The Unofficial Mamod and Other Steam Forum The Unofficial Mamod and Other Steam Forum
The Original Toy Steam Forum
Established 2006
The biggest, most popular global steam forum around! Accept NO imitations!
We have a growing community of regular posting members who chat about all aspects of toy and model steam.
 
FAQ :: Search :: Memberlist :: Usergroups :: Join! (free)
Profile :: Log in to check your private messages :: Log in



Chat Safe Rules

Advice on SE2 engine block constr.

 
Post new topic   Reply to topic    The Unofficial Mamod and Other Steam Forum Forum Index -> Technical tips, Details, Home Builds and Help Me!!
View previous topic :: View next topic  
Author Message
Spot99


Junior Member


Joined: 29 Mar 2017
Posts: 151

FLAGS
Location: Essex

PostPosted: Fri Jul 14, 2017 9:28 pm    Post subject: Advice on SE2 engine block constr. Reply with quote

Hi. Opinions needed please. Im renovating an old (1950 transition era) Mammod SE2.
Im familiar with the usual engine block construction that incorporates a felt washer in the engine block 'oil reservoir' around the trunnion -facing towards the piston block, and a lube hole in the top of the block to oil it.
The model that im renovating today has an additional cut out - presumably for another felt 'oil washer' - on the OTHER side of the engine block i.e. where it is attached to the engine frame, so guess two felt washers needed around the trunnion, one on either side? Not encountered this before. BUT on this cylinder block there is no lube hole in the top of the cylinder block to lube the washer hole, anyway!
So ..Question - is this a quirky Mamod 1950's transition feature, or have I purchased a retro fit cylinder block that is a bit wrong? Its not a big deal, engine will doubtless work fine with usual steam oil application as ever, but I am trying to learn about the differences in construction as the SE range evolved, anyone else got one like this????
I will make up some liitle felt washers for the recesses, should be simple enough, got some felt pads here (somewhere!) regardless of they are needed, or not!
Cheers
Spot
Back to top
View user's profile Send private message
Wallace


Honorary Life Member


Joined: 19 Jul 2006
Posts: 24309

FLAGS
Location: New South Wales, Australia

PostPosted: Fri Jul 14, 2017 11:49 pm    Post subject: Reply with quote

Hi Spot.

Could you post some pics?

I have never heard of a recess being on both sides. The abnormal recess you mention would have no benefit at all.
However there were 2 types of recesses.
1 was for the oiler pad. This recess is about 2/3 - 3/4 the depth of the brass. So with the oiler hole in the top, centred in terms of width, the recess is deep enough to incorporate the oiler hole.

The other recess is much shallower and not designed to take a felt pad, nor does the engine block have an oiler hole in the top.

Is the recessed hole on the cylinder side very deep, or shallow?

If shallow it could be as you suggest, a transition period. I could picture the engine block having the deep recess drilled for an oiler pad but no other holes/ports drilled. But later, or during the transition, this "left over" block was flipped over and had a shallower recess drilled and setup for what would be the later models without the oiler pad.

It probably wouldn't be a retro fit. Just off the top of my head if a engine block was flipped over, the screw holes to hold it to the engine frame would be opposite and not line up. The exhaust would port would be at the top instead of the bottom... probably other things too. Unless you have an engine block that had a lot of solder filling.
_________________
Andrew
Back to top
View user's profile Send private message Visit poster's website
Spot99


Junior Member


Joined: 29 Mar 2017
Posts: 151

FLAGS
Location: Essex

PostPosted: Sat Jul 15, 2017 12:00 am    Post subject: Reply with quote

G'day and thanks!
Ok, I thought it was a dimwit question, but maybe not? Ok, I will try and take some pics. I agree, no point in two useles oiling points, strange isnt it. If I had more knowledge maybe an alien fitting? And as you say, if a flipped over fitting - then it wouldnt have "fitted"?! Totally weird. Will post some pics next if I can get it to work -but as I said, not a big deal, but I am simply intrigued as to why?'
Back to top
View user's profile Send private message
Wallace


Honorary Life Member


Joined: 19 Jul 2006
Posts: 24309

FLAGS
Location: New South Wales, Australia

PostPosted: Sat Jul 15, 2017 12:17 am    Post subject: Reply with quote

Yeah far from a dimwit question. Possibly it is an interesting piece.
It could be a prior owner decided to drill a recess on the other side for a reason only known to them.

I cannot recall what era Mamod did away with the oiler pads and oiler hole.

Over the years there as been plenty of oddities. Some clearly done by mamod, others probably by owners, and others "we'll never know"

Just the other day I realised I had missed an email from months ago from a person who contacted me through my website. The offered for sale a Mamod with a hot stamped mazak flywheel. I have only ever seen 1, maybe 2 others like this. It was put down to a test flywheel by mamod.
I was too late, they had sold it  
_________________
Andrew
Back to top
View user's profile Send private message Visit poster's website
Spot99


Junior Member


Joined: 29 Mar 2017
Posts: 151

FLAGS
Location: Essex

PostPosted: Sat Jul 15, 2017 12:19 am    Post subject: Reply with quote



Can you see it ? Both sides, totally useless oiling point, and no oiling point at the top of the engine block anyway? Absolutely strange! Maybe Mr Malins was having a bad hair day?!! I certainly do !!
Back to top
View user's profile Send private message
Wallace


Honorary Life Member


Joined: 19 Jul 2006
Posts: 24309

FLAGS
Location: New South Wales, Australia

PostPosted: Sat Jul 15, 2017 3:29 am    Post subject: Reply with quote

That is so odd.

I have never seen that ever. I think as you say it was a bad hair day. The recesses without oiler pads aren't totally useless. They will hold a little oil. But the extra one is useless

I have no idea of the drilling order for the blocks but would think with a transition they'd keep the recess deep but drop the oiler hole. Eventually coming to the design of a shallower recess.

Actually it might be related to this sign which I had never heard of until the other day, but it must be well known as it was easy to find on the internet.



I was getting a rego check for my car and saw this hanging up. My car passed and it was a Thursday. Next time I will remember to get such a check on a Friday, and any mechanical work on a Thursday.
_________________
Andrew
Back to top
View user's profile Send private message Visit poster's website
Spot99


Junior Member


Joined: 29 Mar 2017
Posts: 151

FLAGS
Location: Essex

PostPosted: Sat Jul 15, 2017 7:41 am    Post subject: Reply with quote

Haha! Excellent! Well done Andrew, I like that  
Yes, I reckon it was a definite Friday afternoon job, the infamous P.O.E.T.S day strikes again ('push' off early, tomorrow's Saturday), reassuring to know that some things in life never change
Cheers
Spot
Back to top
View user's profile Send private message
Dr. Rog


Steam Supreme Being


Joined: 30 Dec 2008
Posts: 9572

FLAGS
Location: Kingsclere UK

PostPosted: Sat Jul 15, 2017 11:46 am    Post subject: Reply with quote



A rare goof, I am sure.

As it will still work its not scrap so got used.

This is like that rare stamp with a defect on - possibly more valuable as a result.  
_________________
Cheers
Rog.

https://www.youtube.com/user/DrRogB/videos

New positive motto for 2017: carpe diem
Back to top
View user's profile Send private message
Spot99


Junior Member


Joined: 29 Mar 2017
Posts: 151

FLAGS
Location: Essex

PostPosted: Sat Jul 15, 2017 12:27 pm    Post subject: Reply with quote

Haha    Yes Rog, but I dont think I'll book my world cruise on the strength of it, no doubled its value from 1 to 2 !  The solid piston block and piston are also quite badly made on this one, to the point of not working nicely, so Im rapidly coming to the conclusion that it might have been a first attempt at machining by someone new working for Mr Malins ? Anyway, its all in bits at the moment awaiting a clean, the only redeeming factors are the brass flywheel and and the domed steam pipe union nut that he used briefly on some 1950s models. Will see if I can get it running again in due course and post a pic.
Cheers
Spot
Back to top
View user's profile Send private message
MrDuck


Steam God!


Joined: 05 Mar 2010
Posts: 40349

FLAGS
Location: Sweden, Uppsala

PostPosted: Sun Jul 16, 2017 7:50 am    Post subject: Reply with quote

I suspect it was made to alleviate friction.

I have seen the construction on other older oscillators and it seems to be the purpose as the recess isn't utilised in any way and against a surface.
_________________
Et in Arcadia Ego
Back to top
View user's profile Send private message Send e-mail MSN Messenger
Display posts from previous:   
Post new topic   Reply to topic    The Unofficial Mamod and Other Steam Forum Forum Index -> Technical tips, Details, Home Builds and Help Me!! All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Card File  Gallery  Forum Archive
smartBlue Style © 2002 Smartor
Powered by phpBB © 2001, 2002 phpBB Group
 

Welcome to The Unofficial Mamod & Other Steam Forum!
Welcome. We're a friendly place to share knowledge & chat about this great hobby. Since our July 06 startup, we have grown to over 2500 members, who have posted over 1 1/4 million posts. We can answer most toy steam questions, basic or complex. Our multi-national members enjoy sharing photos & videos of engines by Mamod, Wilesco, Jensen, Bowman, SEL, Doll, Bing, Scorpion, Renown & more. All collectors are welcome & if you are just starting out in the hobby, we can suggest some ideal engines. Our forum is ad free & costs nothing to be a member.
Press the 'Join' button at the top of the page, to be part of the largest toy steam forum on the internet.
For membership or joining issues email Sandman: sandmansmail665@gmail.com
Engine of the Month July
EOTM
JKBixby's
2015 Krick Borkum w/Cheddar Pintail
Click picture to enlarge