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Messages - Ernie Lazenby

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Items of Interest / Re: John Cobbs Crusader jet boat - 48 inch long
« on: April 22, 2019, 08:36:56 AM »
will do Eddy, good to have you with me on its first outing.

Power may be one of these or similar! The latest ones are full kero start. No gas.  I need to see how the hull develops. One consideration where do I run a gas turbine these days. Herrington is out. Our club is out. Brid may be an option but may be too small. Lake district probably when the parky is not about early morning.

Items of Interest / Re: John Cobbs Crusader jet boat - 48 inch long
« on: April 22, 2019, 08:26:48 AM »
The construction of the model is typical 'egg box'  stringers attached to frames then balsa wood planks to finish off. The base is one piece of lite plywood. Lite ply is basically a thin layer of balsa wood between two layers of thin plywood. Cuts well and keeps weight down. Egg box construction can result in a strong framework if done correctly. The original builder used balsa wood planks because its easily sanded to the correct shape. The downside is the more material that is sanded off to get the right shape the weaker the wood becomes and needs strengthening up with glass or carbon fibre cloth.

As with the full size boat, the area that take the pounding will need extra support; the front planning wedge in particular and where the sponsons join the sponson arms. In order to ensure the sponsons fit correctly and securely I have needed to remove wood from the bottom of each to expose the inside. After the sponsons have been glued in place and supported with carbon fibre cloth each structure will be glass clothed. Expanding foam will be put into to fill all the spaces/nooks and crannies and will provide flotation.

Items of Interest / John Cobbs Crusader jet boat - 48 inch long
« on: April 21, 2019, 05:14:42 PM »
I have started this thread for the information of those who would like to get into scratch building a model boat and maybe are too embarrassed to ask.
I will post regular updates explaining what's being done and how.
I will add a picture later today.
I acquired the part started boat via a friend. It was made many years ago and I got it pretty much as you see it.
First problem- Its far too light for the size and quite femur. Using Z poxy finishing epoxy thinned out with meths I have sealed the outer hull basically to hold it together while work is done on all the faults particularly around the air intakes. To fill holes and create the right form I used P38 filler from Halfords (Upol light is another good filler) It sand easily and can be added too until the right shape is formed. Z poxy also sands easily and can be used with glass cloth or carbon fibre cloth to skin the outer shell..

At this stage the method of powering the model must be considered. Quite easy using a brushless motor set up however I have been looking at powering with a miniature gas turbine engine of the type used in model aeroplanes. Model aeroplanes are quite light weight however the effort to get them up and away is considerably less than that that needed to get a planning craft out of the water and onto the plane.

20 lbs of thrust needs to be well secured in the hull and I reservations as to the suitability of this hull to handle the forces involved trying to get the mass moving. One does not want to see the jet engine shooting through the front of the boat. I have obtained a lot of Carbon fibre cloth and carbon fibre tape to strengthen up the hull and it may be okay we shall see.  The sponsons have been made very light weight and are weak. Much work is needed to make them suitable for high speed runs and the pounding they can take.
The picture with the little booklet shows the model as I got it.

Club News and Events / Club boat 'Kitty'
« on: April 20, 2019, 07:14:20 PM »
The club boat for use by members/prospective members is currently with me getting sorted. The radio gear we had with it was defective. The club has purchased a new 2.4 set  (38) and I am installing that. The boat will be back on its shelf on Wednesday.

Club News and Events / Some very good news
« on: April 15, 2019, 09:45:16 PM »
This evening I attended a council meeting and managed to secure a 7 year lease subject to the usual get out clauses for both parties. This secures our future. The fishing club have also got a 7 year lease for ponds 2 and 3. To dispel rumours let me make it very clear, the fishing club are not getting our water.

I will pass on further information at the club on Wednesday. I gave up an evening of playing chess for my team to ensure we secured our future I hope its appreciated.

Club News and Events / Re: Competition results 2019
« on: April 12, 2019, 04:08:20 PM »
well he was driving the boat I built, the one I sold last year to last years winner who sold it earlier this year to Doug. Its so much faster than any of the others he could drive it blindfolded because it knows its way around the course. Joking aside he drove it very well.

BTW Yacht racing results now included in original post.

Club News and Events / Competition results 2019
« on: April 11, 2019, 10:03:26 AM »
Week 1.

Scale racing.
  1st     Geoff Earl        10 pts
  2nd    Dave Moss        8  pts
  3rd    John Bailey       6  pts
  4th    Paul Furniss      4 pts
  5th    Doug White       2 Pts
  6th    Keith Woardby  1 pt

Air Boat Racing

  1st Doug White        10 pts
  2nd John Bailey        8 pts
  3rd  Les Ledger        6 pts
  4th Bruce Brennan   4 pts
  5th Paul Furniss       2 pts
  6th Geoff Earl          1 pts

 Steering Competition.  (first of 6)

  1st  Ernie Lazenby     10 pts
  2nd Dave Nell             8 pts
  3rd  Bob Golder          6 pts
  4th Steve Smith         4 pts
  5th Ken Smailes         2 pts
  6th Graham Tansley    1 pt
  7th Larry Gannon        1 pt
  8th Dave Moss            1 pt
  9th Doug White           1 pt
 10th George Hodgson   1 pt

  Restricted class yachts
1st  Alan Davies      14 pts
2nd Dave Moss        13 pts
3rd Geoff Sutcliffe    12 pts
4th John Bailey        11 pts
5th Paul Furniss       10 pts
6th Nat Earl             9 pts

Open Class yachts.
1st Geoff Sutcliffe     14 pts
2nd Dave Moss         13 pts
3rd Alan Davies        12 pts
4th Nat Earl             11 pts
5th Les Toulmin        10 pts
6th John Bailey         9 pts
7th Paul Furniss        8 pts.

Footy Racing
1st  John Bailey         14pts
2nd Geoff Sutcliffe     13 pts
3rd Alan Davies         12 pts.

« on: April 07, 2019, 10:28:15 PM »
 Big thank you to everyone who turned up today to help with the event. Makes life easy.
 Regretfully I have to report that your reporter won today :-[. Dave Nell second and Bob Golder third. Full results will be posted this week.

  One slightly annoying issue arose.  During these competitions (6 weeks out of 52!!!) no boats other than the one completing the course is allowed onto the water from the start of the event until the final competitor has finished. That's the club rule and it wont be altered*. Anyone who feels the need can bring it up at the next AGM in the meanwhile let it rest, its not good for harmony to have constant moaning. It will be discussed at the next committee meeting however no change will take place this year.

* confirmed by the committee members present today.

Club News and Events / Re: Recent donation
« on: April 06, 2019, 02:33:22 PM »
The engine is now on ebay and has attracted a first bid of 200.
The boat hull has been sold to a club member (Its not in a good condition and requires much work.
The boiler(very poor and not fit for purpose) and associated materials have been designated scrap.

We may get lucky and see more bids as the auction draws to a close.

Club News and Events / Race day is nearly upon us
« on: April 06, 2019, 02:14:07 PM »
Wednesday 10th April is our first race day of the season. Make sure you read the schedule which has been changed from last year.

 A warning- Regarding the scale racing and air boat racing the following procedure must be adhered to.

Upon finishing a race all competitors must produce the lipo battery to the assistant race controller (me) before leaving the jetty area. The  competition secretary has directed that anyone not so complying will not receive any points for that race. Any lipo considered to be puffed up or otherwise damaged will be condemned from any further use at the club.

I am really looking forward to seeing some close racing. Geoff Earl probably is going to be the one to beat if his body holds out for the season! Doug White has clearly the fastest boat and may feature in the mix if he sticks to the designated course instead of visiting Blackpool and all ports South. Keith has been experimenting with a new boat and we will have to wait and see how it does. No doubt Paul, Dave and John will all have something to contribute in the wacky world of club racing.

« on: April 06, 2019, 01:59:31 PM »
 Less than 24 hours to the first competition of the season. Weather forecast not brilliant but we will manage. I will be putting the course out around 8.30 but will need two people to help get the rowing boat out.

Club News and Events / Recent donation
« on: April 01, 2019, 10:52:06 PM »
Many thanks to George who has donated a rather large but very old boat hull, complete with a steam engine and boiler to  be sold for club funds.

 IO have managed to identify the engine, its a Stuart 'Star' engine built sometime between 1926 and 1939. Very collectable and on its own is worth around 250. After photographing the lot we will be putting it up for sale, probably on e bay.

We have been very lucky getting so many donations in recent years.

« on: April 01, 2019, 10:46:47 PM »
Just a reminder that next Sunday is the first steering competition. The water is not available for free sailing while the competition takes place.
Should be a good laugh with the new 'mines' being used.

« on: March 19, 2019, 10:36:01 AM »
Please note: The competition secretary has approved a change to the date of the first steering competition.

 IT IS NOW SUNDAY 7th April  NOT 14th

Club News and Events / club commitee-
« on: March 05, 2019, 09:05:03 AM »
To clarify the recent changes to the club committee.  (Changes between annual general meetings are allowed by the club constitution).
Commodore               Walter Snowden (no change)
Chairman                   Dave Nell
Secretary                   Ernie Lazenby (no change)
Treasurer                   Dave Moss      (no change)
Safety Officer             Les Ledger
Competition Secretary Dave Nell (no change)

Other members:
Chris Barnbrook          (designated steam boat boiler tester- previously appointed by the clubs committee )Stepped down as Chair.
Geoff Fish                  (no change)
Ken Smailes               (no change)
John Bailey                (no change)

Note. The safety officer has responsibility for ensuring the safe use of Lipo batteries at the club. Les Ledger has asked the club secretary, who has the experience and equipment, to continue doing that. Spot checks will be carried at any time and more regularly after a race.

The competition Secretary has asked the club secretary to assist him with the fast electric racing, air boat racing and the steering competitions. (No change to what has been happening in the past)

Pages: [1] 2 3 ... 21

Recent Topics

Scarecrow day by Walter Snowdon
April 23, 2019, 08:18:25 PM

John Cobbs Crusader jet boat - 48 inch long by Eddy Matthews
April 22, 2019, 09:44:49 AM

Club boat 'Kitty' by Ernie Lazenby
April 20, 2019, 07:14:20 PM

Some very good news by Eddy Matthews
April 17, 2019, 08:45:24 AM

Competition results 2019 by Ernie Lazenby
April 12, 2019, 04:08:20 PM

April 07, 2019, 10:28:15 PM

Recent donation by Ernie Lazenby
April 06, 2019, 02:33:22 PM

Race day is nearly upon us by Ernie Lazenby
April 06, 2019, 02:14:07 PM

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