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Old 08-05-2020, 10:10 AM
  #47126  
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Put an FA 100 with a 15x8 on it, you wont need water or a runway.
Old 08-05-2020, 10:47 AM
  #47127  
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Originally Posted by Hyjinx View Post
Ok Guys
Utter devastation and woe unto me.
My FA 62 wouldn't lift my goldberg arf cub off the water this morning.
7000 rpm with a 12/10 on it. Couldn't break the water lock.
Probably lucky it didn't on the maiden.
Actually a 12/9 Zoar beech. With 10% fuel
Old 08-05-2020, 10:50 AM
  #47128  
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Originally Posted by acdii View Post
Put an FA 100 with a 15x8 on it, you wont need water or a runway.
Got three of em. Would fly it without the wings lol

Old 08-05-2020, 11:09 AM
  #47129  
rowdog_14
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Originally Posted by Glowgeek View Post
Holy Moly! It's missing a sizable chunk of steel. I wonder where that went.
YOU AND ME BOTH!!!!. It actually ran pretty dang good considering but that is a large chunk and I need to make sure not other damage was done and figure out where the heck that chuck is. Hopefully still stuck in the front cam gear bearing shield when I take it apart.
Old 08-05-2020, 11:59 AM
  #47130  
the Wasp
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Originally Posted by Monty Python View Post
Jim the dent choked the fa82 intake tube by 1/3 nearly half and since that engine out revs the other two it must be near the mythical g spot.

that engine must be a very happy engine

Jim
Old 08-05-2020, 12:05 PM
  #47131  
the Wasp
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Originally Posted by Glowgeek View Post
Sweeeet.

My numbers for the 115 using 15%, F plug and apc props:

FA115
16x8 (7830) 1.812 HP
17x6 (8170) 1.968 HP
15x8 (8680) 1.907 HP
16x6 (8700) 1.864 HP
14x8 (9800) 2.083 HP
15X6 (9850) 2.090 HP
yee-up, that 9850 is about 200 more than what the 100 will pull with a APC 15x6. and I'm betting that number will come up another 50 to 150 after you get more time on that rebuild.

Jim


Last edited by the Wasp; 08-05-2020 at 12:19 PM.
Old 08-05-2020, 12:07 PM
  #47132  
the Wasp
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Originally Posted by glowgeek View Post
yeah, and they pass wind with no noise or smell. Where's the fun in that?:d
lol lol lol
Old 08-05-2020, 12:12 PM
  #47133  
the Wasp
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Originally Posted by rowdog_14 View Post
Glowgeek Thanks for the suggestion. That still did not work so I decided to pull the engine apart and saw the cam was damaged probably causing it to no turn true. If you see the end of the cam of broken off. Which in turn was probably causing the intake valve to not function properly. Does not seem like any other damage was done but will fully break it down just in case.

dang !!
what are you going to do now ?? does Horizon have a new cam ??

Jim
Old 08-05-2020, 12:12 PM
  #47134  
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oop
Old 08-05-2020, 01:15 PM
  #47135  
rowdog_14
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Originally Posted by the Wasp View Post
dang !!
what are you going to do now ?? does Horizon have a new cam ??

Jim
Nope, I do not think anybody does...at least from my search. So either have to look out for a junker or look out for parts.
Old 08-05-2020, 01:17 PM
  #47136  
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the new Father; is it a boy Dr, ??
Dr; yes, and it's a Flat Head !

Old 08-05-2020, 01:20 PM
  #47137  
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Originally Posted by rowdog_14 View Post
Nope, I do not think anybody does...at least from my search. So either have to look out for a junker or look out for parts.

hey ????? maybe the guy in my video^ I posted will make you a cam, at least PM him and ask him

Jim
Old 08-05-2020, 02:52 PM
  #47138  
Glowgeek
 
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Originally Posted by Hyjinx View Post
Ok Guys
Utter devastation and woe unto me.
My FA 62 wouldn't lift my goldberg arf cub off the water this morning.
7000 rpm with a 12/10 on it. Couldn't break the water lock.
Probably lucky it didn't on the maiden.
The problem is that the 9 " prop pitch is too high, it's dragging down an engine that makes peak torque at somewhere around 8200 rpm and peak hp at well over 11k.

With the Xoar 12x9 at 7000 rpm you are making only 2.88 lbs of thrust and .46 hp. Put a 12x7 on that same engine and you'll be making 5.31 lbs of thrust and .896 hp at 9300 rpm richened for flight.

Refer to bottom graph:




Hope this helps in some way.

Lonnie

Last edited by Glowgeek; 08-05-2020 at 02:55 PM.
Old 08-06-2020, 02:14 AM
  #47139  
Hobbsy
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Originally Posted by the Wasp View Post
dang !!
what are you going to do now ?? does Horizon have a new cam ??

Jim
That is not an uncommon occurrence, I have one exactly like it. Same cam as the 90TS.

Last edited by Hobbsy; 08-06-2020 at 02:21 AM.
Old 08-06-2020, 03:30 AM
  #47140  
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I just ordered bearings from BOCA, free shipping and free two day UPS. Some of you might want to jump on that.
Old 08-06-2020, 03:58 AM
  #47141  
N1EDM
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Hyjinx,
a .70 should spin that prop faster than 7K RPM, I think.

A similar thing happened to a friends Saito. We pulled the top covers and found that one pushrods had slipped out of its 'cup' on the rocker arm. One minute later, the problem was fixed and the engine ran OK...

Just something to check,

BOob
Old 08-06-2020, 08:08 AM
  #47142  
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Originally Posted by Hobbsy View Post
I just ordered bearings from BOCA, free shipping and free two day UPS. Some of you might want to jump on that.
They are great folks at Boca. They discount product and free ship every time for me. Never failed one of the ss bearing I pick on for corrosion resistance.
Never tried the ceramics.
Old 08-06-2020, 08:16 AM
  #47143  
Hyjinx
 
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Originally Posted by Glowgeek View Post
The problem is that the 9 " prop pitch is too high, it's dragging down an engine that makes peak torque at somewhere around 8200 rpm and peak hp at well over 11k.

With the Xoar 12x9 at 7000 rpm you are making only 2.88 lbs of thrust and .46 hp. Put a 12x7 on that same engine and you'll be making 5.31 lbs of thrust and .896 hp at 9300 rpm richened for flight.

Refer to bottom graph:




Hope this helps in some way.

Lonnie
Helps in a big way Lonnie. Thanks.
I knew one of you guys would pick up on that quick and make some suggestions I wouldn't have to research myself LOL.
I usually just use props that bring my Saitos to between 8500 and 9000 tops.
If that won't fly it I usually take a bigger Saito off the shelf and bolt It on.
I just don't like to sound they produce above that and conservative rpms make em last longer.
Just opinion there, just me.
Thanks Lon
Old 08-06-2020, 08:25 AM
  #47144  
Hyjinx
 
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Originally Posted by N1EDM View Post
Hyjinx,
a .70 should spin that prop faster than 7K RPM, I think.

A similar thing happened to a friends Saito. We pulled the top covers and found that one pushrods had slipped out of its 'cup' on the rocker arm. One minute later, the problem was fixed and the engine ran OK...

Just something to check,

BOob
Thanks Bob
Point well taken. This one is ok mechanically. Just a little gutless with 10% nitro. It will do a bit better on 15% but I don't like the heat. I don't tune for high performance either. Like them rich a bit too.
Generally I don't get the type of results test data shows for any of my r.c. engines. Even brand new ones.
Probably just the black cloud following me around.lol
At least there is always shade.👍
Old 08-06-2020, 12:24 PM
  #47145  
Glowgeek
 
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Originally Posted by Hyjinx View Post
Helps in a big way Lonnie. Thanks.
I knew one of you guys would pick up on that quick and make some suggestions I wouldn't have to research myself LOL.
I usually just use props that bring my Saitos to between 8500 and 9000 tops.
If that won't fly it I usually take a bigger Saito off the shelf and bolt It on.
I just don't like to sound they produce above that and conservative rpms make em last longer.
Just opinion there, just me.
Thanks Lon

Nothing wrong with running your engines a little slower than where peak torque or peak hp is made, helps with longivity. Now, if you go too far with over propping your engines and lug them down they will run hotter than needed and wear out sooner than necessary, same with under propping them to make them scream.
The fa62 and smaller engines are happy to run for many many years when propped for 10k on the ground so no danger there. Been there, still doing it today.

Old 08-07-2020, 03:03 AM
  #47146  
Hobbsy
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Master Air Screw Classic former, Master Air Screw Classic current.


Older

Current
Old 08-07-2020, 03:24 AM
  #47147  
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Are they the same design as the old Classics?
Old 08-07-2020, 03:43 AM
  #47148  
Hobbsy
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Nor sir, the blades are thinner and narrower.
Old 08-07-2020, 03:46 AM
  #47149  
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I was going to say they are a little different.
like there a little more refined.
I personally like the scimitar props, I just wish they made them and Wood again
Old 08-07-2020, 04:02 AM
  #47150  
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The MA K-Series is distinctly thinner, more refined and feels stiffer than the older Classic, it has squared tips. It's supposed to be designed for larger 2 and 4 strokes. I need to try it out, maybe on the YS this morning.

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