Hello82

Good job warbird racer ! that was much needed here for all this info.

I'm just starting to get a handle on my new first Moki 150.

koenvlieg

Hello,

Biela has now a new semi scale propellor for the fw 190 : 32*14 for the 215 moki, 32*16 for the 250 moki
So my question is for the 32*14 : they always tell that for this kind of engines it's necesary to use *16 or more, to have thrust at lower rpm. Is this prop not too big ? At the moment I have a sep 29*16 3 bl in use.
They tell that it's made for the moki 215 but they only give facts with a zdz 220 : 5000 rpm and 33 kg thrust.
Has anybody used such kinds of props on the 215/250 ?

Fg,

Koen

Straightleg

Koen, I have written about this earlier in this thread !


/straightleg

wingspar

My Feedback: (3)

Has anybody tried or used a velocity stack on these engines. Any benifits?

dave

JSZ

My Feedback: (73)

Great thred but without having to go through the entire thing again, whats the best lube for the rockers?

Mk23socom

My Feedback: (7)

I have read and re-read this thread and there are a few methods to the madness that is the rockers. I can remember a few guys recommending White Lithium grease in the spray can variety and another that I liked was chainsaw bar oil. I have gobs of experience with bar oil and the viscosity is said to allow the oil to stay put and not be slung all about inside the cowl. I never would have thought of it but it makes sense, chains whip around the end of the bar with a viscious ferocity and the lube stays pretty well and if everything is tuned right, you dont use up a whole lot of the oil. I have used the Lithium grease on other projects such as door hinges and things like that and it stands up very well to weather. A few guys also said they used the 3 in 1 or air tool type oils with luck, I would guess that they had to re-apply a little more often as airtool oil and 3 n 1 oils are quite thin. Hope those helped! :-)

WR450

My Feedback: (66)

Doe's anyone know how much lub grease goe's in the frt, case on the moki 215, the booklet I have say to service ever 50hrs. but nothing about how much to refill the case.Also anyone selling a 215 moki?
Thanks wr450

Jaketab

My Feedback: (2)

Hello,

Regarding fuel tank size for a Moki 250. I plan flying 12-15 minutes per flight, at 1/2 to 2/3 throttle, with some reserve.
What size would you experienced Moki pilots recommend?????

Thanks - Jaketab

Scott Prossen

Jaketab,

I run about the same except myy flights are 9 to 10 minutes and I use slightly less than half of a 64 oz tank. Say 3 oz per minute and you'll be fine!

Give us some pictures of your project???

Scott

Jaketab

My Feedback: (2)

Scott,

I'm building an Airworld, Gee Bee R3 to go with the Moki. Purchased from Vogelsang. Pictures limited at this time, but here is one of the fuse and a stock completed R3. May start a build thread asking for help. This plane is a step up for me over the typical giant scale ARF and may be beyond my build experience. Will need all help I can get.

If I could revise my orginal question, would a 50oz tank give 12 minutes of hard flying with safe reserve????

Thanks - Jaketab

mogman

Anybody flying a 400? What size tank are you using. I will be looking for 10-15 mins. of flight time......hopefully this summer

Cheers,
Dave.

fifou313

Hello Guys.
I have a little question.
I have a 250 Moki and I have buy a 4 blades soloprop. I have read tha a good set up will be a 30*14 for this prop.
Can anyone can confirm it?
Thanks a lot.
best regards.
Fifou

Straightleg

Hello Fifou !

Regarding Solo, the pitch is not easy to set exact. By this reason,I use another approach,depending on prop size and aircraft. I find the RPM where my solo prop perform best. In your case, I will recommend a rpm between 3500-4000

/straigthleg

Scott Prossen

Jake,
Yes I do think the 50 would cover you. Anyone else out there confirm that or have a different thought? My experience says you'll be good with the 50 oz. Definitely do a build thread and you will be amazed at the quality and quantity of help you get. I had heard that lots of mods were required for that airframe when hanging a 400 on the nose. Hmmm wonder if any of those need to be made for the 250???

Dave,
Good to hear from you. How's your project coming along? For my 400 in the big Thunderbolt we decided on used tanks out of a Ford Pinto! Can't wait to see you in Fall buddy.

Fifou,
Straightleg gives the best answer to approach the prop setting of course. I run the lower rpm end of the scale on a 250 in a Wildcat. It's a 3 blade Solo 30" set to 17.5" pitch and it gives a great scale speed range and the engine loves it. I would guess that somewhere in the 30x12 to 30 x14 is a good place to start.

Good luck guys. Thanks for breathing life back into the thread...it's been a while!

Scott

JPate147

I have a Solo 32 inch (carbon fiber from Carf) three blade on my 250 and it has about 14 inches of pitch. I just don't know if there is any difference between the wooden blades from Solo and the CF ones from Carf. As stated earlier - it is difficult to know exactly what pitch you have on the blades. Just use your tach and be prepared for an afetrnoon of tinkering to get it right. I put a small dot on my hub with a Sharpie pen to mark the final results so I can get it the same each time I have to remove the cowl.

germrb

My Feedback: (3)

Scott,
I agree with you, its good to see the thread come alive again. Spring must be 'round the corner.
You can help with some information. I had planned to build a 33% Lavochkin La-7 this winter with a 250 raidial, but things didn't quite come together. I have a set of David Anderson's 1/4 scale plans from RCM. I'm considering building it with a 150 radial. Here's where you can help. Your Yak with the 150 is about the same size.
1. What's your all up weight (dry)?
2. Any problem with 150 power? I'm at 4300' so it requires a bit more than usual.
3. What's you wing loading?
4. Whose retracts?
5. Did you get a long kit for the Yak? Precision Kit Cutters has an La-7 in 25%.
6. Any cowl problems at 25%?

Thanks,

Scott Prossen

Hey Bob,

First let me say that it was a Yak11. I lost (crashed) that plane practicing for Top Gun about this time two years ago. The plane weighed 52 lbs as I recall and flew like it was on rails. Plenty of power without a doubt! I love that engine and currently fly it in my 54lbs Meister P-47. The retracts came with thhe kit from Fiber Classics in Germany. A guess would be that they were Wabo gear...not sure??? I did not like the design. There was a bad weak spot and the gear had to be continually removed and tweaked to stay in working order. Don't get me wrong, Wabo is great stuff. It's just that the gear were made in a scale way that didn't work all that well when shrunk down. The Kit from FC was all composite and the cowl had no issues whatsoever!

Keep me posted on your project. I would be very interested in a 1/3 La-7. Sounds cool.

Scott

mick15

Nice to see you still breathing Scott! I suppose I won't be seeing you at Cosford this year?

regards m

Scott Prossen

Hey Mick same back at you! I will not be over there this summer. Too much going on with the business and family to make it. I really had a fantastic time in your country and seeing all you guys was the best part! How about you guys come over for Top Gun or Monster Planes?????????? Been working on a little P47 and a Moki400 combo.

Take care buddy,
Scott

mick15

I'll have to think about that. There is a short video of the SeaFury on the front page of the LMA site, there is a glimps of the big bad Prossen!

m


Here tis


http://www.youtube.com/watch?v=2UZpBD0Rzpg

Scott Prossen

Oh yeah! I remember the guy with the speedy Corsair that I accidentally punched in the face/nose. What a great way to introduce myself to all my buddies in the UK![:@]

Thanks Mick,
Big Bad Prossen

Mk23socom

My Feedback: (7)

I've never known Scott to pull punches.. I cant fathom that being an accident.. what a jerk! ;-)

kochj

I am looking into the gas radials....
Is there as big as dif. between the 215 and the 250cc radial moki's as there seems to be?
Is it like comparing a 110cc twin and 150cc twin 2-stroke gas engine??

Vampire

My Feedback: (2)

Hi Scott,

It has been a while since we last spoke and in the mean time I have progressed well on my 27% Seversky P-35 project (predecessor to the P-47) for MOKI 215/250 power. Per our discussion there is always folks like ourselves looking for alternative airframes for MOKI power plants and so I thought this was a good time to share just a few pics. The Wings, tail group and retract design have been completed and the retracts have been contracted out for fabrication at present. Fuselage will be underway in the next week or 2. The e design was done in CAD so all parts are Laser cut. The retracts are prototypical in that they are electric using a single lift drive to raise both gears. The reliability is expected to be very very good and repeatable over air systems.

I will be posting more in a dedicated thread in the Warbirds forum in the very near future when the prototype is nearing completion.

Anyone wanting more info PLEASE SEND ME a PM and I will respond as I do not wish to impose upon this excellent thread which is intended for advise to MOKI ENGINE owners / users. Thank you.

Best Regards Scott and let us see more of your MOKI 400 powered P-47 when you can.

Kerry S.

Scott Prossen

kochj,

Great question about the 215 and 250. IMO I no longer see an advantage to buying the 215. Originally there was a wait and see the 250 "prove itself" feeling out there. Well I can tell you as an owner of a couple of each of these engines they don't need to prove anymore to me. I love them all. So, being that they are solid choices and only a couple dollars divide them I would always buy the 250. Although only 35cc's more it seems to breath life into the engine beyond the 35cc's! The 250 will fly more planes than the 215 will so resale and re-use has more options too. You can always throttle back if the 250 has more power than needed. All the models fitted with Moki's that I've flown/fly are cruising around 1/3 to 2/3 throttle anyhow.

Size, shape, mount, and weight differences are almost non existent. IMO.....250 all the way.

Keep us posted and good luck to you,

Scott