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-   -   mintor engines (https://www.rcuniverse.com/forum/gas-engines-142/11069837-mintor-engines.html)

Ernie Misner 09-20-2012 08:27 PM

RE: mintor engines
 
Thanks Karol. Do you have great flying weather all year around in Jamaica?

TimBle 09-21-2012 12:50 AM

RE: mintor engines
 


ORIGINAL: karolh

I am wondering just how accurate is the RC exl tach, as when bench running my Mintor 22cc it is registering 8,100 rpm spinning a Falcon 17x6 wood prop. How does this figure compare to what you guys are getting.

Karol

i'm getting similar results

karolh 09-21-2012 07:27 AM

RE: mintor engines
 
Ernie,

Yes, we do have year round flying weather here except for when a tropical storm or hurricane comes a calling and sometimes during the month of March when it can get extremely windy.;)


TimBle,

The M22 is proving to be a real sweetheart of an engine with it's ease of starting, great transition and it runs ever so smoothly.

Karol

TimBle 09-21-2012 10:08 AM

RE: mintor engines
 
good to hear that. It's a real gem in this size class.

Ernie Misner 09-21-2012 10:27 AM

RE: mintor engines
 
Does anyone make a header pipe for the mintor yet? I might want to put a tuned pipe or canister on it.

Thanks,

Ernie

MTK 09-21-2012 12:26 PM

RE: mintor engines
 


ORIGINAL: Ernie Misner

Does anyone make a header pipe for the mintor yet? I might want to put a tuned pipe or canister on it.

Thanks,

Ernie
Mintor does for the 38cc. I have a Mintor header with the 4 bolts. Or you can make an adapter and use a more typical 2 bolt header. I did that too

Ernie Misner 09-21-2012 02:47 PM

RE: mintor engines
 
The adaptor sounds interesting. Perhaps someone will offer a header before too long for the 22cc. If I get this engine I know eventually I'll want to put that nice carbon fiber tuned and muffled pipe on it. It's expensive though but what can you do.....

Thanks,

Ernie Misner

captinjohn 09-21-2012 05:54 PM

RE: mintor engines
 


ORIGINAL: MTK



ORIGINAL: Ernie Misner

Does anyone make a header pipe for the mintor yet? I might want to put a tuned pipe or canister on it.

Thanks,

Ernie
Mintor does for the 38cc. I have a Mintor header with the 4 bolts. Or you can make an adapter and use a more typical 2 bolt header. I did that too
How about taking a few seconds and posting a few photos of the headers? Thanks... Capt,n

coralcape 09-22-2012 04:33 AM

RE: mintor engines
 
OK, a new problem. Buddy of mine has a 22cc mintor in a BUSA Eindeker, that crashed on second flight. (reason unknown) Crank was bent. I offered to try and straighten and when I opened it up, found the crankpin had a rear keeper, behind the rod. I am unable to remove it, to work on the crank. I did try a heatgun, no joy. Any ideas? red

karolh 09-22-2012 08:20 AM

RE: mintor engines
 
Check with Dennis at Top Dawg Aviation, he might be able to help you.

Karol

captinjohn 09-22-2012 10:34 AM

RE: mintor engines
 


ORIGINAL: coralcape

OK, a new problem. Buddy of mine has a 22cc mintor in a BUSA Eindeker, that crashed on second flight. (reason unknown) Crank was bent. I offered to try and straighten and when I opened it up, found the crankpin had a rear keeper, behind the rod. I am unable to remove it, to work on the crank. I did try a heatgun, no joy. Any ideas? red
Just a guess...it could be pressed on...if thats so...reverse press it off!

Ernie Misner 09-22-2012 11:07 PM

RE: mintor engines
 
Let us know how that keeper comes off, it must be a press fit. Nice that they have needle bearings on the rod. What about the wrist pin?

coralcape 09-23-2012 03:18 AM

RE: mintor engines
 
Contacted Top Dawg. Awaiting answer. red

TimBle 09-23-2012 07:30 AM

RE: mintor engines
 
it is SUnday......

coralcape 09-29-2012 03:50 AM

RE: mintor engines
 
It's been a week and no response from Topdawg. Will try to persuade the keeper to come off. For someone who asked, the engine does have pin bearings on both ends of rod. red

captinjohn 09-29-2012 05:07 AM

RE: mintor engines
 
1 Attachment(s)
Coralcape, This is a simular crank assembly. My guess is the rod and needle bearings are placed on the crahkpin...then the pin is pressed into the crank throw. It my be possible to press the pin out of the throw. Do some more research first. Best Regards Capt,n

captinjohn 09-29-2012 05:25 AM

RE: mintor engines
 
A way to straiten a crank is as follows. Drill a hole the size the shaft and ream it so the crank slips into it with a snug fit. This "hole" must be on a flat metal plate so you can use a dial indicater to see what way the crank is bent. The hole must be drilled exactly strait into the metal plate and cannot lean to one side. Tap the big end of crank in the direction to straiten it. Check all way around the shaft as you tap it with a heavy brass hammer until it reads as strait as possible. I would shoot for .001 - .003 that should be good I would think. Test this method on a crank out of a weed eater or what ever. Capt,n

Ernie Misner 09-29-2012 03:13 PM

RE: mintor engines
 
So what's the verdict on the Mintor rpms compared to the DLE with the same prop?

Thanks, Ernie

captinjohn 09-29-2012 04:41 PM

RE: mintor engines
 
I do nto know the RPM data...do not even own a tack. I did read the Mintor 22 had more power than the DLE. Capt,n

turbo.gst 09-29-2012 06:43 PM

RE: mintor engines
 
Header for 22, 33, 38 cc. Other types of headers are offered as well as cans type mufflers. Area 51 stuff.

http://www.vulcanhobbies.co.uk/minto...e-1-2095-p.asp

TimBle 09-30-2012 03:10 AM

RE: mintor engines
 


ORIGINAL: coralcape

It's been a week and no response from Topdawg. Will try to persuade the keeper to come off. For someone who asked, the engine does have pin bearings on both ends of rod. red
Thats because Dennis is on leave.
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TimBle 09-30-2012 03:12 AM

RE: mintor engines
 


ORIGINAL: turbo.gst

Header for 22, 33, 38 cc. Other types of headers are offered as well as cans type mufflers. Area 51 stuff.

http://www.vulcanhobbies.co.uk/minto...e-1-2095-p.asp
I would love to see how this header works. The three engines mentioned all have different jug diameters. This means that the header will need to be bent to meet the centre line of the engine its being used on....
A rather tricky prospect with aluminium
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coralcape 09-30-2012 03:23 AM

RE: mintor engines
 
Thanks Capt. That keeper looks exactly like it. When I get it off, I'll use my lathe as guide. Test, remove, tap and do it again 'til good. Good to hear explanation for no response. Thanks, red

captinjohn 09-30-2012 03:30 PM

RE: mintor engines
 
Antique (Ralph) is the person who told me how to straiten a crank. If my explanation was not right on I hope Antique would explain it...he is the master of this kind of stuff and machining also. He probably forgot more than most people know. He has explained about engines for many years, helping with engine problems. I like the way he does it too....short without writing a book!

Ernie Misner 09-30-2012 04:16 PM

RE: mintor engines
 
Perhaps that keeper is not meant to come off and the whole crank pin could be pressed out instead?


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