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Old Yesterday, 06:33 AM
  #47076  
rowdog_14
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Anyone know anyone that could still possibly make a customized exhaust for a saito 60t? I need it to tuck pretty tight to the bottom of the engine and drop/turn down only very very little. I will add rubber exhaust extension to have it clear the cowl.





Old Yesterday, 06:51 AM
  #47077  
acdii
 
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Once I got my 125 running, I got it dialed in and it pulls strong. The trick will be if it stays that way.
Old Yesterday, 06:52 AM
  #47078  
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Hot Dang, Petio is back!

Acdii, those 115's and 125's will make rated power if everything is right. No different than any other Saito, sans the 82.





Last edited by Glowgeek; Yesterday at 08:01 AM.
Old Yesterday, 07:58 AM
  #47079  
Hobbsy
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Row, these might get you started: https://www.hobbyplastic.co.uk/index...oducts_id=2234
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Old Yesterday, 08:02 AM
  #47080  
Hobbsy
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If I can get to it I'm going to run this Xoar 18 x 6 gas painted prop today.


Old Yesterday, 08:09 AM
  #47081  
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Very nice prop Dave. She's a dandy!

I haven't tried an 18" on my 150, too big for 60 sized warbirds. The 150 will need some nuggets to turn that prop much over 8K.
Old Yesterday, 11:46 AM
  #47082  
the Wasp
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Originally Posted by Monty Python View Post
Close but no cigar

Dave i thought singling out an fa125 for a serious destruction test would have given me away. Even though apc props can look as ugly as the grey graupners nearly, you can't see them when flying and their flying performance is very good. Also easy to check max rpm for your saito against factory figures as they are saito's recommended benchmark prop.

Acdc when first test flying over powered high performance low winged tail draggers i run a mas classic so if you throttle up too quickly and it noses over late in the takeoff run you still get airborne and can fly it instead of ending up in the trees.I once ground half the white tips off a mas classic, you could hear it and see the prop reducing in diameter, the wooden prop boys were amazed when i landed and they had a close look, i hung that one on the shed wall behind the bar. Apc pattern props with a light ground strike will usually just lose the tiny tip point but any heavier, such as when you are doing touch and goes or low loops will shatter the ends with long cracks going towards the prop hub, if you get airborne again you plane is vibrating bad because one tip has lost a small lump of plastic.

Howdy lonnie and jim

ps lonnie you must be a good influence on jim if he's given up his smelly heli two strokes
Hi Pete, it's really good to have you back!!!
yes Sr, I got rid of that smelly 2st, in fact you will be happy to know I got rid of 3 smelly 2st in one box LOL. but I still have 3 unique 2st left, sorry about that

Jim
Saito engines have longer props
Old Yesterday, 12:03 PM
  #47083  
the Wasp
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Originally Posted by Glowgeek View Post
Very nice prop Dave. She's a dandy!

I haven't tried an 18" on my 150, too big for 60 sized warbirds. The 150 will need some nuggets to turn that prop much over 8K.
yes Sir, the Xoars are real loaders, they don't flex as much as APC's. if you go to the Tach page you will see that the FA180 will turn an APC 17x8w at 8900 to 9100.

Jim
Old Yesterday, 12:18 PM
  #47084  
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Well, crap. I need a spinner for my Chipmunk, and found a 2" red one, perfect right? except not large enough for a MAS for the FA-100. I don't have an APC or XOAR for it either. Guess I have to go shopping after all. I also need a 90* exhaust for it to clear the cowl, so going to find the taps and dies and some brass stock to make one.
Old Yesterday, 12:19 PM
  #47085  
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Originally Posted by the Wasp View Post
yes Sir, the Xoars are real loaders, they don't flex as much as APC's. if you go to the Tach page you will see that the FA180 will turn an APC 17x8w at 8900 to 9100.

Jim
8900 with 15% nitro is spot on. It would take 30% nitro to reach 9100.

FWIW, some of the crazy numbers I see on those tach pages is one of the reasons I set up my own testing standards. Apc props, 15%nitro/17.5% oil, F plugs, a sturdy test stand and the static thrust calculator I have posted links to so many times.
I discovered two helpful things in doing that, one is I can determine the health of my engines and the other is that I don't have to take a handful of props to the field to make my plane fly right.

.103 X CC is an excellent way to determine expected hp from our Saito singles set up as noted above.
Old Yesterday, 12:26 PM
  #47086  
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Originally Posted by acdii View Post
Well, crap. I need a spinner for my Chipmunk, and found a 2" red one, perfect right? except not large enough for a MAS for the FA-100. I don't have an APC or XOAR for it either. Guess I have to go shopping after all. I also need a 90* exhaust for it to clear the cowl, so going to find the taps and dies and some brass stock to make one.
I just dremel out the spinners and rebalance them.

When you make your adaptor leave a radiused fillet where the male threads transition into the larger adaptor body. A squared off transition will form a stress riser and crack every time.

Last edited by Glowgeek; Yesterday at 12:32 PM.
Old Yesterday, 12:37 PM
  #47087  
acdii
 
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Originally Posted by Glowgeek View Post
I just dremel out the spinners and rebalance them.

When you make your adaptor leave a radiused fillet where the male threads transition into the larger adaptor body. A squared off transition will form a stress riser and crack every time.

Wont fit, the posts inside the spinner are moved a hair from the width of the prop, so they don't align properly. I found the 90* adapter, it's $17, vs $40 for tap and die and would also need a larger die holder, so just went ahead and ordered one.
Old Yesterday, 12:43 PM
  #47088  
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I may have a 2" Truturn spinner that would work for you. Be right back.........


........nope, 2-1/4" is the smallest I have.

I do have a bunch of TT and Dave Brown 3" Aluminum spinners if anyone is interested. Also have a 3 blade 2-5/8"

Last edited by Glowgeek; Yesterday at 12:53 PM.
Old Yesterday, 02:06 PM
  #47089  
Hobbsy
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I looked and found the DynaThrust props I thought I have. A 20 x 8 and a 14 x 6. I could use the 20 x 8 on my 180.


Old Yesterday, 02:15 PM
  #47090  
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I am going to attend this, just to see how the other half lives.


Old Yesterday, 02:50 PM
  #47091  
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Electric? Blasphemy That Fredricksburg field is a top notch facility, wish I had something like that close by.

Having read what I have about those Dynathrust props I wouldn't feel safe anywhere near one. Ejecting blades from the hub may be why they went out of business?

I read where you haven't had any problems with them Dave, that's good and I hope it stays that way. Be careful Dave, pretty please.

Last edited by Glowgeek; Yesterday at 03:27 PM.
Old Yesterday, 03:50 PM
  #47092  
triumphman49
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Have also read some negatives on Dynathrust props, but believe under 10k they are safe enough. Have some 12" thru 20" - and use them on K &B Sportsters and 4-strokes mostly
Old Yesterday, 11:02 PM
  #47093  
Monty Python
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Rowdog, i'd use some aluminium pipe and a hand held bender, slip the adapter for the exhaust thread on and flare that end. My fa182 twin came with very thick aluminium crush washers.

Hi capt, i have a small, and very vicious, brown and white fox terrier called saito who will be happy to bury your lazy fa125's

Lonnie i am very happy with my three fa82 engines,they are my go to engines for 46 size arf's like the decathlon, the one with the huge dent in the intake tube pulls 300 rpm more than the other two.

ps i hope they let me keep the junior member tag it makes you feel younger
Old Today, 03:02 AM
  #47094  
Hobbsy
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A little common sense makes anything and everything safe.

I forgot to show what I did with those black elbows, I used them to adapt two Saito FA 30 mufflers. What a magnificent sound.


Last edited by Hobbsy; Today at 03:54 AM. Reason: Add picture
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Old Today, 03:54 AM
  #47095  
Glowgeek
 
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Have a plane slated for that pretty little 60T?
Old Today, 07:27 AM
  #47096  
Hobbsy
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Yep, an RCM 60 I need to cover.OK, the numbers with big black Xoar 18 x 6
Max at two clicks south of peak==7,770
Idle======================1,920
With wood Xoar 16 x 8
Max RPM=================8,490 with two tach's, a Hobbico and the fancier Globee
Idle======================2,190




After today's run. Note brass tail piece repair job, it turned blue.

Last edited by Hobbsy; Today at 07:51 AM.
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Old Today, 09:15 AM
  #47097  
Glowgeek
 
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Your fa150 numbers look pretty good to me Dave.
Old Today, 12:37 PM
  #47098  
Hobbsy
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Thanks, after 16 OZ more fuel the compression is even higher, a 16 x8 APC and a MS Classic are on the way. The rocker lash did not change this time. That big wide bladed 18 x6 was a bit much, I think.
Old Today, 01:13 PM
  #47099  
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I have a half dozen MA Classic props but nothing appropriate for testing an fa150. Your MA 16x8 will be an interesting test when compared to an apc 16x8 which a healthy 150 will turn 8700-8800 peak.
Old Today, 02:05 PM
  #47100  
rafeeki
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Default Fa150

I run my Golden Knight FA150 on Cool Power MV fuel. Turning a wooden Xoar 18x6 pulling the Hangar 9, 1/4 scale Tiger Moth. Its much more than I need .
For a while I had an APC 17x8.
With both props its been doing 8,200rpm +/-

Hope this helps

Rafeek

Last edited by rafeeki; Today at 02:07 PM. Reason: Tweaking

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