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Everything Radial Engines

Old 11-24-2008, 06:37 PM
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Default RE: Everything Radial Engines

Does anybody have any actual experience with an OS FR5-300 radial please? Specifically after rpm/prop experiences so I have some idea what I can expect to get out of mine.
Still in run in, using a 20x10 cut to 18", seeing a reliable 7200rpm on 10% nitro and synthetic oil. The OS site lists practical rpm range as 1800-8500. Didn't have any props closer to use. Proposing to go to a 20x8 for flying, in a 97" GEE BEE Y.
thanks,
jp
Old 11-29-2008, 10:10 AM
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Default RE: Everything Radial Engines

ORIGINAL: jp928

Does anybody have any actual experience with an OS FR5-300 radial please? Specifically after rpm/prop experiences so I have some idea what I can expect to get out of mine.
Still in run in, using a 20x10 cut to 18", seeing a reliable 7200rpm on 10% nitro and synthetic oil. The OS site lists practical rpm range as 1800-8500. Didn't have any props closer to use. Proposing to go to a 20x8 for flying, in a 97" GEE BEE Y.
thanks,
jp
jp928, I have a little question for you. I just received my new OS radial, and while I was studying everything inside the BIG box, I noticed that the instruction manual (page 15, paragraph "lubrication", and again on page 22) mentions a "breather nipple" that should be installed on the side of the crankcase. I checked the engine very carefully, but I only found the drain nipple on the bottom of the case. I'm almost sure that the nipple mentioned in the instruction manual is an error, but, just to be sure, could you tell me if your engine has another nipple in addition to the drain one at the bottom?

By the way, I haven't been able to run my engine (yet), so I can't answer your question about props and rpm, but included with my engine was a german translation of the instruction manual that reports the following prop - rpm chart (fuel with 10% nitroand 20% oil):

Prop - RPM
450 x 250 mm (18x10) 7500 - 7800
450 x 300 mm (18x12) 6600 - 6900
450 x 350 mm (18x14) 6200 - 6400
500 x 200 mm (20x8) - 7300 - 7600
500 x 250 mm (20x10) 6500 - 6700

Looks like some more run time and maybe a real 18x10 prop could produce the listed 7500 - 7800 rpm on your engine.

Radial.
Old 11-29-2008, 03:25 PM
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Default RE: Everything Radial Engines

Is there an aftermarket motor mount available for the Saito 325R ? Anyone custom building them for radials ?
Old 11-30-2008, 09:25 AM
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Default RE: Everything Radial Engines

extra-nut....

I've only seen and I'm using the orig. 2 piece mount that comes with the 325R


- Clutch
Old 11-30-2008, 12:23 PM
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Default RE: Everything Radial Engines

Clutch Cargo! omg, that name just brought back a bunch of memories.
Old 11-30-2008, 01:26 PM
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Default RE: Everything Radial Engines

Thanks Clutch, I screwd mine up trying to modify it. Now I find out there $65 + shipping!![X(]
If I can't find an aftermarket one, I guess I'll have to tig one up. These pigs could use some weight taken off anyway. I have found some good pics to go by. Robart has a really good looking mount. Much closer to scale. By the way, I posted a video this morning of my Saito 170r3. It was taken yesterday at the flying field. ENJOY!! http://www.youtube.com/watch?v=uUAAWnQyZhY
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Old 11-30-2008, 05:51 PM
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Default RE: Everything Radial Engines

extra-nut..... great sounding Radial in that SU 31 !


Kmot, this vid is for you....LOL....

http://www.youtube.com/watch?v=hBzkNchB0p0


-Clutch
Old 11-30-2008, 06:01 PM
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Haha, cool man! Thanks!
Old 11-30-2008, 09:44 PM
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Default RE: Everything Radial Engines

I just picked up a Saito 325. I am curious what nitro % everyone has used. The manual gives fuel consumption based on 10% nitro. I am just curious if everyone is using 10% or 15%. Also what size tanks are you using? Any tricks or info to know about this engine? Thanks!
Old 12-01-2008, 12:33 AM
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Default RE: Everything Radial Engines

Radial,
Thanks for those numbers, seems like we are in the ball park -saw 7300 yesterday. Seem to have a slight problem dropping No 2 cylinder will change that plug and see how it behaves. No, I couldnt find the side nipple either, just the bottom breather....
Have you bitten the bullet and got a plug lighter from electrodynamics? I think you will find its a must.
thanks,
jp
Old 12-01-2008, 02:55 AM
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Default RE: Everything Radial Engines

Actually, I was thinking of building my own glow plug driver. I've already done this for my Saito 90-TS and it works fine.
The only problem is that in order to light 5 plugs at a time, one needs about 15 Amps (!) of current, so, for this radial, I'll be forced to use some very heavy wiring to handle the current load on the return line.

By the way, about your engine dropping a cylinder, if you haven't done so already, check the valve clearances. I don't know if that will help, but for sure it won't hurt.

Radial.
Old 12-01-2008, 09:23 PM
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Default RE: Everything Radial Engines

Radial, I will do that check and see whats what. I have the electrodynamics plug lighter. It has a 9AH Nimh single cell feeding it, with the OS leads at the engine end. I have used at least 70-80cm leads from the battery to the unit and the engine earth, as this is the sort of length it will have when installed (for balance reasons), but they are 3mm core copper, and seem to do the job - Can hand start it after 3-4 turns of choking.It will start on a starter motor without choking fairly well too.
thanks,
jp
Old 12-02-2008, 02:21 AM
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Default RE: Everything Radial Engines

Thank you for the information about the wiring being able to take the current load
I plan on using about 10 AA size Nimh cells with 2500 mAh each wired in parallel for a total of 25 Ah (!!!), as I've seen with the Saito twin that two such cells per plug seem to be just about right. If I discover that I actually need less capacity than that, it'll be fairly easy to reduce the number of cells.

Radial.
Old 12-02-2008, 08:21 PM
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Default RE: Everything Radial Engines

am looking to buy a Saito 90 radial for Hangar9 60 Camel.....I dont have any experience with radials, but single cylinder saitos have a few....any advice or recommendations?
Old 12-02-2008, 08:27 PM
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Default RE: Everything Radial Engines

Be sure and put it on straight because they draw a lot of attention
Old 12-03-2008, 12:54 PM
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Default RE: Everything Radial Engines

I had a Saito 90 r3 on my 60 size Corsair , the Saito is a good machine , and flew it fine and reliable. I sold it , but i should not have done so! I missed a bit more power from it. Cool sound anyway , your Camel will probably fit the engine well , good luck!
Old 12-03-2008, 01:22 PM
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Default RE: Everything Radial Engines

I presume 3cyl onboard glow, with its own battery? how bout exhaust? just the flexible pipes?
Old 12-03-2008, 03:06 PM
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Default RE: Everything Radial Engines

It ran fine without onboard glow battery , just be sure to set the idle needle correct ( as lean as possible).
I soldered cupper pipes to the short pipes , plunger type cupper pipes.
Old 12-05-2008, 04:25 PM
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Default RE: Everything Radial Engines

R.C. wrote;
Can anyone provide me with a manual or a copy of the operating manual for a SEIDEL ST 540? I purchased this engine years ago from Proctor and it hase stayed on it aluminum display mount in a glass curio and over the years and several moves the instructions have gone elseware. I'm retired now and I have time to mess with it and I want to see and hear it run, maybe even fly it once or twice.
Talked to Mike at Ziroli and the adds you see in the mags are just print, Mike says Seidel won't even answer inquires and suggested I come here for help. This engine is the 1st eddition engine series that Seidel introduced in this country. It is serial N0 # 128, and I understand that less than 500 were built and sold world wide.
Before anyone asks, No it is not for sale.
Let's keep 'em Flying!!!
U-Bird
Old 12-05-2008, 04:47 PM
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Default RE: Everything Radial Engines

Cool

Found a video of the saito 5 cylinder in the CMPro 50cc Zero
http://www.youtube.com/watch?v=ulL3j3vZzNA

http://www.youtube.com/watch?v=juMi89NPbBA

http://www.youtube.com/watch?v=V_UCFX2a3Pg
Old 12-05-2008, 09:46 PM
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Default RE: Everything Radial Engines


ORIGINAL: U-Bird
Can anyone provide me with a manual or a copy of the operating manual for a SEIDEL ST 540?
I would say to look up Steve and ask reeeeaaaall nice
Old 12-05-2008, 10:45 PM
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Default RE: Everything Radial Engines

You don't have to ask me THAT nicely... LOL
I have the PDF of the Seidel Manual, but it was first graciously donated to me by Spuetz about 18 months ago. Just PM me and I will forward it over.


kiosk Regarding the exhaust ring for the Saito 90, Keleo Creations makes a beautiful exhaust ring for the Saitos (and many many others as well). Here is a link to his site...
http://www.keleo-creations.com/index.php?cPath=24_58
I can't see the 90 sized ring listed any more. Hmmmm... Send Kelvin an email and ask if they are still available. His price point was about $90-$110.
Old 12-10-2008, 12:47 PM
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Default RE: Everything Radial Engines

thanks....I ordered the 170 actually for a GP Stearman, should receive in couple days. what fuel you guys run on these? I used castrol mixes in previous saitos but dont think really needs it according to manuf spec...also ordered the Keleo ring exhaust for it
Old 12-10-2008, 03:44 PM
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Default RE: Everything Radial Engines

Hi YESS, and Saito 325/5
in KMP September Fury:

http://www.youtube.com/watch?v=e7U95...eature=channel

http://www.youtube.com/watch?v=VcEgO...eature=channel

and in FW 190:
http://www.youtube.com/watch?v=6tKns...eature=channel

NEW PROJECT: GEE BEE Y 97 pac aircraft yello black built by FB-model with Saito 450 Radial 3,
video Saito 450 Radial 3:

http://www.youtube.com/watch?v=UkvFUEQeXcY

Its going to snow very much that winter, so i have plenty of time for building; soon will be ready for take of; we are also flying in winter with skis;
Nice greatings from Salzburg, Austria mfc-lungau.at
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Old 12-10-2008, 03:54 PM
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Default RE: Everything Radial Engines

Hi, i hab also a question to Seidel and got prompt answer, just try it;


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