w8ye

My Feedback: (16)

Try 2-56

w8ye

My Feedback: (16)

Yes

akouzmit

On my 25% RV-8 it is installed side way, but while flying it is getting in all possible positions and it looks OK.
Regarding hamming I would suspect you left carb dry for a long time and membrane there become a bit less flexible.
Try to fill carb and leave it for a week then try again. If not resolved you may need carb kit replacement.
Regarding down side installation I have only one problem when priming engine and over filling combastion chamber with fuel.
On my stend I have tried FG-36 in any position and it is performing well in all of them.

orthobird

My Feedback: (1)

Update, today was the maiden of my brand new extreme flight extra 300 78" with a gas saito FG 36. The airplane and airframe is awesome. Had issues with prop, therefore, each flight was like 3 to 5 minutes long while i tested out 3 different props, and i did not like any of the props and their performance. 
The 20 x 8 mejzlik = 7000 rpm, slow flight
zinger 20 x 6 = 7600 rpm, even slower, lots of thrust, just not good enough, in my opinion for aerobatics, funny flight characteristics
master airscrew 18 x 12 nylon prop = 6700 rpm, this was best by far, much quicker, but engine was under lots of load on uplines, the engine began to die down, so i immediately cut power down and landed her, but much more quicker on level flight, i liked the airspeed with this prop, but not much thrust.

i have ordered 18 x 8 props, with this, i believe i should get 8000 rpm, and it will be a compromise of speed and thrust.

but the airframe is awesome, she would float in for landing, very agile, and perfectly balanced. did not get to do much, due to prop issues, and i wonder if this engine may not be enough for this airframe. we will see once i get the 18 x 8 props.
The airplane weighs 13.5 pounds, and i cannot see why this engine does not throw it around like a raggedy ann doll.  this engine used to be in a super decathlon that weighed 20 pounds.  So it will be interesting to see what happens when i get the 18 x 8 prop.

orthobird

My Feedback: (1)

also, how do you all have the timing sensor, in middle, all the way to right or to the left?

akouzmit

I have tested fg36 with different props for static thrust when engine installed on my 27% RV-8.
On the ground the best prop for static thrust I found is 18x8W, which is something like 19x8.5.
I have measured thrust with fish scale and read out 6.5-6.8kg. Electronic scale is sensitive to rope shrinking and expansion, thus I recorded 2 numbers: smallest and biggest.
My RV is 6.5kg W/O fuel and smoke oil, thus FG36 will not do any good verticals, but decent for mid-sport flying.
This engine is too heavy for aerobatic planes.
I recently got OS GF40 and this one is 300gr lighter and 10%-12% more powerful.
This will be good for your plane if you like4-stroke, but for aerobatic planes it is better to use 2-stroke. They are significantly lighter with equal thrust.
Try 18x8W on Saito FG-36. It is my choice for this engine.
Andrei K.

orthobird

My Feedback: (1)

Thanks Andrei, i will try it, and if it will not let me do flat spins, sommersaults, and hover, then i will have to change motor out.  best regards!!

kochj

THis is the 40cc FG and looks like it goes very well on the EF extra...
http://www.youtube.com/watch?v=tvOH0...q-COsGVDOrK6Vx



500rpm drop is significant...
That is about what 4cc extra would give you! LOL.... Except you are Losing cc's!

The engine runs great, except the cowl deal????
I wouldn't change the carb or ignition if it is running well...

Run the plane w/O the cowl !...
I would try running the saito fg36 w/o a muffler and see if you have any gain...
Run High Octane Gas and make sure you have plenty of cooling....


15lbs of thrust in a 13.5 lb plane isn't earth shattering, but it would be enough for some 3d....
In the video below, He said it was 11.5lbs but I am guessing it is 13lbs...
I believe others have ran the EF 78" extra with a 26cc engine and had good results...


Like QQ said about his 26cc and 73inch yak

"It will not climb out like a glow , but it will climb out a few clicks out under full power. It's not bad"

http://www.youtube.com/watch?v=bV3qHPU4aaU

orthobird

My Feedback: (1)

wow, saw that saito 40 on you tube, on my plane!!  mine cannot do that!!

w8ye

My Feedback: (16)

Music distracts from the flying - Cannot hear the engine

kochj

w8ye

Do you know what is the dif. between the 57cc Twin's carb and the fg36 carb??
Also, is the FG40 carb changed from the FG36 carb?

Do your FG36's burp when inverted???

Thank you.

w8ye

My Feedback: (16)

In a roll my FG36 will often "Burp" slightly hesitate. Doesn't seem to hurt anything.

I don't know about the carb differences? Often the twins will have a carb the size used on the single cylinder engine using one of the cylinders.

orthobird

My Feedback: (1)

got my new 18 x 8 CF hover prop today from valley view

kochj

Bird....
What did you find out? I think the OS 40 4stroke gas would do better in this plane... as it can use less oil in fuel and more cc's...

How much running do you have on the fg36? just curious.... I am going to use my Fg36 but in a sport plane or scale plane...not for 3d stuff....
Still may pick up the os 40fg... as it is a good deal right now... 120$ off and 50$ rebate... cheapest it will be...

Sharpeye22

Need suggestions.

I have an FG56T. It has been running just fine as late as last weekend. This weekend however, though it started just fine it is only running on one cylinder. Looking from the back of the plane the right cylinder is the only one firing. Things I have tried.

I changed the spark plug. Though wet with fuel the one I pulled out was not fouled.
I checked the valves. They are set as per spec.
I changed the fuel.
I tried retuning the carb.

any ideal what next to try?

Mustang314

My Feedback: (1)

Try swapping the plug leads. This will tell you whether you have a problem with the ignition or the engine. Next check to make sure the plug is grounded. With a continuity meter check to see that the shielding on the plug lead is grounded to the engine. I encountered the same problem on an OS 160 twin and found the the solder joint from the shielding to plug housing was broken. A quick solder job fixed it and solved the problem.
Good luck
Fred
AMA L815

Sharpeye22

Thankyou Mustand314, I did as you suggested. I have a good ground between the shielding and the engine. When I swapped the leads at 1st it ran with both cylinders then the same one as before stared missing, then it stopped firing all together, now it runs on one cylinder but every now and then the not running one will fire for a short burst then stop firing again. At ideal it seems to be firing for that cylinder will heat up but not near as hot as the one that is firing.

I am thinking that the ignition modual is not producing enough spark to fire both cylinders at full throttle and just a weak spark for the left cylinder at ideal.

Do you have any other suggestions or thoughts?

Rudolph Hart

How rich have you tried running it ?

Mustang314

My Feedback: (1)

After determining that both my leads were making ground, I still had a problem with one plug lead. After digging around in my miscellaneous junk box, I found some spring inserts for the plug covers. Installing them solved the problem. They really lock the ignition leads to the plug securely. Before installing the springs, one lead was not making a secure connection to the plug and could be wiggled easily though not unlock or vibrate off. I think that the looseness creating an intermittent ground resulting in a miss in that cylinder.
Unfortunately, I cannot remember where I purchased them. I think it was from a retailer that handled RCEXL products however, I have not been able to find them by Googling.
PM, if you wish, your email address and I can send you photos of the springs
Fred

seldredg

I just got my first gas plane, a used 82-inch Bee Gee with a DLE 30 on it. I'm going to start with the existing setup, but would like to change to a 4-stroke engine in the near future.

How does the power of the Saito FG-30 compare to the DLE 30? I saw a spec saying the DLE 30 was 3.7 hp at 8500 rpm (don't know what prop). On the Bee Gee, the engine does 7100 rpm with a 20x6 static. (And this didn't vary much from 3/4 to full throttle).

I'm not a high speed flyer, but want enough power for the basic aerobatics. An FG-30 would fit in without having to relocate anything. An FG-40 is more $$ and would require moving the batteries,ignition, etc.

patrnflyr

My Feedback: (7)

I just had a Carl Goldberg Sukhoi ARF given to me NIB and was thinking of a Saito four stroke gasser. My original Sukhoi kit had a Saito 180 glow decades ago. Flew very well and we started with a 120, then 150 and finally 180. Well, I've moved on to 40% gassers and can't remember much more about it except a big one piece wing, crappy gear mount and no access to the insides while wing was on. Debating between the FG40 and an FG30. I have bigger planes to knock around everywhere. Just want a nice nostalgic plane to remind of my early IMAC days. Which motor would you go with? There's 12 oz difference and about 3" prop clearance difference around that big round cowl. I do have a Top Flite GS ARF P-47 with the Saito 60 radial that I love so using a different fuel mixture isn't a problem. Any advice would be greatly appreciated.

akouzmit

40cc 4-stroke gas engine is equal in power-thrust to 33cc 2-stroke engine.
Keeping this 1.21 ratio in mind you can see that 30cc 4-stroke gas engine is equal to 24cc 2-stroke gas engine.
If you have to select between 30cc and 40cc SAITO gas engines go for 40cc one.
It has better weight to power ratio.

seldredg

Thank you. I can work with those numbers also.

G T

hi all
i am trying to find a couple of new "Saito FG21 carburetors" ... can any body advise who may have these items available ?

the pope

Have u tried hobbyheadquaters ? There the Aus importers of Saito . If its to replace the carbs on the FG20 ( at one stage I think ) they were replacing them for free so if thats the case u could explore that further . HHQ wont sell directly to u but at least u can establish whether there in Aus. and then u will have to order through a hobbyshop and I think HHQ now have a online shop so that may work or horizon in the USA but I presume u have tried there ! Cheers