HobbyKing.com New Products Flash Sale
Reply
Thread Tools
This thread is privately moderated by RAY GWS, who may elect to delete unwanted replies.
Old Jan 14, 2010, 12:41 AM
Registered User
Ipoh, Perak Malaysia
Joined Jul 2006
4,005 Posts
Quote:
Originally Posted by woodsy View Post
Quote:
Please note

A Clockwise (CW) propeller spins Clockwise as viewed from the pilots seat, this is the 'normal' prop on an RC aircraft

A Counter Clockwise or Counter Rotating propeller (CCW or CR) spins Counter (Anti) Clockwise as viewed from the pilots seat

Multi engine planes are normally set up with the LEFT side props spinning clockwise and the RIGHT side props spinning Anti clockwise as viewed from the pilot seat

From earlier in the thread, I think it was mention by someone that the direction of rotation is just the opposite to what you mentioned. Something about throwing mud onto the cockpit windshield...

chewy
chewytm is offline Find More Posts by chewytm
Reply With Quote
Sign up now
to remove ads between posts
Old Jan 14, 2010, 11:35 AM
On the Edge of Space
dLdV's Avatar
Exit 4, South Jersey, USA
Joined Dec 2007
1,446 Posts
Quote:
Originally Posted by kensp View Post
Strange, but only one of the propeller driven multi-engined aircraft I have worked on or seen in service have had propellers that only rotated in more than one direction. This was the Avro Shackleton which had two separate propellers, that rotated in opposite directions, mounted on each engine.

As well 95% of the multi-engined aircraft that are featured in "American Aircraft of World War II", a book that details all the aircraft that were produced in volume for the US Armed Forces during WWII, have propellers that rotate in only one direction.

Ken
Did the full scale P-38 counter rotate? Did you opt for counter rotate on your model?
dLdV is offline Find More Posts by dLdV
Reply With Quote
Old Jan 14, 2010, 11:38 AM
Suspended Account
Joined Sep 2009
4,831 Posts
Yes.
angelfood is offline Find More Posts by angelfood
Reply With Quote  (Disabled)
Old Jan 14, 2010, 11:48 AM
Suspended Account
ni'ihau
Joined Nov 2003
3,241 Posts
The opposite rotation of the left and right motors on a P-38 are sort of unique to that plane, and to Kelly Johnson's genius.

Ask Yamamoto if he thought it was a good idea.
Eljimb0 is offline Find More Posts by Eljimb0
Reply With Quote  (Disabled)
Old Jan 14, 2010, 11:51 AM
Suspended Account
Joined Sep 2009
4,831 Posts
Well, to ask ole Yamamoto means a one way trip to you know where, but I suspect his answer is obvious.

There is nothing unique about this design principle, and it has been used for many decades in many airframes.

There is no doubt Johnson was a genius-ask Yamamoto.

Oh, that's where we started.
angelfood is offline Find More Posts by angelfood
Reply With Quote  (Disabled)
Old Jan 14, 2010, 01:50 PM
Registered User
*Voodoo*'s Avatar
Granby,Quebec,Canada
Joined Aug 2009
145 Posts
Hi,i am thinking about buying one of these kits...it comes with 2 BL motors...now should i toss them and put better motors in?..if so what do you recommend...

And should i change the esc's also?

Thank you

Sylvain
*Voodoo* is offline Find More Posts by *Voodoo*
Reply With Quote
Old Jan 14, 2010, 02:34 PM
Suspended Account
Joined Sep 2009
4,831 Posts
Toss 'em or sell 'em: it will fly, but barely.

Contact Jeff at headsuprc.com and ask for the higher power setup-I spec'd it for him and I've forgotten the details.

Mine is a fast-flying, but efficient beauty.
angelfood is offline Find More Posts by angelfood
Reply With Quote  (Disabled)
Old Jan 14, 2010, 02:38 PM
Suspended Account
Joined Sep 2009
4,831 Posts
Also, BE SURE to reinforce the area around the nosegear mount with fiberglass or something like that-sooner or later, a stock setup will fail.
angelfood is offline Find More Posts by angelfood
Reply With Quote  (Disabled)
Old Jan 14, 2010, 02:42 PM
Registered User
kensp's Avatar
Darwin Australia
Joined May 2002
6,960 Posts
Quote:
Originally Posted by dLdV View Post
Did the full scale P-38 counter rotate? Did you opt for counter rotate on your model?
I did try the 3 blade GWS propellers in the opposite rotating mode but the pitch speed was too low.

I went back to using same rotation 2 blade propellers because I could get better pitch speed and the handeling of my GWS-38 showed no real improvement when the opposite rotating propellers were used. If GWS made a RH and LH 8 x 6 x 3 blade propeller set then I would try these as they would overcome the low pitch speed problem.

So far my research has uncovered only two aircraft that used propellers that rotated in opposite directions on separate engines. They are the Locheed P-38 and the de Havilland Hornet. http://en.wikipedia.org/wiki/De_Havilland_Hornet

Ken
kensp is offline Find More Posts by kensp
Last edited by kensp; Jan 14, 2010 at 02:47 PM.
Reply With Quote
Old Jan 14, 2010, 02:45 PM
Suspended Account
Joined Sep 2009
4,831 Posts
Warbirds, maybe-civilian aircraft, plenty.
angelfood is offline Find More Posts by angelfood
Reply With Quote  (Disabled)
Old Jan 14, 2010, 04:51 PM
Registered User
kensp's Avatar
Darwin Australia
Joined May 2002
6,960 Posts
Quote:
Originally Posted by angelfood View Post
Warbirds, maybe-civilian aircraft, plenty.
Last night I spent about 2 hours searching the Photo Database on http://www.airliners.net/ and did not find one multi-engined civilian aircraft with propellers that rotated in opposite directions.Here a few of the many photos that I downloaded

Ken
kensp is offline Find More Posts by kensp
Last edited by kensp; Jan 14, 2010 at 06:21 PM. Reason: Add photos
Reply With Quote
Old Jan 14, 2010, 06:07 PM
Woodsy
Drouin, Australia
Joined Sep 2003
2,117 Posts
Hmmm. may be i've been led astray some where along the line.
i've always been told they spin that way so as to reduce the chance of the plane snapping in to a roll caused by engine torque on an engine out.

any way i'm pretty sure i'm correct as far as the P38 goes
woodsy is offline Find More Posts by woodsy
Reply With Quote
Old Jan 14, 2010, 06:23 PM
Suspended Account
Joined Sep 2009
4,831 Posts
Quote:
Originally Posted by kensp View Post
Last night I spent about 2 hours searching the Photo Database on http://www.airliners.net/ and did not find one multi-engined civilian aircraft with propellers that rotated in opposite directions.Here a few of the many photos that I downloaded

Ken
http://en.wikipedia.org/wiki/Counter...ing_propellers

Common as fleas on a monkey's back.

Say, is it true that when you guys flush, the water runs counterclockwise?
angelfood is offline Find More Posts by angelfood
Reply With Quote  (Disabled)
Old Jan 14, 2010, 07:02 PM
Registered User
kensp's Avatar
Darwin Australia
Joined May 2002
6,960 Posts
Quote:
Originally Posted by angelfood View Post
http://en.wikipedia.org/wiki/Counter...ing_propellers

Common as fleas on a monkey's back.

Say, is it true that when you guys flush, the water runs counterclockwise?
Down here in Australia, below the equator, myth says that the water runs runs clockwise. I wonder if Mythbusters have ever covered the subject.

Thank you for giving that list of Counter-rotating propeller equipped aircraft. I am taking a record of the list. It is interesting that the Airbus 400 M has opposite rotating propellers on the same side of the wing

Ken
kensp is offline Find More Posts by kensp
Last edited by kensp; Jan 14, 2010 at 07:22 PM.
Reply With Quote
Old Jan 14, 2010, 07:08 PM
Suspended Account
Joined Sep 2009
4,831 Posts
The list is NOT complete.

Years ago, as an active pilot, I don't recall flying a twin that wasn't so equipped.

But, then, my memory dims over time.
angelfood is offline Find More Posts by angelfood
Reply With Quote  (Disabled)
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Gws 二次大戰 名機 Gws-38 GWS CHEN Japan 6 Jan 01, 2007 10:36 AM
GWS-38 Twin Fighter Randori GWS (Grand Wing Servo) 154 Dec 13, 2006 02:35 PM
Discussion GWS-38 soon 廣營新的戰鬥機即將上市. GWS CHEN Taiwan 15 Dec 11, 2006 11:35 PM
New Product ****Must check GWS New Airplane GWS-38**** RAY GWS Product Announcements 24 Oct 25, 2006 11:21 PM
New Product GWS-38 (P-38 Lightning)... its here. Blaze.45 Hot Online Deals 18 Oct 05, 2006 12:39 PM