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Old 04-06-2022, 08:14 AM
  #52326  
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I have seen him fly. I Don't Think so Tim.
Old 04-06-2022, 09:11 AM
  #52327  
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Lol!
Old 04-06-2022, 02:06 PM
  #52328  
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Originally Posted by acdii
I have seen him fly. I Don't Think so Tim.
Maybe we should volunteer him for the Russian side.
Old 04-06-2022, 03:40 PM
  #52329  
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Originally Posted by Jesse Open
Maybe we should volunteer him for the Russian side.
EESH, maybe that would be worse for the Ukraines! After all, He EARNED Captain Crunch for a reason. For him a bad weekend at SIG is going home with intact planes still. LMAO..

Just Kidding Mike, you can't help it your pilots bail on you in flight.
Old 04-08-2022, 09:21 PM
  #52330  
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wow, check out this guy's YT channel

Jim

(1) Keith57000 - YouTube
Old 04-09-2022, 05:37 AM
  #52331  
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Cool!
Old 04-09-2022, 01:00 PM
  #52332  
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Default Sai74cl74


Since itís a little quiet in here I have a question. Has anybody here ever used one of these mufflers? Itís a SAI72CL74. This was intended for the control line version of the Saito FA-72. I bought it a long time ago and I donít think Horizon carries it anymore. What I donít like about it is there are no wrench flats on it to tighten it. Itís not much more than a hollow tube. Every time I look in my parts box and see it, I wonder how well it would work.

Old 04-09-2022, 05:25 PM
  #52333  
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is there enough room to mill 2 flats on the treaded side?

Jim
Old 04-09-2022, 06:23 PM
  #52334  
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Jim
Measuring through the plastic bag it is still in the wall thickness is about .050" so that does not leave enough room to mill a couple of wrench flats. I wonder why they made a different muffler for the control line engine and didn't use the same one as the RC engine.
Pedro
Old 04-10-2022, 03:29 AM
  #52335  
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You could use a strap wrench... This is an el-cheapo version but you get the idea. You'll need a small one for that small of a diameter...

Amazon Amazon

Just my $.02
Old 04-10-2022, 04:58 AM
  #52336  
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Pete,

I had several of those and actually sent a few out when I gave some engines away.
The absence of flats has not been a problem at all from my experiences. I tighten the exhaust pipe at the head and then find that a little bit of thumb pressure on the pressure tap allows one to begin tightening the muffler jam nut. Then, a firm grab on the engine and you can put sufficient torque on the jam nut. Being so small and light, never had a problem with it going loose. Of course, I always use SWAK or Loctite anerobic sealant so mufflers don't go loose anyhow.

The CL pipe has a nice bark but I kind of like it, plus it weighs next to nothing.


You will find that the CL pipe makes very good tank pressure.

Last edited by Jesse Open; 04-10-2022 at 05:04 AM.
Old 04-10-2022, 05:52 AM
  #52337  
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If I remember right that pipe was very inexpensive. I think I only paid about $12 for it. You are correct that it weighs next to nothing. Looking at it, I think it would be very easy to copy it using a lathe. Searching the web, I see that it is no longer available in the US but several places in the UK still sell it.
Old 04-10-2022, 12:35 PM
  #52338  
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Yes, extremely easy to clone. I was making a very similar pipe already before I came across the Saito made version. Just something to generate some tank pressure.

IIRC they made a version for the FA-62 as well.
Old 04-11-2022, 03:55 AM
  #52339  
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Yes, they made a CL muffler for the 10mm threaded 56 & 62 as well. Same design as for the 72.

Gary sent me a custom 12mm threaded tube muffler, very similar to the Saito 72 CL version, albeit with a slightly larger tube body and larger outlet . On my modified high compression 82 it produced a little more than 200 rpm gain on the top end versus the factory cast unit.
Old 04-11-2022, 11:20 AM
  #52340  
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I ordered new gaskets and shims for the HP 40, they should be here today. I have enough parts to make it a rear carb engine. this engine is in great shape with great compression. I found it's an oldy, it has a steel liner and iron piston. I wanted to buy a new ABC liner and piston for it. but that would cost me $75. and I don't wish to put that much more money into an engine I may never fly. never the less it will still be a good running engine. as of right now I have it and all parts heat soaking in antifreeze.

BTW, I also ordered a new "Blitz Liner" for my HB 61 PDP, this engine has never been mounted or started. can't wait to start it! I found the only thing that is difference between the PDP and the Blitz is that the Blitz has an ABC Liner and has a thinner standard type ring. so it has a different piston. the heads are the same just different color. and maybe the Blitz had a bit more compression out of the box?? the Blitz Piston and ring are not available, so I have to use the stock piston and Dykes ring. that's OK with me.

jim

Last edited by the Wasp; 04-11-2022 at 11:32 AM.
Old 04-14-2022, 12:46 PM
  #52341  
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anyone know anything about HP engines, I am having a problem getting the back plate in-stalled.

as I said, I am "trying" to turn a HP 40 size front carb engine into a rear carb engine. I have all the parts, the front bearing case from the rear carb engine fits as it should, as does it's crank pin.
but what I found is, that, the rear carb's back plate's OD is .015" larger than the case ID. what should I do here?

I can't put the back plate in a 4 jaw chuck, so what should I do?

Jim


Old 04-14-2022, 03:49 PM
  #52342  
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Screw the rear face of the back plate to a round or square block. Mount in the four jaw and use a dial indicator to center. Turn to size.

You will need to grind a hook shape cutter to finish turning the area under the screw heads.

Take care
Old 04-14-2022, 03:49 PM
  #52343  
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Screw the rear face of the back plate to a round or square block. Mount in the four jaw and use a dial indicator to center. Turn to size.

You will need to grind a hook shape cutter to finish turning the area under the screw heads.

Take care
Old 04-14-2022, 05:16 PM
  #52344  
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Default old FA-40



I have two of the old Saito FA40 MK3 engines. I don’t see these very often. These engines are not to be confused with the now available FA-40A. They look like the old Saito 45 but have a sticker on the case designating it a 40. My opinion is this engine was a heavy DOG. I would say this engine has about the power of the old OS pre-Surpass 40 with extra weight.

I think on the web I have seen only two references of a FA-40 Special. Similar to the 45 Special. I have a 45 Special and it is a sweet engine. I wonder what the 40 Special was like?

I do know that you can get a power boost from the 45 by using a 50 cam and cam cover. I am flying a trainer with this mod for several years and I can tell a difference in the way it flies. The 45 with the parts from the 50 is almost as strong as my 45 Special but the 45 Special is still the stronger engine. The 50 cam will not properly fit in a 45 or 40 cam cover. The lobes hit the top of the cover. I do not have a good way to measure the lift on the 50 cam vs the 45 cam. I can tell from looking at both cams that the duration of the open valve period is longer on the 50 cam. The 45 Special uses the 50 cam and cam housing.

I cannot find any parts list for the FA40 or the FA40 Special on the web.

One FA40 I have is now modified with the 50 cam and housing. I got about a 450 to 500 RPM boost in the top end using my home brew 3% nitro fuel and a Taipan 11X7 prop. The engine throttles well and I see no problem running it this way. I would fly it this way.

Looking at one web site I see the 45 Special does not use the same carb as the standard 45. The carb looks like a 50 carb but the part number is different. The carb housing for the 45 Special is the same part number as the carb housing for the 50. There must be some difference between a 50 carb and a 45 Special carb.

I am going to keep an eye out for a good 50 carb. The 50 carb mounts on the back plate different than the 45/40 carb. The 50 back plate will fit a 45 or 40 and I have an extra 50 back plate. I’m curious if there is more power to be had from this FA40. I did find two videos of a 40 Special all taken apart on You Tube and the carb looks like a 50 carb externally.

A side note. When I took the old black plastic pushrod tubes couplers off of the original FA40 cam cover they fell apart. Those plastic parts must have been 20 or 25 years old or older. Large silicon fuel line worked great as quick replacement.


Old 04-14-2022, 05:17 PM
  #52345  
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but I don't want to use the 4 jaw chuck cause it's a pain in the back side to use waa waa waa LOL

but on the good side of that I have Inserts that cut aluminum as slick as cheese. so that will do the job.

thanks Gary! I didn't think about mounting the back plate to wood. and I just saw a video 3 days ago where a guy did that.

Jim
Old 04-14-2022, 06:04 PM
  #52346  
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Pete, Google Images is your friend. there is a wealth of Informacion there

Jim
Saito FA40 MK3 engine - Google Search
Old 04-16-2022, 06:01 PM
  #52347  
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Jim
I looked at all the pictures. I would really like to see a detailed picture of a 40 Special. I think If I put a 50 carb on my 40 with the cam swap I would be as close as I can get to a 40 Special.

I was out flying today with the 45 that I did the cam swap on. It was spinning a 12X5 very good. I wonder why Saito didn't just use that cam in the first place.
Old 04-16-2022, 06:49 PM
  #52348  
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Hope this info is helpful.





















Last edited by Jesse Open; 04-16-2022 at 07:58 PM.
Old 04-17-2022, 04:56 AM
  #52349  
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Originally Posted by modeltronics
Jim
I looked at all the pictures. I would really like to see a detailed picture of a 40 Special. I think If I put a 50 carb on my 40 with the cam swap I would be as close as I can get to a 40 Special.

I was out flying today with the 45 that I did the cam swap on. It was spinning a 12X5 very good. I wonder why Saito didn't just use that cam in the first place.
Simple, they hadn't designed the "High Series" cam yet. Once that cam went into production they used it in every size engine from the 45 Special thru the 125 (sans the 120).

The odd fire twins used both, the older cam design and the newer high series cam, depending on which model single they were leveraged from.

Last edited by Glowgeek; 04-17-2022 at 05:01 AM.
Old 04-17-2022, 05:48 AM
  #52350  
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Originally Posted by modeltronics
Jim
I looked at all the pictures. I would really like to see a detailed picture of a 40 Special. I think If I put a 50 carb on my 40 with the cam swap I would be as close as I can get to a 40 Special.

I was out flying today with the 45 that I did the cam swap on. It was spinning a 12X5 very good. I wonder why Saito didn't just use that cam in the first place.

Peter,

I have owned a few 45 Specials but have never come across the 40 Special. The parts lists shown above are the only parts lists for both that I have on hand.
Yes, Saito was playing pretty cautious with the cam timing early on. A huge part of the charm that comes with the super-sweet, albeit low output early Saitos.

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