Remklep

Thanks Martin,

I have been looking for a methanol supplier ever since I moved to Germany a year ago.
Now I can mix the fuel for my Seidel and RCV engine myself.

Danny

Spuetz

Hi Danny,
Yes and Jörg also mixes any Fuel that you like for you. Just ask ihm. And say hi from me

invertmast

My Feedback: (23)

Alright guys, i'm looking for a radial to put in my 1/5 scale FW-190 (80" span, hoping for 23-30lb flying weight). This Seidel 7-70 is the one i am looking at the hardest b/c of its 7 cylinders and 70cc displacement.
I've read through the entire thread and it seems like the general consensus for most WWI style planes is "just do it". so i've got a few questions.

1. Will this engine power my FW-190 adequately (i like to fly "scale" speeds) between 1/2 and 3/4 throttle stick position.
2. Will Cool-Power 30%nitro Heli ( "pre-blended" Glow fuel work for this engine? I've seen the discussion over mixing fuel, but have never done so and do not know where to go to get the stuff to do it.
The cool-power heli blends are available w/ lubes between 17 and 22%. If not, what all is needed for making the correct fuel to use?

invertmast

My Feedback: (23)

Also,
what size 3-blade props are recommended?

TFF

I would think it would fly the plane at the lower end of your weight range fine; 30# might be too much for fun. 30% heli will have it throwing its rods in no time. 0-5%, or your going to melt it. More cylinders makes it have less performance; close to 7 times the internal drag as a single cylinder, and it is not tuned to be a high RPM screamer like a Saito or YS. It is one of those things that wont tolerate not doing what the instructions say, or too expensive to experiment. It would be cool in the FW though.

invertmast

My Feedback: (23)

I actually just found the manual on the net and saw that it calls for 0 to 5% nitro at most. which is easily obtainable, even FAI fuel w/ no nitro i should be able to get.. The scale size prop for a FW is 26" So if i could put a 24x10 or 26x8 on it, that would be even better.

GeeBee-RCU

My Feedback: (324)

Be carefull about amount of oil,,,it needs no more than 10% ,which is the problem we are having in getting fuel. I read that OS's new 7 cylinder will need same fuel so I'm sure someone will mix up some somewhere for us in the US??....BYRON...ARE YOU LISTINING???

Spuetz

Hi Thomas (?),

ABSOLUTELY DO NOT FLY THAT FUEL with the Seidel! It is the wrong fuel for this engine!
5% Oil - up to 8 % if you must - NO MORE! I fly 5% with full throttle the whole flight...
NO Nitro! It doesn't need it and will cause corrosion!

Cheers, Martin

abufletcher

Is there a difference between synthetic oil for 2-stroke engines and synthetic oil for 4-stroke engines? I've found my source for methanol (a guy in our club who runs an animal hospital) and think I know what oil I'll order, but it says it's for 2-stroke engines. Does that matter? What's the difference?

TFF

As long as the oil is designed to be mixed with methanol it should not matter. If it is for gas, you will run your engine if you run that mix. I am sure there is pluses for the 4 stroke stuff, but our 4 stroke model engines still rely on 2 stroke style lubrication for things like the crank and rods. The reason for no castor mix is it might gum up the exhaust valve down the road.

invertmast

My Feedback: (23)

Martin,
no worries, my earlier comment was based off of experience from previous 4 strokes. After doing some research, i see that the seidel uses very little oil and no nitro.
what are your thoughts on this flying a mid to high 20lb airplane?

invertmast

My Feedback: (23)

Could you guys tell me what the dimension is from the Prop flange to the forward most part of the cylinder head/rocker arm pushrods? I need this dimension to see if it will fit in the cowl.

GeeBee-RCU

My Feedback: (324)

Hi Tom,
I get 1-3/4 inch from prophub face to edge of rocker arm.
Hope this helps
Steve

invertmast

My Feedback: (23)

Thanks steve!

abufletcher

In terms of type of oil that would be compatible with methanol, since RC glow fuel IS methanol I would assume we're talking about the same kind of oil that is added to normal glow fuel. But just what kind that is and how I might get is separately, I have no idea.

Ordering Aerosynth-3 from Germany seems out of the question for me.

TFF

http://www.klotzlube.com/
http://www.klotzlube.com/proddetail....%5FQuart&cat=8
Just making sure you dont pick up something from the hardware store for a Weedeater.

abufletcher

Klotz fuel is sold in Japan so I assume that Klotz oil is also available. Again, are we saying that it DOESN'T MATTER that this says it's for 2-stroke engines. If the 2-stroke/4-stroke doesn't matter AND it doesn't matter whether an oil is formulated for gas or methanol, then I don't have any problem at all.

http://www.saito-mfg.com/parts-files...ine-mount.html

And this oil in the Saito website looks for all the world EXACTLY like the cans of oil available in the local hardware shop, in the automotive section. Is Saito's oil somehow magical, special beans oil?

BTW, the Japanese text doesn't really say anything useful other than that this is "high quality engine oil and that it leaves little residue in their tests."

TFF

It DOES matter if the oil is designed only for gas; designed for either methanol and/or gas usage is OK.

abufletcher

Got it. Thanks. I'll check on the Klotz and also see if I can get an answer on the Saito Racing oil.

invertmast

My Feedback: (23)

well.. my seidel arrived today, and it fits in my 1/5 FW-190 cowling perfectly! I'm glad you guys convinced me into this purchase, as it adds an entirely new "cool" factor to the project that would of been lost with the conventional "Gas 2 stroke" motor choice's. Now to spend the next few days getting the firewall, motor and cowling mounted so i can get some really cool pictures.

BobH

My Feedback: (2)

Tom, ya know I have the Sis-T FW 190. Presently I have a Saito 300 twin that fits fine. I also ordered the Seidel 7-70 so thats an option now

abufletcher

Bob, no it is NOT! You're going to put that Seidel in that WWI model where it belongs, mister!

BobH

My Feedback: (2)

I am? I mean. I am!.. i think? LOL

invertmast

My Feedback: (23)

I say put the Seidel in the Sist 190.. bob, do you have the sist 190A Spinner w/ fan you'd be interested in parting with

And a question for you seidel guys.

I found 10 gallons of Methanol from a friend. cost $25. So fuel is not a problem now. I've got an on-board glow as well. Now i need to get a prop. I would Prefer to wing a 3 blade prop. The Manual states a 24x12 or 26x8 prop as the largest size. since a 26x6 3-blade prop is near impossible to find (26" is scale diameter), i've got to go down to a 24" prop. a 24x10 is what i'm going on (using the typical rule of, remove 1" of diameter or 1" of pitch for the extra blade). On the info card included with the motor of the test run, it states a 24x8 propellor w/ a 60*c Cy. head temp and 5300 rpm. but max RPM for the engine is stated as 6300, and i was hoping for around 5900-6000rpm with the 24x10 3-blade.

Can this motor spin a 24x10 3-blade in the 5,500 to 5,900 Rpm range? If not, what prop should i look into?

Spuetz

Hi,Thomas
I fly 24/10 two blades as max size. With a three bladed I would aim for 22/10. Wouldn't reduce the pitch since you want it for speed with your war bird. So the only thing you can do is to reduce the diameter. 24/10 3 blades is definitely too big! I would try a Solo Prop! Looks very scale, like a Hamilton Standard, and you can get different size blades with different scale shapes. I would even try 21 inch blades and then experiment with the pitch. Run it up and measure the rpm. Then set the pitch so it will gve you 5800 when on the ground. That should give you 6000 to 6200 in flghtvand a pitch that's good for some warbird like speed...