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Old 09-03-2020, 05:36 PM
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Originally Posted by FlyerInOKC
Performance wise how do they compare or is the newer design more intended to be ecstatic pleasing and/or easier to manufacture ?
Good question Mike. WRT power I really don't know, I've only had one 120, the fathead I just got a couple of weeks ago. I can say this though, the difference in weight between the ABC Fathead and the newer AAC design is night and day.

The Fathead is a beastly chunck of metal and to me it looks BA!

Last edited by Glowgeek; 09-03-2020 at 05:38 PM.
Old 09-03-2020, 06:59 PM
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Pete,

That original rear cover is set up with the tank pressure check valves. The valves worked in conjunction with a pressre bleed valve to pressurize the tank. Some had problems with the system, others got it to work. Should you ever care to experiment, I have the valves and a needle assembly that I will send along.

IIRC,the fathead, heavyweight did about 8300 RPM on a typical wood 15-8 of the day type prop. Perhaps a turn better with an APC. The idle was amazing with the old bucket tappeted cam.

Last edited by Jesse Open; 09-03-2020 at 07:02 PM.
Old 09-03-2020, 07:10 PM
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Anyone know who carries a solid metal spinner nut with M7 x 1 internal threads to fit a Saito 62? I am having trouble finding one of these.
Old 09-03-2020, 07:42 PM
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Originally Posted by Outrider6
Anyone know who carries a solid metal spinner nut with M7 x 1 internal threads to fit a Saito 62? I am having trouble finding one of these.
Try here ( https://www.dbproducts.com/index2.htm ) they show 4 different lengths and a lock nut available.
Old 09-03-2020, 07:45 PM
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Originally Posted by FlyerInOKC
Try here ( https://www.dbproducts.com/index2.htm ) they show 4 different lengths and a lock nut available.
Thanks, but I'm looking for a solid spinner nut - not just a regular aluminum spinner. Kind of like this, but with M7 x 1 threads: https://www.towerhobbies.com/product.../OSMG2925.html

Old 09-03-2020, 07:46 PM
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Last edited by Jesse Open; 09-04-2020 at 03:54 AM.
Old 09-03-2020, 07:48 PM
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Old 09-03-2020, 07:52 PM
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Originally Posted by Outrider6
Thanks, but I'm looking for a solid spinner nut - not just a regular aluminum spinner. Kind of like this, but with M7 x 1 threads: https://www.towerhobbies.com/product.../OSMG2925.html

Would something like this work?

Ultra_Heavy_Hub
Old 09-03-2020, 07:53 PM
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Originally Posted by Jesse Open
Yep, A 10 cent hex nut and a washer do the same thing.
I am not missing my prop nut. I need a spinner that looks something like this, and preferably something heavy:


Old 09-03-2020, 07:55 PM
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Originally Posted by Jesse Open
This would be about the best I could do for you. Made a dozen but only one left.

If outrider6 doesn't want (He did ask first) I'll take it just PM me a price and I'll get it off to you. It will look great on a Golden Era aircraft!
Old 09-03-2020, 07:55 PM
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Originally Posted by FlyerInOKC
Would something like this work?

Ultra_Heavy_Hub
Yep - that may be just what I need. Thanks.
Old 09-03-2020, 07:56 PM
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Originally Posted by FlyerInOKC
If outrider6 doesn't want (He did ask first) I'll take it just PM me a price and I'll get it off to you. It will look great on a Golden Era aircraft!
That wouldn't work for me, but thanks anyway.
Old 09-03-2020, 08:02 PM
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Originally Posted by Outrider6
Yep - that may be just what I need. Thanks.
If the brass is a too heavy Harry makes it in Aluminum too. Ninety_Hub
Old 09-04-2020, 02:46 AM
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Originally Posted by Outrider6
I am not missing my prop nut. I need a spinner that looks something like this, and preferably something heavy:



Yes, I understand, that was intended as a joke.Not really directed to you.




One of these may be more like it.
Old 09-04-2020, 02:48 AM
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True turn spinners makes hubs just Like what you want I have a couple Myself. Look for Higley Hubbs
they also have a good selection.
Old 09-04-2020, 06:42 AM
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The Brass nut (spinner) above I believe is still one the shop if you want it. There is also an optional flywheel that wraps around the drive hub and extends thru the cowl. That Flybaby needed a lot of nose weight even with two large batteries straddling the fuel tank. Plane started out with a stupidly overpower .82 Saito and wound up with a very capable .62.

Anyhow, if you can use that "spinner" nut, let me know.

Old 09-04-2020, 07:40 AM
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Gary,
I tried the pressure system you talk about above years ago. I spent hours trying to get it to work just right. I could never hit the sweet spot where everything balanced out. I was much happier without it. Now I will say I had a lot less experience back then. Right now the 120 Dual Plug runs great without it and should be in the air today.
Pete
Old 09-04-2020, 08:14 AM
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Originally Posted by modeltronics
Gary,
I tried the pressure system you talk about above years ago. I spent hours trying to get it to work just right. I could never hit the sweet spot where everything balanced out. I was much happier without it. Now I will say I had a lot less experience back then. Right now the 120 Dual Plug runs great without it and should be in the air today.
Pete
Exactly,

Mostly used by pattern fliers back in the day, a bit fussy. I use the valves to promote better case venting, period.
Old 09-04-2020, 08:50 AM
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Originally Posted by Jesse Open
Exactly,

Mostly used by pattern fliers back in the day, a bit fussy. I use the valves to promote better case venting, period.
I use the factory supplied vent, works just fine as far as I can tell. Regardless of the factory location (front or rear) the factory venting leaves approx 1-2 ml of residual oil in the case.

If a checked venting system is better I'd love to hear how.

Last edited by Glowgeek; 09-04-2020 at 06:07 PM.
Old 09-04-2020, 09:45 AM
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Surely you would, I usually move the rear vent forward, among other changes.
No thanks Lonnie nice try.

Last edited by Jesse Open; 09-04-2020 at 09:53 AM.
Old 09-04-2020, 11:53 AM
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Cap44, The Saito 30 is on the way.
Hobbsy, If you are monitoring, the Saito mufflers are on the way.
Modeltronics, The Saito 120 is also on the way.

Dave, hoping for healing. My very deepest regrets to your daughter and the young man's father especially.
Old 09-04-2020, 02:35 PM
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Originally Posted by Jesse Open
Surely you would, I usually move the rear vent forward, among other changes.
No thanks Lonnie nice try.
Are you reading between the lines and finding things that aren't there again? A simple question from curiousity on my part results in smoke and mirrors on yours? Seems to happen more often than not lately. Keep your secrets.
Old 09-04-2020, 03:10 PM
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Based on recent history, your initial comment set the tone.
Not smoke and mirrors at this end.
I don't resort to the valves often. Certainly not about regulating oil levels.
Seems you are happy with the stock setup.

Let's just agree to disagree and save time
Old 09-04-2020, 04:30 PM
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I flew the 120 Dual Plug for three flights today. Late morning it was overcast and that is my favorite sky to fly in. The first flight was 20 minutes and I could see a healthy smoke trail. One thing I like about this plane is that in a low slow pass I can see how much fuel I have in the tank. After landing I leaned it two clicks, fueled up and was back in the air. I did not tach it, but it has more than enough power for this plane. The throttle response on this engine is excellent. On the last flight I wanted to try different glow plugs. I installed 2 Fireball hot plugs. The engine started just fine and ran the same as the OS F plugs. On starting the engine every time, I only applied power to the back plug. It would be interesting to know how it would run with a bad plug in the front.

Iím going to pull the engine off the plane this weekend and let it sit waiting for its new power source, Garyís Fat Head 120. I will install that engine after a brief run on the test stand using my low nitro home brew.

The 120 DP was a fun project.

73s
Pete
Old 09-04-2020, 05:41 PM
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Originally Posted by modeltronics
I flew the 120 Dual Plug for three flights today. Late morning it was overcast and that is my favorite sky to fly in. The first flight was 20 minutes and I could see a healthy smoke trail. One thing I like about this plane is that in a low slow pass I can see how much fuel I have in the tank. After landing I leaned it two clicks, fueled up and was back in the air. I did not tach it, but it has more than enough power for this plane. The throttle response on this engine is excellent. On the last flight I wanted to try different glow plugs. I installed 2 Fireball hot plugs. The engine started just fine and ran the same as the OS F plugs. On starting the engine every time, I only applied power to the back plug. It would be interesting to know how it would run with a bad plug in the front.

Iím going to pull the engine off the plane this weekend and let it sit waiting for its new power source, Garyís Fat Head 120. I will install that engine after a brief run on the test stand using my low nitro home brew.
The 120 DP was a fun project.
73s
Pete
knowing just how much fuel is in your well running RC plane is one thing, crashing because you don't know how much fuel is in your tank is something else of a different sort.

Jim
the Saito Engine; the sort where all others are less

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