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Old Nov 16, 2006, 09:32 AM
Never Trade Luck for Skill
MERLIN V16's Avatar
United States, FL, North Port
Joined Jan 2005
12,905 Posts
Brushed!

Guys
I know it's practically Taboo to speak of brushed Motors but I need your thoughts on this.
GWS recommended and flew the GWS38 on 350 "B" gears with 8/6 props.
I tried the setup on an E-starter and it was a PIG! I went to 350 "C" gears and a 10/8
and it was a different plane. It flew the best it ever did.
I want to power my "38" with 350 "C,s" now ,But what prop for that combo.
Ground clearance is a problem! I wish I could use a 9/7/3.
I have a 2350 Li-Po that fits right into the built in slot so i will use that.
Thanks
Merlin
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Old Nov 16, 2006, 09:33 AM
Hooper, full throttle!
Tommy D's Avatar
USA, NY, East Islip
Joined Feb 2004
11,066 Posts
I purchased my circle cutter at Michael's Art and Crafts here in NY. It's an expensive items so I waited till they had a 50% off any one item sale.

I think it's made by fiskers??

Good Luck

Tommy D
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Old Nov 16, 2006, 09:35 AM
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SW Vermont
Joined May 2002
557 Posts
Quote:
Originally Posted by RAY GWS
I will check what book stores sell Quiet Flyers and post here. Will keep you updated.
And, yes--Quiet Flyer will be running a full review of the GWS-38. I flew the airplane yesterday. Here's one pic from the session:
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Old Nov 16, 2006, 10:57 AM
Unrepentant Carnivore
jamesdr's Avatar
Brandon, Fl
Joined Mar 2005
2,509 Posts
Merlin

There are advantages of a brushed gearbox setup. It will be more effecient and you will save the weight of the extra ESC. A rule of thumb I have heard for going from two to three blade props is "down one/up one". Not sure how a good performing setup on 10/8/2 will work on a 9/7/3. Can you say test bed? Try it on the E-Starter and see how it works.

Jim
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Old Nov 16, 2006, 12:38 PM
AMA 353531
rdeis's Avatar
United States, CO, Colorado Springs
Joined Aug 2003
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In practise I've found a 9x7x3 to be close to a 9.5x7x2 in thrust.

Keep in mind that with a twin you get lots of additional thrust at the same speed- the 8x6 might be just right when there are two of them. I'm probably going to start with 8x6x3 MAS props on mine and move over to 8x6x3 varioprops later.
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Old Nov 16, 2006, 12:40 PM
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rdeis's Avatar
United States, CO, Colorado Springs
Joined Aug 2003
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Quote:
Originally Posted by jamesdr
will be more effecient and you will save the weight of the extra ESC.
And add the weight of two brushed motors!

Efficiency is about picking the right combination to suit your requirements.

The only advantage to brushed is cost-- but that's a significant advantage
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Old Nov 16, 2006, 02:06 PM
CAN WE MAKE IT FLY?????
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Concord,N.C.
Joined Oct 2003
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WOW Balsa,....that's green.....very nice
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Old Nov 16, 2006, 02:24 PM
Seeing the Farside.
Blaze.45's Avatar
Seattle WA, USA
Joined Aug 2005
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Quote:
Originally Posted by rdeis
In practise I've found a 9x7x3 to be close to a 9.5x7x2 in thrust.

Keep in mind that with a twin you get lots of additional thrust at the same speed- the 8x6 might be just right when there are two of them. I'm probably going to start with 8x6x3 MAS props on mine and move over to 8x6x3 varioprops later.
But can vario props utilize the aftermarket spinners like GWS or Dubro?
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Old Nov 16, 2006, 06:37 PM
Never Trade Luck for Skill
MERLIN V16's Avatar
United States, FL, North Port
Joined Jan 2005
12,905 Posts
Quote:
Originally Posted by jamesdr
Merlin

There are advantages of a brushed gearbox setup. It will be more effecient and you will save the weight of the extra ESC. A rule of thumb I have heard for going from two to three blade props is "down one/up one". Not sure how a good performing setup on 10/8/2 will work on a 9/7/3. Can you say test bed? Try it on the E-Starter and see how it works.

Jim
I tested it on a GWS Corsair and it flew well on 350 "C" 9/7/3,but it was a new prop every landing
I'm hoping it flies twice as well on the GWS 38.
My 38 has gear as my new club has a 50 X 300 Paved runway
Thanks Jim
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Old Nov 16, 2006, 06:40 PM
Never Trade Luck for Skill
MERLIN V16's Avatar
United States, FL, North Port
Joined Jan 2005
12,905 Posts
Quote:
Originally Posted by rdeis
In practise I've found a 9x7x3 to be close to a 9.5x7x2 in thrust.

Keep in mind that with a twin you get lots of additional thrust at the same speed- the 8x6 might be just right when there are two of them. I'm probably going to start with 8x6x3 MAS props on mine and move over to 8x6x3 varioprops later.
Thanks Rdeis
I will test the 8/6/2 as well. I will wait to see how you make out with the MAS Props.
Merlin
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Old Nov 16, 2006, 06:49 PM
Lori, hey, you're home early
CarreraGTSCS's Avatar
United States, NJ, Trenton
Joined Jan 2004
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Quote:
Originally Posted by MERLIN V16
I tested it on a GWS Corsair and it flew well on 350 "C" 9/7/3,but it was a new prop every landing
I'm hoping it flies twice as well on the GWS 38.
My 38 has gear as my new club has a 50 X 300 Paved runway
Thanks Jim

Jim-- Is this on 2s or 3s?

Thanks,
Mike
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Old Nov 16, 2006, 06:57 PM
AMA 353531
rdeis's Avatar
United States, CO, Colorado Springs
Joined Aug 2003
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Quote:
Originally Posted by Blaze.45
But can vario props utilize the aftermarket spinners like GWS or Dubro?
I'll have to see- I expect so. Depends on how the backplate attaches.
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Old Nov 16, 2006, 07:35 PM
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Joined Jul 2004
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Share some info with you all.

I got some info from Model Aviation, Michael Ramsey. "I have a number of flights on the GWS38. In a word "Excellent", very predictable and smooth. We'll be taking flight shots next week. I'll share those with you then."

If he agree to share, will post here also.

It tooks him 10 days to work on his GWS-38 .
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Old Nov 16, 2006, 07:38 PM
Never Trade Luck for Skill
MERLIN V16's Avatar
United States, FL, North Port
Joined Jan 2005
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Quote:
Originally Posted by CarreraGTSCS
Jim-- Is this on 2s or 3s?

Thanks,
Mike
2-S

John
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Old Nov 16, 2006, 08:36 PM
Lori, hey, you're home early
CarreraGTSCS's Avatar
United States, NJ, Trenton
Joined Jan 2004
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Peachy. Just wanted to be sure before I burned up some motors
Thanks,
Mike
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