: Feb 2002 Location: KELLER TEXAS Posts: 2,643	12x10 it is will order 1 and try. ben just checked i have 12.5x9 aeronut cam falco 14x8.5 falco 14x10 i think i'll try the 12.5x9 till 12x10 gets in,,,what do you think of that prop for now? Last edited by FASTBEN; Nov 05, 2009 at 11:14 AM.

Nov 05, 2009, 03:16 PM	#11
ChickenStick The sky is falling! Join Date: Nov 2005 Location: Cleveland, Ohio Posts: 552	You tell us... But, based on the weight of the plane, it should pull plenty hard, and have the additional 15 mph of pitch speed. Launches should remain a non-event with the 12.5x9. - Cliff PS - Don't try the 14 inch'ers on that set-up. Even a 13x10 or 13x11 would be pushing the limits pretty hard. Last edited by ChickenStick; Nov 05, 2009 at 03:22 PM.

Nov 09, 2009, 04:37 PM	#15
GeorgiMirov GeorgiMirov Join Date: Feb 2007 Location: Varna , Bulgaria Posts: 296	Joe tomorrow I will finish the mold of the new GM 17x20-21,5" prop. Will post pictures soon.The idea is to use the 5 and 7 degrees RFM spinners. Designed by my father who is an World champ in tethered hydroplanes and has a lot of knowledges about props. Performance graph will follow also. Regards Last edited by GeorgiMirov; Nov 09, 2009 at 04:43 PM.

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Nov 04, 2009, 12:15 PM	#2
John Lueke Registered User Join Date: Dec 2003 Location: Miamisburg OH Posts: 248	Which wind? I have a 1.5Y(3250 Kv) with the same gbox in my Bandit.

Nov 04, 2009, 12:50 PM	#3
la528it Registered User Join Date: Dec 2007 Location: City of Angels Posts: 803	It's a 1y wind

Nov 04, 2009, 02:21 PM	#4
FASTBEN fast,,,, faster Join Date: Feb 2002 Location: KELLER TEXAS Posts: 2,643	thanks rich. ben

Nov 04, 2009, 08:55 PM	#6
John Lueke Registered User Join Date: Dec 2003 Location: Miamisburg OH Posts: 248	15x13

Nov 04, 2009, 09:15 PM	#7
FASTBEN fast,,,, faster Join Date: Feb 2002 Location: KELLER TEXAS Posts: 2,643	john what kinda amp draw and what esc are you using.? ben

Nov 05, 2009, 10:24 AM	#9
la528it Registered User Join Date: Dec 2007 Location: City of Angels Posts: 803	12.75*13 is as far as I would go on that setup. It runs, but it get's hot; you would have to limit your bursts carefully. I think the 13x7 is the place to start, get comfortable with launching flying this plane, etc. When you are ready, prop up, Cliff's comments are (as usual) DEAD on

Nov 05, 2009, 03:59 PM	#12
John Lueke Registered User Join Date: Dec 2003 Location: Miamisburg OH Posts: 248	I am drawing about 70 amps. The lower Kv on the 1.5Y compared to your motor lets me use a bigger prop. I don't run it for more than about 10 sec bursta, but I could probably run it longer. My speed control is a Suppo 100 amp model from Lightflight RC. It has worked fine so far.

Nov 07, 2009, 05:04 AM	#14
jjmouris High Performance Join Date: Aug 2008 Location: Southampton, UK Posts: 2,522	Rudy makes a nice 13x9 and a 13x10.5 also. Those are so nice in their design, i just made a mould of a single remaining blade of 13x9 for prosperaty. The length of the blades vs the cord is just right. They are NOT to wide like all the big wide props (17x18 and so on) that Rudy makes but they are also not to narrow like the 14.5x14 and 16x17slim. These are just perfect. These are the prop sizes you should be trying. Forget about anything else! http://shop.modellbau-freudenthaler....rfm%208130.jpg