RCU Forums - Search Results
RCU Forums

Go Back  RCU Forums > Search Forums
Reload this Page >

Search Results

Register
FAQ
Community
Calendar
Today's Posts
Search
Vendor Directory
Notices
 
Page 1 of 20
1
2
3
11
Last »
Search: Posts Made By: Jazzy
Showing results 1 to 25 of 500
Search took 2.08 seconds.
Forum: Questions and Answers
09-07-2023, 07:32 AM
Replies: 1
Views: 600
Posted By Jazzy

Can This Glow Trainer be Converted to Electric?

Hey all,
The last time I flew a glow powered aircraft was 2008. Job changes, residence changes, relationship changes, and other things got in the way of my favorite hobby - flying RC planes! Now...
Forum: Engine Conversions
04-30-2012, 07:30 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Sweet!! The thrill never goes away...

Whatever info you can share would be great.

Thanks,
Jeff
Forum: Engine Conversions
04-28-2012, 06:54 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Yeah, that's what I was figuring on using.

I considered modifying the piston crown but that would affect CR. It seems to be the one thing that is just about perfect so I don't want to mess with...
Forum: Engine Conversions
04-28-2012, 07:33 AM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

AV8TOR,

Thanks for the tips. I haven't figured out yet how I intend to get a tool to the top of the transfer ports.
Forum: Engine Conversions
04-26-2012, 08:26 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

The porting for this engine is as follows:

Exhaust Port:
-open @ 114 deg
-close @ 254 deg
-duration = 140 deg
-ideal range: 140 - 150 deg

Transfer Ports:
- open @ 132 deg
Forum: Engine Conversions
04-24-2012, 04:54 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Ran it without the muffler today after work.

IT IS IMPERATIVE THAT HEARING PROTECTION IS WORN!!!

I actually had foam plugs in as well as my shooting muffs. It was bearable.

Well, I...
Forum: Engine Conversions
04-23-2012, 07:37 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

I took the spark plug out and the muffler off.

The top of the piston, after about a tank and a half of 40:1 mix, is already caking with crud.

The exhaust port and side of the piston are...
Forum: Engine Conversions
04-22-2012, 06:25 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Ah, yes. Finally had some time to tinker more.
Unfortunately, the remote primer bulb bought the farm while trying to start the engine yesterday... Or was it the day before?
Anyway, I ended up...
Forum: Engine Conversions
04-15-2012, 09:02 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Spaceworm,
I tried just slipping the catch off the throttle lever but it was not conducive to what I deemed acceptable "spring" behavior. There IS some lateral play in the throttle arm so I may...
Forum: Engine Conversions
04-15-2012, 05:28 AM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Okay. Time for another installment.
The resistor spark plug, prop hub, velocity stack, and mounting plate came in from Carr Precision. Very nice!

Cleaning up the flywheel was a time...
Forum: Engine Conversions
03-20-2012, 04:03 AM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Got around to doing some more measuring.

I put the piston at TDC and slowly filled the combustion chamber through the spark plug hole with 2-stroke oil.
I used a syringe-type dispenser that...
Forum: Engine Conversions
03-18-2012, 05:27 AM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

tkg,

I haven't yet done the measuring to see how much room I have to play with as far as exposing the piston skirt in either opening. Those will come soon.

The direction I go in with the...
Forum: Engine Conversions
03-16-2012, 01:52 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

av8tor1977,

I just got a good look at the image you posted! Very nice!

Had I seen it sooner I wouldn't have had to make one at work. I used A-cad so it turned out nicely.
I sized it so...
Forum: Engine Conversions
03-15-2012, 03:09 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

w8ye,

you know, I've been tossing that idea around for a few weeks now. Any pointers for such an undertaking?
I'll consider this in more depth when I see what the actual timing and exhaust...
Forum: Engine Conversions
03-13-2012, 08:53 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Thanks for the tips!
I kinda figured the restriction in the intake port was there to keep the ring concentric. I'll leave that nub alone.

The exhaust port has a similar center "column" in...
Forum: Engine Conversions
03-12-2012, 08:45 PM
Replies: 9
Views: 1,345
Posted By Jazzy

RE: Walbro experts needed

Are you using a velocity stack? Without one it is not uncommon to get erratic operation.

I wouldn't mess with the pump/metering needle fork but someone with more knowledge may say otherwise. ...
Forum: Engine Conversions
03-12-2012, 08:37 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Another mod is the back plate and possibly the back surface of the crack case. The back place WILL need to be trimmed. See silver outline on the back plate. A common mod to the case is to take...
Forum: Engine Conversions
03-12-2012, 07:07 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Using Outers Crud Cutter, Mass Air Flow Cleaner, and Scotchbrite the crank case cleaned up nicely. The piston took well to the scotchbrite. I got a little over zealous on the piston crown but I'm...
Forum: Engine Conversions
03-12-2012, 06:57 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Finally had time for more tinkering. Sorry for the long pause but 'work' does pay the bills! LOL

I ordered a prop hub, velocity stack, and resistor spark plug from Carr.
In the meantime I...
Forum: Engine Conversions
02-28-2012, 08:53 AM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Gents,

I thought I had a link to find a prop hub adapter but now I can't find it. I tried searching but didn't have much luck.

Can someone post or send me some links please?

Thanks,
...
Forum: Engine Conversions
02-11-2012, 01:19 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Ranger,

Interestingly enough, the crank threads are 5/16-24 on this engine.

The rolling-thread screws used to hold pretty much everything else together are 10-32. This will make for an...
Forum: Engine Conversions
02-11-2012, 12:49 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

More tinkering:

The first thing I need to do was remove the drive shaft adapter. As it is a CCWSE rotating crankshaft, the threads are standard: "Lefty-Loosy."
A screwdriver and curve-jawed...
Forum: Engine Conversions
02-04-2012, 06:29 AM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

Thanks w8ye!

I wonder if changing the head and piston could make this one a 32cc engine...
I don't know if the cranks or connecting rods are the same for the two different displacements...
Forum: Engine Conversions
02-03-2012, 09:01 PM
Replies: 47
Views: 4,805
Posted By Jazzy

RE: Mac 2815 Weedie Conversion

I finally had some time to tinker a little more.

I wanted to get an all-up weight of the engine-muffler-carb-magneto combination before I started cutting metal and plastic.
To do this I had to...
Forum: Engine Conversions
01-17-2012, 08:09 PM
Replies: 47
Views: 4,805
Posted By Jazzy

Mac 2815 Weedie Conversion

I am going to be converting a Mac 2815, gas, 2 stroke weedie into an aircraft engine.
The plan is to do a step by step walk through to show those that my be daunted by such an endeavor that it...
Showing results 1 to 25 of 500
 
Page 1 of 20
1
2
3
11
Last »


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.