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MANUKAU MODEL POWER BOAT CLUB Inc

 

Web Site:

HTTP://homepages.paradise.net.nz/nickbree/mmpbc/

 (SOME PHOTOS MISSING)

Venue: Wattle Farm Rd Pond Manurewa

2nd &  4th Sunday of each month

 

Secretary:        Glen Sayers                 Editor   Chris Breen

                        9 Reyland Close                       86 Chivalry Rd

                        Manurewa                               Glenfield

                        Ph 267 2607                              Ph 4445 482                              March 2002

 

HOT NEWS

SEAFAIR TROPHY 9th & 10th February 2002

The Manukau Model Boat Club held the first round of the Hydrofeast Series and spent quite a considerable amount of time, effort and money in bringing the Regatta up to the required specifications as requested by the New Zealand Model Powerboat Association. It was extremely disappointing to see only 3 members, other than our own Club members take part in this Regatta as Steve has put a lot into this series and it has a lot of potential and caters for quite a few classes. Maybe the series could be revamped a bit with Hi-Points for all classes and double points for the first Regatta.

 

SATURDAY

Saturday bought us overcast weather with a slight breeze in the morning, picking up as the day went on. Several heats of 10min open Enduro were run during the day with laps being added together from each heat.

 

The Sport 45 1 lap shootout was taken out by Steve in O Boy Oberto, followed by Jason with his newly acquired ex Malcolm, ex Glen, ex Ralph, VXM powered Persidon. John was still running-in his CMB in the old, well raced but trusty Genesis. Actually later in the day, naturally after the racing had finished and with a prop change, Genesis started really to perform.

Steve dominated the heat racing and took out the final having plenty in reserve. Heard that Steve has a new version of this boat coming out soon and I’m reckoning that this will be a hard boat to beat.

 

SUNDAY

We were greeted with overcast weather, no rain and the wind quite still, with the breeze picking up later in the morning, actually just as the word “Hydro” was mentioned, the wind and waves decided to play up and make it really uncomfortable for the Hydros to perform properly.  Anyway, the Enduro was first up again and as Saturday, several heats were raced and the laps were accumulated. You can tell by the results that Graham had the run of the field and if I remember right, he won all the heats. Ohio Steel may not be Super Fast, but the boat consistently stayed right side up and finished all the heats.

As the results show, the 1/8th Scale Shootout was not run on the best of water, especially down the back straight were you really needed to back off a bit.

 

Chris (Llumar)broke his antenna in a spectacular flip early into the heat racing which put him out for the rest of the day (Editor’s note: NOT the one in the photos, that one is ANOTHER one). Malcolm and Merv, with new Hulls only launched the week before elected to not race them as they still had a few bugs to sort out.

 

 

With the heat racing starting, the water on the back straight was getting quite lumpy now. Steve had worked that with a light boat he had to take it easy down the back and using his superior speed, to try and make up the deficit around the rest of the course. The other boats, been heavier manage the back straight at a higher speed and could pass Steve, and this is were Mathew and John occasionally managed to overhaul Steve several times and I believe Mathew and I think John managed to rob Steve of a few 1st heat placing’s.

The final became all Steve’s in the end with John stopping and Mathew blowing out his plug.

Congratulation goes to Steve in taking out the Shootout, Heats and Finals for both the 1/8th and Sport 45

 

Thanks go to all the MMPBC Members who helped set-up and carry out official duties during the Regatta.

 

Editor’s Note: The record also goes to Chris for the highest day’s fines so far for buoy abuse - $20

 

TECH NOTES

Piston & Liner Matters

ABC or ABN  I'll count this as two different designs but really they are the same idea. Most manufactures today have adopted this type of piston liner fit for engines up to the .90 cid size. The letters stand for an Aluminium piston in a Brass liner that is Chrome plated. In the case of the ABN the last letter is Nickel rather than chrome.These liner fits rely on very tight tolerances between the piston and liner to provide the seal for the combustion process to take place.

I often have new  ABC or ABN engines returned by customers who are convinced there is something seriously wrong with the motor they just purchased since they are so tight when you try and turn them over. This tightness over top dead centre is perfectly normal and the squeaky-metal on metal feel disappears after a few minutes running.It's this tight tolerance that gives the superior compression ABC and ABN engines enjoy.

In my opinion the chrome plated liner is vastly superior to the nickel plated one since  chrome is a much harder surface than nickel and proves to be far more durable in use. OS is a manufacturer that has used nickel plated liners from day one and while having an excellent reputation for product reliability, their engines piston-liner assemblies do not last as well as some of the other manufactures. The nickel is a less expensive way to manufacture engines but in my opinion not a better way. Given a choice, take the ABC engine every time! The ABC or ABN engines are the best way to extract maximum performance from model engine since it is most efficient way to effectively seal the combustion chamber and increase performance.

 

They rely on the brass liner expanding just enough so that the aluminium piston doesn't gall or seize inside the liner when the engine is running. This type of design is quite tolerant of a lean mixture setting  without causing damage to the engine as long as you catch it early before the engine gets too hot. ABC's by their very nature will allow the piston liner to expand at a faster rate than the piston, causing the engine to lose compression and either slow or quit in extreme cases.

 

 Quite the opposite of an engine that uses a piston ring(covered below) This is a great feature if you are aware of the idiosyncrasies of this design. What should be avoided at all cost is breaking the engine in or running it at any time with a slobbering rich needle setting since this causes the engine to run too cool and the brass liner won't expand enough to clear the tight tolerance of the aluminium piston(galling-or seizing occurs).All these designs should be run on the lean side of rich--never 4 cycle an ABC or ABN engine with an overly rich needle valve setting!

 

Piston ring and Steel liner  Up until 5 years ago most engines used this type of piston liner seal on everything except the most high performance engines. They are typically easier to break in than an ABC engine, and in the hands of the sport flyer a better choice since they are so easy to handle. They were abandoned for a very simple reason--manufacturing cost. These engines have more parts and machining steps involved than a comparable ABC engine and in the competitive world of engine manufacturing two or three dollars saving when manufacturing a hundred thousand engines can make the difference between making a profit or not! These designs rely on a tempered steel piston ring that fits in a groove machined into the piston for the combustion chamber seal. Much cheaper to repair than an ABC engine if you damage this assembly since most of the time compression can be restored by replacing the piston ring by itself($25.00) versus a piston liner assembly on the ABC type($80-160) Not as efficient at sealing the combustion chamber as the ABC designs, this performance shortcoming is more than compensated for in ease of break in, cost of repair, and trouble free operation. Most larger engines, 4 cycles and helicopter engines still use this design for the reasons I've mentioned.

 

3) Steel piston Steel liner These designs are not in wide use any longer since the ABN and ABC piston liner fits accomplish a superior fit with much less break-in, albeit at greater cost. Since two similar metals are used for the fit it requires a great deal of careful running and break-in before the piston and liner are burnished to provide the seal required for optimum performance. FOX and COX are the only two manufactures I can think of off hand that still use these type of fits. In their defence, if broken in properly they provide years of service and are very cheap to manufacture.

 

Dick of the Day

Goes to Terry on Sunday 24 February for not tightening the plug, catching it in the air, but loosing the gasket !!

 

 

Notes from Race day on Sunday 24th February 2002

Today was supposed to be the Club Champs day but not many turned up so we decided to postpone the Club Champs Meeting until next fortnight  (10th  March) if the pond is still filled..  If this is not possible we will award 2001 prize-giving based on points up to and including Seafair Regatta.

 

Big thanks to Phil Leach for the stand and also the Burns for cooking..

 

Skulduggery, Pussycat, Lamborghini, PSL Construction, and L&P had some good non-point races.  Also a good Hydro turn-out although the wind discouraged us from racing.  Malcolms’s new MAC powered 1/8thMiller Light”looks quite lethal and my latest E-mail reports Merv recorded 91.5 kph in “Budweiser”, with reliable witnesses !!! Terry was also welcomed back with a new liner & piston in his 1/8thUltra Bold Dash

 

We ran 4 off-shore heats and a 30 minute Enduro.  Adrian blitzed the heats through consistent finishes and Chris blitzed the Enduro by staying right-side up right throughout. – (Editor’s note: Pity the points don’t count. )

 

SEAFAIR REGATTA RESULTS & POINTS

Remember, interclub regattas count DOUBLE points.

 

Open Enduro

Name

 

Total laps

Place

 

 

 

 

PointsTotal for the day

 

Graham

 

162

1st

 

 

 

 

20

 

Tony B

 

129

2nd

 

 

 

 

18

 

Chris

 

123

3rd

 

 

 

 

16

 

Brett H

 

52

4th

 

 

 

 

14

 

Adrian

 

51

5th

 

 

 

 

12

 

Wayne

 

38

6th

 

 

 

 

10

 

Jason

 

34

7th

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

Best Presented Boat

Name

 

 

 

 

Total for the day

 

Adriam

Lamborghini

1st

 

 

20

 

Wayne

Ohio Steel

2nd

 

 

18

 

Tony B

Zoom

3rd

 

 

16

 

Hydro Points

Name

45 shoot-out

45 Heats

45 Final

C Scale shoot-out

C Scale Heats

C Scale Final

Total for the day

Jason

2nd  18 pts

3rd  16 pts

DNF

 

 

 

34

Merv

4th  14 pts

4th  14 pts

DNS

DNS

DNS

DNS

28

Chris

DNS

DNS

DNS

2nd 18 pts

DNF

DNS

18

Malcolm

 

 

 

DNS

DNS

DNS

 

 

CLUB CHAMPS Programme

WE WILL ATTEMPT TO HOLD THE CLUB CHAMPS RACE DAY NEXT RACE DAY (MARCH 10th)

 

The programme for the meeting will run something like the following:

Note: No boats on the water until after Drivers-Brief and boat has been scrutineered, & DAY FEE $3 paid.

 

09.00 - 9.30am Set-up course

09.30 - 10.00 Boat scrutineering

10.00 –10.15 Drivers Briefing (It is important that everyone is at the briefing! No Brief – No Race)

10.15 – 10.30 Open Water Class 1&2

10.30 –11.00 Class 1 & 2 Sprint Racing

11.00 – 11.15 Open Water Hydro

11.15 –11.45 Hydro Racing 1/8th and or Sport 45 / Tunnels (NO Cats)

11.45-12.15 Class 1 & 2 Racing Enduro

12.15-12.30 LUNCH

12.30-1.00 Hydro Racing 1/8th and or Sport 45 / Tunnels (NO Cats)

1.00-1.30 Class 1 & 2 Sprint Racing

2.00-3.00 Hydro Racing 1/8th and or Sport 45 / Tunnels (NO Cats) FINAL TAKE ALL

3.00-3.30 Class 1 & 2 Enduro Racing DOUBLE POINTS

4.00 Clean up……..

 

Club Points Standings

(Editor’s Note: Previous errors corrected, no further correspondence will be entered into)

 

Driver

Boat

Total Enduro Points)

Total Sprint Points

 

Class I Off-Shore

 

 

Graham Doggett

Ohio Steel

226

42

Peter Wright

Obsession

129

47

Adrian Milanesi

Orange &white thingi

136

 

Adrian Milanesi

Lamborghini

158

48

Glen Sayers

Blue thingi

47

30

Wayne Lester

Bud Dry

68

34

Jason Lester

Coca Cola

102

27

Tony Webster

Martini Racing

 

17

Tony Belle

Blue & White sprint

213

70

Malcolm Miller

Skulduggery

326

72

Adrienne Kockott

Evoluzione

18

 

Tony Kockott

Tornado

18

8

Brian Nesbitt

Pussycat

205

17

Phil Leach

 

80

70

Russell Day

 

58

 

Jeremy & Brett) Harrison

 

50

43

Chris Breen

Lemon & Paeroa

112

75

 

Class II Off-Shore

 

 

Glen Sayers

Steves Model shop

26

 

Jason Lester

DeWalt

46

36

Malcolm Miller

Red Boat

49

 

Graham Doggett

 

 

8

Warrick Kockott

Coke

 

10

 

Hydros

 

 

Glen Sayers

York

 

10

Chris Breen

Black Fire

 

59

Chris Breen

Llumar

 

47

Jason Lester

Poisidon

 

63

Jason Lester

DeWalt

 

28

Merv Sowden

Radical Rat

 

57

Merv Sowden

Miss Bud

 

10

 

Text Box:

 

 

 

 

 

 

 

 

 

 

 

 
 

Close Start

 
 

 


Text Box:

 

 

 

 

 

 

 

 

 

 

 

Aerobatics

 
 

 

 

 


Well that is all for this newsletter people – Next Club Race Day is March 10th.

 

 

 

C Breen – Editor

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