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Everything Radial Engines

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Old 07-06-2012, 12:12 AM
  #3401
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Default RE: Everything Radial Engines



Radial1951,

thank you very much for the response, this will be very usefull.

I am not 100% sure there are no timing marks, I can only say that I looked carefully and could not find any which I also found surprising.
Still would love to hear from other Seidel owners to check if I'm mistaken.

With this information I can move to the next problem.

The crankshaft is supported by a large main bearing and the cam sits on a smaller bearing on the crankshaft behind this.
The intermediate gear is supported on a stud cast in the front crankcase.

My problem is that I can see no other way than to position crankshaft and cam outside of the engine and then to install the whole assembly in the crankcase.
The difficulty with this is that I have to hold the crankshaft and cam in the right position, locate the intermediate gear on its stud and all this with the crankcase hot and me pressing the whole assembly into place. It is true I guess that the intermediate gear will keep crank and cam in the right position relative to eachother but then I will have to press in the assembly from the bottom to avoid that the intermediate gear drops out of the cam.

Perhaps I'm making this too complicated, all ideas are welcome.

Marc

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Old 07-06-2012, 06:50 PM
  #3402
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Default RE: Everything Radial Engines

OK, time to jump in with both feet. I have been bit by the radial bug. I have an UMS Evolution 7-77 radial glow engine that is going into a Black Horse 91" Corsair and I just purchased a Saito FA-200 R3 radial glow engine that I plan to install in a Seagull 66" Sea Fury. I have had a lot of support on other forums for the UMS evo 7-77 and the corsair but I know very little at this point about the Saito three cylinder. I have not started either engine as yet. Any input or suggestions will be greatly appreciated.

Heli-NuBee (Roger)
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Old 07-07-2012, 06:19 AM
  #3403
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Default RE: Everything Radial Engines

Roger, Tom again! I have the Saito 90R3 in a hangar 9 corsair which is 6 years old and has over 300 flights. Well these 3 cylinder engines are pretty durable but they cannot swing large props. They are RPM engines so allow your 200 to wind up to at least 8000 rpm and it will run cooler and produce much more power. My 90 swings a 13x7 OK. Many of the 170 R3's suffered very uneven mixture to the three cylinders. One cylinder slobbery rich and another lean as hell. I hope the 200 is an improvement on this. I am fortunate that my two 90R3's run evenly on all three cylinders. Also these engines are better off if two crankcase vents are installed. All three of my saito radials I drilled and tapped the crankcase for an additional vent so at the end of the flying session I can flush out the crankcase and then add air tool oil. -Tom
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Old 07-07-2012, 11:04 AM
  #3404
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Hey Tom

Your input is always appreciated. Thanks for the heads up on the unequal cylinders. I hope they have that issue solved with the 200s. I will probably play with the Saito before I play with the Evo because it looks as though the Corsair build will be delayed due to the retract issue. I had to send the LaDo retracts back to France for evaluation.

Roger
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Old 07-07-2012, 11:19 AM
  #3405
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Default RE: Everything Radial Engines

I purchased the Microsens balanced on-board glow system for my Evolution 7-77 engine because of the balancer and using a single cell LiPo battery. However, the Saito FA-200 R3 three cylinder glow radial is a different animal. Of the three on-board glow systems available for the Saito (McDaniel, Microsens & ElectroDynamics) what are the opinions of which is best for use on the Saito?

Thanks for your input,

Roger
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Old 07-07-2012, 01:08 PM
  #3406
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Default RE: Everything Radial Engines

Hi, I use the McDaniels glow drivers on the Saito 90R3,170R3, 325R5, Technopower 7 and 9 cyl. with no cylinder drop out problems. The one issue I have with McDaniels is they are 4.8 volt only, would like to be able to use A123 or Lipo as the power supply. I do this using a regulator for the 7 and 9 cyl. since it drawls 9-10 amps.

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Old 07-07-2012, 05:05 PM
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Hey Rcten, thanks for your input. I stayed away from the McDaniels on my seven cylinder Evo for the same reasons you mentioned - ie: can't use a LiPo battery and I have also had past issues with their glow plug wires.

Roger
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Old 07-08-2012, 10:11 AM
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Hi, set the # 1 top cyl at top dead center, then position the cam to just be at the spot where the exhaust and intake lobes are moving, equal amount. then install the small gear. I got info from Seidel via a friend, did this on my 9 cyl, started right up first try.
I also had to compleately clean out the engine I got ,used, all piston rings was stuck, lots og gunk, old grease and some rust. If you buy an old run engine it may be smart to take one cylinder off and look inside. I think I posted a pic way back in this forum.
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Old 07-09-2012, 12:22 PM
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Default RE: Everything Radial Engines

Super Puma,Thanks for the response.same here, old grease & oil everywhere and all the piston rings completely stuck.Luckily no rust so the engine is fine now.I'm sure that with received info I will be able to time the engine correctly.Marc
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Old 07-09-2012, 12:29 PM
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Quote:
ORIGINAL: Heli-NuBee

OK, time to jump in with both feet. I have been bit by the radial bug. ... I just purchased a Saito FA-200 R3 radial glow engine that I plan to install in a Seagull 66" Sea Fury. I have had a lot of support on other forums for the UMS evo 7-77 and the corsair but I know very little at this point about the Saito three cylinder. I have not started either engine as yet. Any input or suggestions will be greatly appreciated.

Heli-NuBee (Roger)
*
Hi Roger, I have the EVO77 (still new), 325R5 and 200R3. There is no problem with the 200 dropping cylinders. I have mine in a 68" Su-31. The engine box had to be shortened about 25mm (1") as shown.

For on-board glow, I use a 9000mAh NiMh D-cell, popsicle stick mount with velcro seatbelt, wired through an automotive type rocker switch. A mate of mine uses a standard microswitch with a cam on a mini servo (on the Tx gear sw) to switch the glow on his OS Gemini twin. I wasn't sure about the amp draw so I went with the rocker sw idea as a starting point, works fine. I tested glow plugs at up to 2.5A so allow 3A to be on the safe side. The same rocker sw handles the R5 also. I will try a microswitch for the 200 sometime, and also have a McDaniel unit for the 325 not fitted yet.

It's funny that single cylinder engines almost never have on board glow drivers, but as soon as there are multi cylinders, we worry about one dropping out !! The 200R3 will start and run easily on 2 cyls...

I usually turn the glow off while taxiing, then back on for the flight, although often leave it off. Never dropped a cylinder. Very easy to flick start when you get the knack. I fitted a priming tube to the carby with a plug in the RH side of the fuze. A bit of fuel while giving it a few flicks, turn on the glow and it usually starts next flick. The filler is a Sullivan type on the left side next to the rocker sw in the pics.

This video was it's first outing, just ground testing and having fun. http://www.youtube.com/watch?v=-XsYDOnwnk8&feature=plcp

You will really like the 200. Love the sound...

Regards RossG
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Old 07-09-2012, 05:37 PM
  #3411
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Default RE: Everything Radial Engines

My Seagull 66" SeaFury ARF arrived today. At first glance, the airplane appears to be pretty darn good quality. I'm looking forward to the build for my Saito FA-200 R3 radial engine. Hey Radial1951, thanks for sharing. Your setup looks great. I must admit that I was a bit concerned about the chance of cylinder drop out with the 200. I have read that some folks had problems with the 170s from unbalanced cylinders, cylinders droping out and one fellow had a catostrophic failure breaking all of the rods with only seven hours of operation on the engine. I have to believe that Saito has done a lot to improve the new 200s over what the old 170s were - at least I hope so. There is not much more I can do right now on my 91" BH Corsair build with the UMS Evolution 7-77 until the retracts come back from France so I will probably get right on the SeaFury build.

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Old 07-09-2012, 05:43 PM
  #3412
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Hey Radial1951, good to hear that you are not having problems with cylinder drop out. I am still debating about which on board glow system to use. I like the options that McDaniel's offers to have glow all of the time or stick operated but I like that Micosens can use a LiPo battery that is much lighter than the 4.8 V batteries that have to be used on the McDaniel's systems. I will make a choice one of these days and place an order.

Roger
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Old 07-11-2012, 06:24 PM
  #3413
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Default RE: Everything Radial Engines

As I indicated, I sat aside my UMS Evolution 7-77 radial project while I wait for LaDo to return my retracts. So, I am now working on another radial engine project. I received my new Saito FA-200 R3 radial engine today. I am building a Seagull 66" SeaFury for this engine. I am making good progress on the plane after only two days. Wing is assembled, servos installed, linkages installed and adjusted and retracts have been installed. I changed the CA hinges to DuBro heavy duty nylon hinges because I have had a bad experience with CA hinges in the past. I also am using E-Flite electric retracts rather than the mechanical retracts that were included with the ARF. Horizon Hobby was kind enough to check the inside diameter of the cowl for me before I purchased the plane. The Saito will fit snuggly into the cowl but I did not consider the width of the engine box. The engine mounts are just a tad too wide for the engine box so it will take some modification to install the engine. Unfortunately, that will slow the build just a little. Here are some pictures:

Roger





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Old 07-12-2012, 03:02 PM
  #3414
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Default RE: Everything Radial Engines

Making a bit more progress now. Empanage is now installed and I am working on the engine mount modification.

Roger

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Old 07-13-2012, 08:20 AM
  #3415
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Default RE: Everything Radial Engines

Have all ya'll seen the Moki 257?

[youtube]http://www.youtube.com/watch?v=7RlAXoU85B8&feature=g-u-u[/youtube]
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Old 07-13-2012, 07:02 PM
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Default RE: Everything Radial Engines

Can anyone direct me to actual modeler flying experience/input pertaining to the Evolution 9-99 (9 cylinder radial)?
I have seen a few videos of them being bench run, but no actual flying nor any reports on the flight performance of this engine.
Any info would be appreciated.
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Old 07-14-2012, 04:30 AM
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Quote:
ORIGINAL: RichardGee

Can anyone direct me to actual modeler flying experience/input pertaining to the Evolution 9-99 (9 cylinder radial)?
I have seen a few videos of them being bench run, but no actual flying nor any reports on the flight performance of this engine.
Any info would be appreciated.
*
Hi Richard, Have a look here:

http://www.rcuniverse.com/forum/m_10..._1/key_/tm.htm

at the UMS EVO radial forum. A few members are flying the 9 cyl Evo engines, also plenty of 7 cyl owners too. Doesn't seem to be any "issues" with the engines...

Regards, RossG
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Old 07-14-2012, 05:54 AM
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THANKS!
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Old 07-14-2012, 04:01 PM
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Ross thanks for pointing the thread out. You beat me to helping out Richard. Richard, my 9-90 has now 70 flights on it. Please carefully read through the thread to insure your success with this engine. -Tom
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Old 07-16-2012, 02:03 PM
  #3420
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Default RE: Everything Radial Engines

Making some progress on the Saito FA-200 R3 radial engine powered Seagull 66" wing span Sea Fury.

Roger

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Old 07-16-2012, 02:20 PM
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I finally made a choice today and ordered the McDaniel's 4.8 volt pulsed on board glow system for my Saito FA-200 R3 radial engine.

Roger
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Old 07-16-2012, 04:42 PM
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Default RE: Everything Radial Engines

Here's what I'm working on. Saito 450r3 in the Ohio Models AT-6.
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Old 07-16-2012, 06:46 PM
  #3423
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Hey Steve, your project looks great. I hope you are having as much fun as I am.

Roger
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Old 07-24-2012, 05:48 PM
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The McDaniels on board glow system arrived today. That is the last item needed to get that Saito FA-200 R3 radial engine up and running. I hope to have her running within the next few days.

Roger
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Old 07-25-2012, 07:56 AM
  #3425
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A scratchbuilt 18-cylinder radial engine running on a test stand. Appears to be a model engineering show or old timers antique engine show.

[youtube]http://www.youtube.com/watch?v=aOexZOxw2HU&feature=g-vrec[/youtube]
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