marvair

I start mine with this. It works fine.
Elektrische starter voor motoren tot 80cc

jagdpanther9

i have used this starter, the TOC Roto Terminator Starter for 20-80cc with a 3 call 2800mah battery and have been amazed at just how well it has worked . for 70 dollars i couldnt ask for a better starter here is a link to ebay,

https://www.ebay.com/itm/TOC-Roto-Te...P4DjCYe0rsekcA

DH71TIGER

Thanks Jag ............... looks the same as the one suggested by marvair.

Is anybody using the Sullivan S651 Starter to start a FG-90 R3 ? ? ? ................. PLEASE.

Andrew

HiCurrent

The fg90 ignition module has a line for the tach. Will the dla tach work ?
Thanks

SWORDSN

My Feedback: (13)

I'm using one on my fg60, a DLE one

HiCurrent

Hi guys:
My FG90 is still new. I only had less than 1 gallon of 15:1 oil mix and I'm still running the engine with it. I am using the mezlik 24x10 2 blades. My high speed needle valve is at 4.5 turns. The temperature outdoor was about 80F.
No cowl:
1. My engine was running at 250 degrees F at full RPM for less than 1 minute. The initial RPM was 6500 and was slowly going down to 6200RPM.
2. At half throttle (4300RPM) temperature was 190F
3. Attempted to rich out the high speed needle valve didn't really help, unless it was really rich like in the break in period.

With cowl and no baffle:
It was pretty much the same as no cowl, may be a little bit worse

With cowl and baffle:
The max temp I was with full throttle for less than 1 minute was about 220F.

My question is:
1. what prop are you using.
2. what temperature are you seeing with the cowl on and off
3. Are you baffling the engine. If yes, please show picture
Thanks for your help.

jimkron

These engines need to be baffled. What plane is it in? Are those temps on the ground or in the air?
I have a TopRcModel Zero running a FG 84. Keleo exhaust. Baffles around each cylinder...slightly behind the center-line of cylinder. The baffles should be tight to cylinders and heat sink...within a 1/8" .
My temps are in the 220f range in the air depending on the weather. Those engines can take temps in the 240 range for 15 seconds or so to be safe. I would worry about anything over 250. These are full throttle numbers. As rpm drops to 5000 or so, the temps should reduce to the 200-220 range. What you don't want is 240, 250, 260, 270, etc when you come off throttle. I don't have any pics but try Google or Youtube for ideas. On my 93" Zero, I also opened up the cowl flaps to get more hot air out the back. This really helped as much as anything.

best,

jim

HiCurrent

The engine is in the TopRC FW190. I have not flown the plane yet. Still checking out the engine on the ground. The temperature reading on the ground scared me. I just wanted to make sure my temperature is in line as everyone else before I take it up. I don't want to cook the engine in midair.
The cowl on the zero has more opening for the exit air than the FW190.

jimkron

The lack of exit air concerns me. Not sure what you can do to improve that. You should consider some telemetry for monitoring temps in the air. YET, others have flown the Saito in the FW 190 with success. I've seen several videos on Youtube. Sounds awesome with plenty of power.

This one looks like it has a fan attached to the back of the prop to improve air flow. I believe the original full scale FW 190 was air cooled with a similar fan set-up.
I would call USA distributor Mike at caimandist.com for advice on the proper setup for the Saito.

I've been thinking about the same combo. Hope Mike can help.

jim

HiCurrent

Buy the engine from tower. You get better deal

ForcesR

Fan for the FG90R3.

Carlo Vangompel

Hi guys,

I also have a FG-90R3 and am running it in for the moment.
I am turning a 24x12 wooden prop and have 6000rpm on the ground.
Temperatures on the cylinders are about 170°F
For the moment I ran about 1 Gallon of fuel 1:20
The motor still is running little rich and picks up very smooth, it runs very good at idle and at max. rpm but ad mid range it struggles a bit.
Next job will be readjusting the valves and checking the opening on the spark plug.
I also understand this motor needs to be baffled.
But when using a fan, is baffling still recomanded?

Carlo

ForcesR

Yes, I have the fan installed and my FG90R3 is baffled too. Keeping the engine as cool as possible leads to longevity of an expensive engine.

Roger

Carlo Vangompel

Hi Roger,

What angle do you have on the blades of the fan?
Is the fan made out of aluminium or plastic?

Carlo

ForcesR

Hello Carlo, I purchased the fan from Reverend out of Austria. He 3D prints them from BDP material and I believe the blade angle is approximately 6 degrees.

Roger

Carlo Vangompel

Thanks for the info Roger, I really appreciate.
I will try to get more info about the fan and make it myself.

Carlo

cathurga

Hi All,

Usually posting in the FG60 thread, but mate and I flew his H9 Corsair with FG90 in. It has the Morris Minimotors timing mod, but is fairly new, with only 4-5 flights on it now. We are in Dubai, so ambient temps here are VERY HIGH in the summer and the plane got up to 170C, which is too hot, but it flew ok, just came off thr throttle a lot to cool it. Temps come down very quickly off throttle. Still some more tweaking to do, but it runs well and sounds great.


Running a Falcon 24x12 prop. Static rpm was around 5500rpm but sensor was erratic so not 100% clear.

hpergm

Just copying a link from another thread related to a 97" Gee Bee Y with an FG90 featuring the Meier ring:
http://www.rcuniverse.com/forum/12539463-post78.html

Engine has been run vertically in as per previous posts in this thread. Temps are between 90 and 165C (temp probes on back side of cylinder heads) and +/-5C max between cylinders. Prop is a 24x12 @ 5800 static, unloading to 6000 in the air.

cathurga

Hey All,

It looks like I am going to have a Saito brand collector ring for the FG90 (or FG84 apparently) that is surplus to requirements. It is NIB, never been used and still in the original packet and a box. If anyone is interested, let me know. I will be selling it for at least 20% cheaper than what they go for.

Its this one..

https://www.hobbyplastic.co.uk/index...ducts_id=12461

Let me know if anyone is interested.

Andy

SJN

Had a midair collision between my Yak, and a Zlin, and suffered a little engine damage.

After checking the engine for damage, luckily it only needs 2 intake pipes, and a new set of exhaust flex pipes, and re-install the plastic cover on the ignition box. And the plastic fuel inlet nipple broke off my carb........cant seem to find a spare one. I bet you need to order a complete new carb.

Saito spares are pretty pricey it seems :-)
100 dollars a piece for an intake pipe.....yikes.....worst price I found was 140$
Anybody happen to have any lying around gathering dust ? :-)

ForcesR

SJN, the FG90R3 has a Walbro WYD carburetor and the fuel nipple can be purchased separately through Walbro. Just search the Walbro web site for a parts list for the WYD carburetor.

http://www.bennettbuilt.com/shop/Car...t_Fitting.html

Roger

cathurga

Ouch! Youre lucky to get away with that little damage to the engine. But it appears these Saito's can take a hit!
You may find that the ignition has some damage internally, the IC's can be damaged by a heavy knock, hopefully yours will be OK. Try RCJapan for spare parts, they are quite reasonable. Or IshiiMokei, althoug both of them you cannot click & shop, you have to email them for pricing. RCJapan just shove it all in a cart and submit to them with your address and they will be back to you within 24 hours with a price and shipping.

As mentioned, the carb parts are available and I know that IshiiMokei can get them, if you get stuck with the other info that was offered.

The exhaust pipes are ridiculously expensive....if you are going to pay that sort of money, go with a collector ring. You will prefer the sound they make! BTW, a few posts above....I have a Saito branded collector ring for sale.

Regards

SJN

Thanks guys.

I contacted https://www.topmodel.fr/en/ in France where I bought the engine a few years ago, and got very quick replys with the best prices.
55 euro for each intake pipe, and 160 euro for the exhaust set with the 3 pipes. Cant find better prices online.

Thanks for the offer for the collector ring, but I have been flying at a few meets where others have had the collector, and most people come over to my plane and ask whats it it, as it sounds better than the other one with the collector :-) Its just 2 different sounds.

Heres a video a few weeks back. The FW-190 has a collector ring. I think it sounds great too. But he came over to me after the flight and asked me what prop I had on, because he could not keep up with my yak, even though my yak is 5 kg`s heavier, and larger wingspan. He did have much better vertical with the FW-190 ofcourse

cathurga

SJN,
Interesting, each to their own I suppose, but I have alsways preferred the deep sound of the collectors. What prop were you using on your Yak? In that video, it sounded like someones prop tips were going 'supersonic'....

For that sort of money, look at the Meier ring. He has a really nice sounding ring that he sells for around Eur180 or so, which is really good...when you look at the cost of the stock pipes.
In the video of the corsair above, he is using the Keleo Ring and a 24x12 prop. It likes the pitch of the 24x12....and it doesn't over rev. I will ask my mate who owns it, if he wants to get rid of the stock pipes, he doesnt like them :-)

Regards

SJN

Yes, my 24x10 hobbyking aerostar prop was ripping.
Will try a 24x12 next time.

The Meier exhaust look good.
Have not seen them.
https://www.meier-ringschalldaempfer.com/