Orion09

My Feedback: (1)

The pushrods on the 777 are 56.4 mm.

reyn3545

Can't you order some tube stock, cut it to length, and use the ends that you already have? I thought I read somewhere in here where someone had done that.

Pete Bergstrom

There is plenty of adjustment in the tappet screws to cover any discrepancies. Yes, the 777 pushrods will work fine on the 770.

Pete

Pull Up Now!

My Feedback: (3)

I agree, JB won't work. What's needed are some precision, pressfit steel rings around all the ends as reinforcement. You'd need a lathe to make parts like that. I do think the replacement Evo777 pushrods will work for your 770 though. I measured the lengths of 10 of mine. They range from a low of 56.74mm to a high of 57.11mm. That's a difference of .014". Not much. At 57.4mm, your pushrod is no more than .011" (inches) longer than my longest pushrod. That's probably not much more than 1 turn of the tappet adjustment screw.

redball8

My Feedback: (128)

Thanks, guys. Sounds like a few new pushrods are in my future!

Dad_Roman

Yea....thats a bit disturbing for me. Just have to keep a close eye on mine.

Linkan2

Hello everyone
over time, I have bought some parts, if dropping a push rod when you go to the field.
I have some with me out.
It takes a long time to get home parts to Sweden.
so my tip buy home parts til your radial engines.
it is so sad to go home without getting fly
Lars

Maxam

My Feedback: (62)

As inexpensive as they are, get a bunch! Also, inspect the cam followers at the end that rides on the cams. Some of mine lost the polish and pitted. It is nice they are supplied with the pushrods! -Tom

wingart

Hi Guys
I have a evo 7-77cc.
I am just about to fit the engine in my 50 to 60 cc yak 55.
I needed to move the engine forward 32mm and have had turned up out of aircraft grade alloy some stand offs, they measure 32mm long by 25mm diameter.
While reading the owners manual looking for how far back I can mount my fuel tank I notice they say do not use stand offs as the vibration will damage the back mounting plate and the engine will detach from the model.
Are any of you guys using stand offs? the stand offs at 25mm diameter do have a good surface area to spread the load. Or do I have to make up a solid firewall 32mm thick it will weight a lot!!!!
Also they say that the fuel tank can only be mounted 100mm away from the carb?i need atleast140 to fit the tank in the right position.
How far back are your tanks ?
Many thanks Steve

redball8

My Feedback: (128)

I usually make standoffs out of hardwood or plywood - 32mm would be 1-1/4", so not too heavy? With the three-bolt pattern of a 777 might be easiest to glue up a piece of 1/2" and 3/4", then saw & sand it to a shape similar to the mounting flange. A couple of coats of epoxy and you're ready to go!

wingart

Hi Redball
Many thanks for the input, will give it a look.
rgds Steve

Orion09

My Feedback: (1)

This worked for me,mounting the engine to ply and using standoffs between the firewall and the ply.The front of my tank is 230mm behind the carb and it works fine.

wingart

Hi Orion
Many thanks for the photo. Looks great.
Iam pleased about the tank position this has saved me a big headache.
Thanks again Steve

redball8

My Feedback: (128)

Just checked the CG on my Giant Telemaster, fitted with UMS Seidel 990. Measured CG was within 1/8" of calculated value; all-up weight 36#. Ready for break-in, weather permitting!

Cristian2fast4you

Hi Wingart,

Here is how I done the spacer for H9 Corsair.

Dad_Roman

Most small airports have at least 100LL. Slightly larger ones still have 110LL.


(sorry Im a month behind)

SWORDSN

My Feedback: (13)

Better late than never!

j lauria

I am afraid that Dad Roman is correct. I have tried every available solvent. The best I can do is soften it somewhat and carefully scrape it off.

I like using masks cut by the computer controlled vinyl cutter. Previously I cut them myself from low tack shelf paper. The large circles in particular are much more accurately done by the computer controlled device. Any advice on a suitable material with a lower tack adhesive? I would never again try the commonly available vinyl, presently used for graphics, as a mask.

redball8

My Feedback: (128)

I cut masks myself from Frisket - old school, but it works!

Dad_Roman

Yea...I have a lot of background in fighting adhesive

Anything stronger than a general solvent will start to melt the paint itself.....ouch.

I used 6inch silicone tape, but this is a roll like ductape so its not cuttable on a plotter/cutter. (dadgummed expensive too)!!!

Here's a crazy idea for your cutter. I have 16 inch clear tack tape. maybe you have some 6". Try removing the vynil from the slick backing paper and then put the tack tape on that then cut it. With that adhesive designed to "let go" you might have better luck.

Cristian2fast4you

Brake in of my EVO 7-77 continues. Hope to finish in next weekend.
http://youtu.be/FXNfKSA--lI

Maxam

My Feedback: (62)

Hi all, It is just about 70 degrees here in Indianapolis. Thought I would go over a short check list to begin the flying season.
1. Is your engine clean? Brake cleaner is effective but if used it will remove ALL oil!!
2. lube the followers, pushrod ends, rocker pivots, between the rocker and valve stem and the stem itself within the spring. I like those model train oilers.
3. Drain the lower cylinders of oil! There will be a lot of oil!
4. Valves adjusted???
5. Cycle the glow igniter batteries.
6. Mounting bolts tight?
7. Prop nut tight?
8. Correct oil content in the fuel?
Wishing all a great flying season! -Tom

Maxam

My Feedback: (62)

Oops duplicate.

blw

My Feedback: (3)

Very, very old school. The job was called commercial art back then too. An old timer once told me that if you knew two words, frisket and font, you were hired on the spot by almost any company looking for a commercial artist.

slskn

My Feedback: (4)

Ok, here are some pics of my Stearman, and thanks to Rick, "Pull up now" on the exhaust ring "aka" Lowes sprinker ring, as this was made as per the pics done by Rick, on thread #527 page 22, finally got the engine mounted and now need to hook every thing up and should be able to maiden the first flight in a week or so.