Home
Rules
Latest images
Search
Register
Log in
Log in
Search
Latest topics
» My N-1R build logby roddie Yesterday at 9:29 pm
» Funny what you find when you go looking
by rsv1cox Yesterday at 3:21 pm
» Landing-gear tips
by 1975 control line guy Yesterday at 8:17 am
» Purchased the last of any bult engines from Ken Enya
by sosam117 Yesterday at 7:45 am
» Cox NaBOO - Just in time for Halloween
by rsv1cox Tue Nov 19, 2024 6:35 pm
» Canada Post strike - We are still shipping :)
by Cox International Tue Nov 19, 2024 12:01 pm
» Duende V model from RC Model magazine 1983.
by getback Tue Nov 19, 2024 6:08 am
» My current avatar photo
by roddie Mon Nov 18, 2024 9:05 pm
» My latest doodle...
by TD ABUSER Mon Nov 18, 2024 11:30 am
» Brushless motors?
by rsv1cox Sun Nov 17, 2024 6:40 pm
» Free Flight Radio Assist
by rdw777 Sun Nov 17, 2024 6:03 pm
» Tribute Shoestring build
by amurphy6812 Sun Nov 17, 2024 5:43 pm
Cox Engine of The Month
CEF Traveling Engine
Win This Engine!
Live on Patrol
My entry in this years Tach Race
Page 1 of 1
cryo-one- Moderate Poster
- Posts : 27
Join date : 2013-01-13
Age : 81
Location : New Westminster, B. C. CANADA
Re: My entry in this years Tach Race
pkrankow Sun Jan 27, 2013 8:47 am
Do you know the providence of that motor?
Phil
Phil
pkrankow- Top Poster
- Posts : 3025
Join date : 2012-10-02
Location : Ohio
Re: My entry in this years Tach Race
cryo-one Sun Jan 27, 2013 2:15 pm
I know everything about it as I built it.
Please list your questions and I will answer them.
Wayne
Please list your questions and I will answer them.
Wayne
cryo-one- Moderate Poster
- Posts : 27
Join date : 2013-01-13
Age : 81
Location : New Westminster, B. C. CANADA
Re: My entry in this years Tach Race
pkrankow Sun Jan 27, 2013 2:54 pm
Well then!
What did you do to build it?
How did you form the intake assembly?
How did you seal the back plate from the reed?
How did you decide on the hole location and size for the intake timing? Or did you just make a hole in a location you thought suitable?
Can you post photos of it disassembled?
Does it run better than as a reedy?
Phil
What did you do to build it?
How did you form the intake assembly?
How did you seal the back plate from the reed?
How did you decide on the hole location and size for the intake timing? Or did you just make a hole in a location you thought suitable?
Can you post photos of it disassembled?
Does it run better than as a reedy?
Phil
pkrankow- Top Poster
- Posts : 3025
Join date : 2012-10-02
Location : Ohio
Re: My entry in this years Tach Race
cryo-one Sun Jan 27, 2013 3:30 pm
How did you form the intake assembly?
- Chose a cylinder that was good but not valuable.
- Milled a 1/4 " dia. flat on the side below the ex. port.
- Machined a steel tube 1/4" dia. X 5/16" long with 1/8" dia hole through center & threaded OD 1/4 - 32.
- Silver Soldered tube to flat on the cylinder and then drilled 1/8 hole through cylinder wall.
- Cleaned all burrs and lapped cylinder bore.
How did you seal the back plate from the reed?
- The reed is still there but passage behind it is plugged.
- The reed assembly just 'stuffs' the crankcase.
The location of the intake port is determined by available physical space on the side of the cylinder.
The diameter of the port was chosen to match the ID of a Tee Dee crankshaft.
Intake timing appears to be about 95 deg BTDC to 95 deg ABDC.
Pictures will have to wait until it returns from the TACH RACE.
Tach Race will provide performance numbers.
Regards, Wayne
- Chose a cylinder that was good but not valuable.
- Milled a 1/4 " dia. flat on the side below the ex. port.
- Machined a steel tube 1/4" dia. X 5/16" long with 1/8" dia hole through center & threaded OD 1/4 - 32.
- Silver Soldered tube to flat on the cylinder and then drilled 1/8 hole through cylinder wall.
- Cleaned all burrs and lapped cylinder bore.
How did you seal the back plate from the reed?
- The reed is still there but passage behind it is plugged.
- The reed assembly just 'stuffs' the crankcase.
The location of the intake port is determined by available physical space on the side of the cylinder.
The diameter of the port was chosen to match the ID of a Tee Dee crankshaft.
Intake timing appears to be about 95 deg BTDC to 95 deg ABDC.
Pictures will have to wait until it returns from the TACH RACE.
Tach Race will provide performance numbers.
Regards, Wayne
cryo-one- Moderate Poster
- Posts : 27
Join date : 2013-01-13
Age : 81
Location : New Westminster, B. C. CANADA
My entry in this years Tach Race
pkrankow Sun Jan 27, 2013 6:05 pm
I look forward to performance numbers!
Phil
Phil
pkrankow- Top Poster
- Posts : 3025
Join date : 2012-10-02
Location : Ohio
Re: My entry in this years Tach Race
Motra Sun Jan 27, 2013 10:13 pm
Do you feel that the piston port design offers some advantages or is this more experimental?
Motra- Gold Member
- Posts : 111
Join date : 2010-08-20
Location : SLC, UT
Similar topics» Tach Race 2015 Final Wrap-Up
» TACH RACE!
» The South East England Monsoon of 2012 continues.......
» Tach Race 2013 Class Photo, All Individual Entries, and Final Race Recap
» 2018 to 2019 CEF Run What YA Brung UNLIMITED speed contes (CLOSED)
» TACH RACE!
» The South East England Monsoon of 2012 continues.......
» Tach Race 2013 Class Photo, All Individual Entries, and Final Race Recap
» 2018 to 2019 CEF Run What YA Brung UNLIMITED speed contes (CLOSED)
Page 1 of 1
Permissions in this forum:
You cannot reply to topics in this forum