Maxam

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Hey redball, two years ago I had a standoff bolt strip out of the backplate. I made a bottoming tap of the next larger size bolt that would fit through the tubes. Worked well. Let me know if this happens I can either send you the tap or send me the backplate and I can tap it out for you. -Tom

redball8

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Thanks, Tom. I'm hoping they just backed out, but will only know when I take the engine off the plane.

Heli-NuBee

Here are some pictures of my damaged UMS Evolution 7-77 radial engine powered BH Corsair.



Best wishes and good safe flying.

Heli-NuBee (AKA Roger the radial rabbit)

BobH

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My GTM Fokker DVI with the USM 7-70

slskn

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Tom what brand of fuel are you using? and did you say you were using 10% castor?

Maxam

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I use wildcat fuel. Of the 9% oil concentration, 10% of that is castor. So most of the oil (90%) is synthetic. 7.5% is nitro. -Tom

slskn

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I too am using Wildcat fuel however they won't make a mixture for me for my engine apparently you are making your own with Wildcat mixing your own?

Maxam

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Yes diluted with methanol from a nearby chemical company.

Heli-NuBee

Hi Maxam, (TOM) I have sent you a couple of PMs but I'm not sure that you have received them. This forum doesn't seem to offer the option to send an e-mail in their new format.

Heli-NuBee (AKA Roger the radial rabbit)

Maxam

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No, the new format is a disaster!

redball8

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Tom, also sent you a PM, fyi.

Heli-NuBee

OK, Maxam (Tom) Sorry for misusing this forum but I can't seem to get info to you any other way. My question is about my Saito 200 R3 radial. I have quite a few flights on this engine (probably 50 or more) and it has always run well until last week at our annual war bird event. I could not get the engine to run on all three cylinders at full throttle. It would run fine with glow support at 1/2 or less throttle and would run well for a short time at full throttle until it dropped a cylinder. I tried adjusting the high speed needle but it did not help. I am at a loss why this engine started dropping a cylinder at full throttle. Do you have any thoughts? Thanks for your input and sorry guys for using the UMS forum about my Saito.

Heli-NuBee (AKA Roger the radial rabbit)

Maxam

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OK got all the PM's answered! -Tom

Paul Grubich

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Looking for a used EVO 999 if anyone has one for sale.

Zampa

Hi everybody! Some days ago had the maiden flight of my Great planes Stearman with the evolution 7-35. The engine ran beautifully and the plane flies very scale, perfect combination!
You can see a nice video of the maiden here http://youtu.be/X8JvLRyOgK8 edited by my good friend Andrea.
Hope you like it

Maxam

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Zampa, The plane engine combo is terrific but take out the music so we can hear the plane!!! I like the way the exhaust covers the gap between the engine and the plane. -Tom Hope you get many great flights. I have been to Italy many times. A wonderful country!

Heli-NuBee

I agree with Maxam, I would much rather hear the engine and not the music.

Heli-NuBee (AKA Roger the radial rabbit)

j lauria

I am in the process of completing a Ziroli 87 in. Stearman. I have installed a UMS 9-99 and would like advice on the fuel tank choice and plumbing. I was motivated to buy the 9-99 after reading Maxam's posts and I intend to follow his advice to the letter. I would like to be able to easily drain the tank at the end of the day. With the usual 3 line system this requires standing the plane on it's nose to get all of the fuel out thru the over flow fitting.( at least the way I install them) I don't like using the available fuel fitting that insert a valve between the clunk line and the carb. I am thinking about adding a fourth line to the bottom rear of the tank strictly for defueling. Can a brass tube be safely mounted to the tank using silicone adhesive. I am thinking about using a 30 ounce tank. with separate fill, vent , carb and defuel lines. Any thoughts from anybody are most appreciated. I would like to see what Maxam uses to ease defueling.

Many thanks,
,

Maxam

My Feedback: (62)

Hi J. Thank you for your confidence. I use a 24x12 on my 9-90. A prop like this will keep the plane flying well at low throttle settings. I have been using a 24oz tank and a 30 would be great too. To keep things simple I use two clunks, one for the engine and the other to drain the tank. The third is the overflow. Keep the tank close to the firewall, top of the tank a quarter to a half inch above the carb. (not a problem with a tail dragger). Fat fuel line, fat tank aluminum tubing and a clunk with a big hole. The plastic used in these blow molded tanks is very resistant to bonding with any type of glue or sealer. Please do not put a hole in the tank! -Tom

redball8

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Yep, two clunks is the way to go ...

j lauria

I would like to use my large electric starter to start my UMS 9-99. I plan to use a 24/12 prop. Can anyone suggest a prop hub, nut or spinner that would be appropriate on an 87 in. Stearman.

cymaz

These people might help

redball8

My Feedback: (128)

If you're not competing in scale contests, a 1 1/2" TruTurn prop hub would do the trick. Will need to drill out the thick "washer" from 3/8" to 10mm - TruTurn can do this for you. Or you can order the item from Hobbylinc for a bit less, and drill it out yourself (it's only 0.5mm wider)..

Cattledog

search this site for UncleGeorge (George Jenkins) and he has a nice prop hub that will look good on your bipe....

found him: http://www.rcuniverse.com/community/...file&memid=715

Reverend

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Hey guys,

posted this in the corsair thread already. Though you might like it too

Maiden due soon...

https://www.youtube.com/watch?v=StAeuqWVcSQ rev