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[Baldrick]

I would just like to thank everyone for their input on this thread. I have at last after speaking to many people placed an order with Nigel at Pendle steam. He is making me the boiler, seperator and gas tank. He was extremely helpful even to the point where he asked me how I was mounting the boiler. I said that I was mounting it on a plate so he's putting some small feet on it with a BA thread tapped in to make the job easier for me. I'm really looking forward to receiving my order in a few weeks. I'll get some photos up when it does.

Glad you got good service. I have to say that with all my dealings with suppliers none get near the personal service I received from Nigel TJ . I wanted a bespoke burner for my old Cheddar restoration and although not part of their range Nigel designed one and sent me drgs so I could check it was OK , then made it in double quick time and sent me a U-Tube video of the burner on test . All for a very reasonable price , I rate him highly.

[xrad]

I am partial to the extremely easy to build and operate V twin #8 PM research (1/2 x 3/4 b+s). It puts out a good amount of power,  subjectively more than the TVR, and in a compact size. This in conjunction with Pendle 3.5 or 4" boiler would make a great match.


Additionally the PMResearch engine is super easy to run with only single RC control arm. No hackworth issues...

[Baldrick]

I am partial to the extremely easy to build and operate V twin #8 PM research (1/2 x 3/4 b+s). It puts out a good amount of power,  subjectively more than the TVR, and in a compact size. This in conjunction with Pendle 3.5 or 4" boiler would make a great match.


Additionally the PMResearch engine is super easy to run with only single RC control arm. No hackworth issues...

  Additionally it comes as a kit so you can have the fun of building it.

[rhavrane]

Bonjour,
The PM Research is a 9,65 cm3, so it needs a lot of steam and, to my opinion, needs an additional coupled water pump to be installed in a 90 cm boat if a reasonable autonomy is expected.
Here is one exemple of a Graham installed on a removable platform : https://www.youtube.com/watch?v=qrtFh6a15qU

[RWH]

Here is one exemple of a Graham installed on a removable platform : https://www.youtube.com/watch?v=qrtFh6a15qU



Hello Raphaël,


That looks more like a PM Research #8 engine to me?


Kind regards,


Bob

[rhavrane]

Bonjour Bob,
Yo are absolutely right, I wanted to illustrate the PMR discussion and confused with the Graha one also evoked, good observation, thank you for your appropriate remark 

[RWH]

Hello again Raphaël,


I have been thinking about buying the PM Research #8 engine. I have reviewed quite a few of you videos and enjoy them very much. Do you have one of these engines? I imagine that with such a large bore and stroke, it must be quite steam thirsty and do you know what the maximum steam pressure one can run with this engine? I am thinking it must be quite low because of the type of seals used around the piston.


Kind regards,
Bob

Bonjour Bob,
Yo are absolutely right, I wanted to illustrate the PMR discussion and confused with the Graha one also evoked, good observation, thank you for your appropriate remark 

[xrad]

https://www.youtube.com/watch?v=diwGIN3AWtc&index=33&list=UUYQskpmHyALB5hsentYB_6g


no problem running at 5-20 psi, although gauge shows 60 psi, main valve to engine only cracked open a bit...

[rhavrane]

Bonjour Bob,

I have not had any opportunity to have one PMR but my friend Eric has two of them. This one runs perfectly well at about 35 psi (2,5 bars) https://www.youtube.com/watch?v=qsRs65FekEM  the second one does not run... and we do not know why 

And you are right again, 8 cm3 need steam... Useful if power is really needed, but, often, we put too much power in our hulls and have a speed not realistic at all.  My largest ratio cm3 weight is 4 with my gunboat Fulgerul ( 2 x 2 cm3, 16 kilos) : https://www.youtube.com/watch?v=qsRs65FekEM and https://www.youtube.com/watch?v=ckakDalgPfY

[RWH]

Hi Raphaël,


Thanks for the videos. It was nice to see the #8 in live action as well as you twin screw model. I imagine the PM #8 could easily turn a 90mm prop. I am undecided if I should go with a 3" or 3 1/2" prop for my Lady Margaret. The larger prop would turn a little below the keel whereas the 3" would be more to scale. I can get a 3" high pitch prop which should work well from the Prop Shop but I am still undecided. I will not be using the PM #8 for my Lady Margaret but for some other project.


Regards,


Bob

Bonjour Bob,

I have not had any opportunity to have one PMR but my friend Eric has two of them. This one runs perfectly well at about 35 psi (2,5 bars) https://www.youtube.com/watch?v=qsRs65FekEM  the second one does not run... and we do not know why 

And you are right again, 8 cm3 need steam... Useful if power is really needed, but, often, we put too much power in our hulls and have a speed not realistic at all.  My largest ratio cm3 weight is 4 with my gunboat Fulgerul ( 2 x 2 cm3, 16 kilos) : https://www.youtube.com/watch?v=qsRs65FekEM and https://www.youtube.com/watch?v=ckakDalgPfY

[rhavrane]

Bonjour Bob,
I always use as large as possible propellers to slow down my machines, 4 blades and Proopshop generally:
2" or 2,5" for my 2 cm3, 2,75" for my 3 cm3, and 3,5" for my 7,5 cm3.
Examples : https://www.youtube.com/watch?v=TVl2NCWmyXA
And how do you find thess ones    ?
3,5"                                    https://www.youtube.com/watch?v=PZMHShJZBPU


4,5" (for my Stuart D10) :           https://www.youtube.com/watch?v=utYZJDJPBVg


An exception (90 mm) :              https://www.youtube.com/watch?v=QIbGjiD36xU

[RWH]

Hello Raphaël,


Thank you for those wonderful videos. They were most informant and educational. That 4.5" prop on your D10 is quite the "Big Boy". I see that the 90mm prop on your version of the "Lady Margaret" does turn below the keel. I think the larger propellers look better than the smaller ones plus give better performance particularly is savings of using less steam by running lower rpms.


Regards,


Bob

Bonjour Bob,
I always use as large as possible propellers to slow down my machines, 4 blades and Proopshop generally:
2" or 2,5" for my 2 cm3, 2,75" for my 3 cm3, and 3,5" for my 7,5 cm3.
Examples : https://www.youtube.com/watch?v=TVl2NCWmyXA
And how do you find thess ones    ?
3,5"                                    https://www.youtube.com/watch?v=PZMHShJZBPU


4,5" (for my Stuart D10) :           https://www.youtube.com/watch?v=utYZJDJPBVg


An exception (90 mm) :              https://www.youtube.com/watch?v=QIbGjiD36xU

[rhavrane]

bonjour Bob,


I confirm, on several of my boats, associated to a reasonable pressure of 2 bars, in adddition to the look, I have measured a gain of  about 30 % on the initial autonomy by installing larger propellers