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        Discussion home made twin

#1 speedygonzales Oct 02, 2012 09:20 PM

home made twin
 
thought I would share.

Nitro Inline Twin Model Engine (0 min 41 sec)


and the beginnings prior to it running

RC Nitro Motor Build (5 min 18 sec)


going to be making more. hopefully a radial 9 cylinder or a v4 next with cox cylinders. subscribe to my youtube to get all the updates. so many forums hard to keep track or posts!

#2 cbarnes0061 Oct 08, 2012 12:40 AM

Thats pretty sweet looking.

#3 rchopper56 Oct 08, 2012 10:12 AM

Speedy,
Would love to see more especially on a crankshaft for a twin. Thanks
Gene

#4 speedygonzales Oct 08, 2012 10:53 AM

yes, here are some additional pictures.

soon to be crank pin
http://i584.photobucket.com/albums/s...s/DSC00387.jpg

5/8 TGP machined and piston clearances
http://i584.photobucket.com/albums/s...s/DSC00388.jpg

crank pin located and drilled, this makes the crank a two piece
http://i584.photobucket.com/albums/s...s/DSC00389.jpg

crank finished, transfer ports drilled and timing set 18deg cc
http://i584.photobucket.com/albums/s...s/DSC00390.jpg

#5 Bare Oct 08, 2012 11:01 AM

Interesting... Looking like a Model Tugboat intended motor design though.

#6 rchopper56 Oct 08, 2012 05:15 PM

Is that last photo of the finished crank?
Gene

#7 Gooroo Oct 08, 2012 06:29 PM

Quote:

Originally Posted by rchopper56 (Post 22947849)
Is that last photo of the finished crank?
Gene

With that crank the motor will probably top out at around 5K and idle at under 1K. Might make a good diesel!:D

#8 speedygonzales Oct 08, 2012 07:22 PM

yes finished crank Gene, I could take another picture of the transfer ports, you dont see those on the pictures. thats what feeds the cylinders their fuel.

Gooroo, I have thought of putting diesel heads on it.

#9 rchopper56 Oct 09, 2012 03:11 AM

Quote:

Originally Posted by speedygonzales (Post 22948911)
yes finished crank Gene, I could take another picture of the transfer ports, you dont see those on the pictures. thats what feeds the cylinders their fuel.

Gooroo, I have thought of putting diesel heads on it.

The transfer ports would be very interesting and thank you for the photos of the crank. I have never made an engine myself mainly do to crank complexity.
Gene

#10 ARUP Oct 09, 2012 07:05 PM

Very cool! I would love to have a 4 or 6 cylinder version to mimic a Menasco for Golden Age racer!

#11 speedygonzales Oct 09, 2012 10:33 PM

thank you ARUP. yes 4 is doable!

#12 Reginald Oct 10, 2012 07:09 AM

2 Attachment(s)
Quote:

Originally Posted by ARUP (Post 22957797)
Very cool! I would love to have a 4 or 6 cylinder version to mimic a Menasco for Golden Age racer!

Here are some pictures of the 4-cylinder version. I do have pics of the "near" completed engine somewhere. Bought from someone with intention to finish but with many other engine things to do ... Seems like a wobbly affair to me I do not remember bearings or bushes used. I'll have another look at the engine tomorrow and make pictures. Think the engine is pictured on my site for those un-familiar with www.reginaldluycx.be

#13 speedygonzales Oct 10, 2012 11:19 AM

yep, its minorly wobbly. no bearings BUT if you do proceed its not to difficult to install some. I am currently installing bearings on mine and it should make a difference.

the other thing I would suggest is installing locating pins on the covers (front plate, back plate) because they tend to want to not stay true when fastening them down. I regret not thinking of that sooner, will be more challenging to do it now.

Quote:

Originally Posted by Reginald (Post 22961300)
Here are some pictures of the 4-cylinder version. I do have pics of the "near" completed engine somewhere. Bought from someone with intention to finish but with many other engine things to do ... Seems like a wobbly affair to me I do not remember bearings or bushes used. I'll have another look at the engine tomorrow and make pictures. Think the engine is pictured on my site for those un-familiar with www.reginaldluycx.be



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