SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old Jan 25, 2012, 11:48 AM
Registered User
I TOBOR's Avatar
Joined Feb 2007
2,775 Posts
Since what most people refer to as vibration on a Saito is actually tortional impulses as a result of a light engine and strong power pulses any kind of a soft mount will only exacerbate the situation. A prop with some weight to it will eliminate the tortional impulses.
I TOBOR is offline Find More Posts by I TOBOR
Reply With Quote
Sign up now
to remove ads between posts
Old Jan 25, 2012, 08:00 PM
Registered User
MaverickP-51D's Avatar
United States, TX, Palestine
Joined Dec 2007
165 Posts
yep, heavy prop helps dampen the vibrations (pulses)
i wont swear to this, but seems prop orientation makes a difference too.
piston at TDC one prop blade at 2 o'clock.
Just seems to run smoother.
MaverickP-51D is offline Find More Posts by MaverickP-51D
Reply With Quote
Old Jan 25, 2012, 09:49 PM
Fly'em like you Stole'em
MikeMcChiken's Avatar
The Gehto,Ca.
Joined Jun 2008
1,115 Posts
Quote:
Originally Posted by Transplant92 View Post
Is this a members site? Someone tell me how I cvan recieve info on this site.
Welcome Transplant , Just ask a question if you have any . Lots of great and knowledgable people here .

Page 1 , post 1 on this thread has lots of links for self help . Check those out . Lots of good info there .

My question being , how does the carb ice?
MikeMcChiken is offline Find More Posts by MikeMcChiken
Reply With Quote
Old Jan 26, 2012, 06:16 PM
Twistaholic AMA 134406
Dad_Roman's Avatar
USA, TX, Teague
Joined Jul 2007
5,622 Posts
Quote:
Originally Posted by MikeMcChiken View Post
My question being , how does the carb ice?
Ill let PIPE get all technical with ya

Easy answer. Vaporisation of fuel, expansion of the molecules going from a liquid to a semi-gaseous state all lead to quicker evaporation rates and allllllllllllll of this has a cooling effect so dramatic that components like the carb and intake runners will freeze the water vapor in the air thats touching it even on the nicest of days (not unlike the freon in the ole AC)

And of course alchohol lends itself nicely to this.
Dad_Roman is offline Find More Posts by Dad_Roman
Reply With Quote
Old Jan 26, 2012, 07:22 PM
Dieselized User
gkamysz's Avatar
Chicagoland
Joined Feb 2000
7,346 Posts
I think the chances of carb icing with methanol are pretty slim. Methanol and water is what's windshield washer fluid. It does a pretty good job of not freezing to what -20F? Gasoline is not soluble in water, so the water freezes if conditions are right.

greg
gkamysz is offline Find More Posts by gkamysz
Reply With Quote
Old Jan 26, 2012, 07:33 PM
Twistaholic AMA 134406
Dad_Roman's Avatar
USA, TX, Teague
Joined Jul 2007
5,622 Posts
I assumed we were talking about the outside

Are we talking about internal icing?
Dad_Roman is offline Find More Posts by Dad_Roman
Reply With Quote
Old Jan 26, 2012, 08:05 PM
Dieselized User
gkamysz's Avatar
Chicagoland
Joined Feb 2000
7,346 Posts
Oh, silly me, external icing is only a problem when I plant one in the snow.
gkamysz is offline Find More Posts by gkamysz
Reply With Quote
Old Jan 26, 2012, 08:19 PM
Twistaholic AMA 134406
Dad_Roman's Avatar
USA, TX, Teague
Joined Jul 2007
5,622 Posts
Quote:
Originally Posted by gkamysz View Post
...... when I plant one in the snow.
Whats that?
Dad_Roman is offline Find More Posts by Dad_Roman
Reply With Quote
Old Jan 27, 2012, 06:03 AM
Registered User
The PIPE's Avatar
USA, MA, Weymouth
Joined Mar 2004
1,095 Posts
My Saito 56 has a chromed intake tube, too...

Dear Dad Roman & Fellow Saito Lovers:

The PIPE Here yet again - just got copies off the 'Net earlier this week of scale drawings for the "original" Aeronca C-2 Golden Age classic American monoplane (the exact one I'd do is the Smithsonian's one, at http://www.nasm.si.edu/collections/a...d=A19490051000 , and I've got their book on it!), and it's a design I'd loove to do for 1/4th sized Giant Scale flying with a used FA-130T Saito opposed twin mill on its nose for its power someday, once I get back to work and could finally GET one.

The Saito 56 that's first going into my unbuilt Telemaster 40 kit HAS the exact same sort of well-chromed intake tube as my FA-45 has, and I'd suppose if I was running the FA-56 on the Telly-40's nose...without a cowl on it (I've designed a custom, CAD-drawn lightplane-style cowl for it) on a chilly early spring morning (after 8 am) when it's been somewhat damp outdoors, I'd certainly bet that there WOULD be a bit'o'frost along the outside of that chromed intake tube from running the 56 a bit on a morning like that...

...but as methanol IS the sort of ingredient that can be found in antifreeze, I'd seriously doubt I'd ever see frost INside the intake tract. If I ever had engine running problems on such a morning, I might suspect "carb ice" might be there if I took all the frost off the outside (indicating that the intake tube WAS getting well-chilled) and continued to have symptoms of a "gagged mill" from ice INside the intake tract, but I've never had engine running problems with any of my four-stroke mills, in colder weather, that could be attributed to "carb ice" of any sort.

Just hoping that this "settles things" a small bit, as I've started taking my last pair of online college classes this week towards earning the business degree by June-and I've REALLY got to stick to those classes to keep those grades up!

Thanks & Yours Sincerely,

The PIPE....!!
The PIPE is offline Find More Posts by The PIPE
Last edited by The PIPE; Jan 27, 2012 at 06:13 AM.
Reply With Quote
Old Jan 27, 2012, 08:55 AM
TDI Abuser
flyinghigh's Avatar
Joined Sep 2002
4,125 Posts
I would definitely say that I see constant condensation build up on the outside intake and that would lead to icing up in cold weather. And that's without going all into the use of methanol as a way to cool down intake temps in performance engines.
flyinghigh is offline Find More Posts by flyinghigh
Reply With Quote
Old Jan 28, 2012, 08:06 PM
Fly'em like you Stole'em
MikeMcChiken's Avatar
The Gehto,Ca.
Joined Jun 2008
1,115 Posts
My bearings are toast on my Saito115 . The motor was discontinued and hanger9 only has the main crank bearing . I looked at Boca and they dont even list the 115 . Does anyone know if they are the same as another engine sizes bearings ? The 100 was the same as the newer 120 but thats all I found .

Heres a cool list for bearing sizes I found for all types of engines . I'll put it on page 1 under all the links .

http://www.modelfixings.co.uk/saito.htm
MikeMcChiken is offline Find More Posts by MikeMcChiken
Reply With Quote
Old Jan 28, 2012, 09:07 PM
Registered User
I TOBOR's Avatar
Joined Feb 2007
2,775 Posts
http://www.horizonhobby.com/products...ler-al-SAIE115

http://www.horizonhobby.com/products...ler-al-SAIE115

Mike, the 1.15 does not appear to be discontinued.
I TOBOR is offline Find More Posts by I TOBOR
Reply With Quote
Old Jan 28, 2012, 09:22 PM
Fly'em like you Stole'em
MikeMcChiken's Avatar
The Gehto,Ca.
Joined Jun 2008
1,115 Posts
Quote:
Originally Posted by I TOBOR View Post
I would have never checked Horizon . My LHS said the front bearing was not in stock and they could get the rear . He also said the motor was discontiued . Thats probly the first time they steered me wrong . Must have been a newb .

Thanks for the heads up .
MikeMcChiken is offline Find More Posts by MikeMcChiken
Reply With Quote
Old Jan 28, 2012, 09:35 PM
Registered User
Eastlake, OH
Joined Aug 2003
156 Posts
[QUOTE=MikeMcChiken;20569164]My bearings are toast on my Saito115 . The motor was discontinued and hanger9 only has the main crank bearing . I looked at Boca and they dont even list the 115 . Does anyone know if they are the same as another engine sizes bearings ? The 100 was the same as the newer 120 but thats all I found .

/QUOTE]

Checked the Horizon Hobbies site. They list the front bearing #SAI 120S20A and
the rear bearing #SAI 11522 as both being in stock.
Fred
fsheplavy is offline Find More Posts by fsheplavy
Reply With Quote
Old Jan 29, 2012, 09:39 AM
Fly'em like you Stole'em
MikeMcChiken's Avatar
The Gehto,Ca.
Joined Jun 2008
1,115 Posts
Shows in stock here . Click on parts and accesories

http://www.horizonhobby.com/products...ler-al-SAIE115
MikeMcChiken is offline Find More Posts by MikeMcChiken
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Composites Forum on RC Groups? TGoodwin Composites Fabrication 9 Oct 01, 2004 03:49 AM
PLEASE KILL ACTIVE X on RC Groups. windsurfer Site Chat 7 Apr 19, 2004 02:16 PM
Help! Large font on RC Groups! Lenny970 Site Chat 4 Mar 20, 2004 10:52 PM