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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 1/8th “Miller 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 1/8th “Ultra 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 |
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 |
|
|
Well that is all for this newsletter people – Next Club Race Day is March 10th.
C Breen – Editor
F:\My Documents\CHUFFS\mmpbc\March2002\march2002newsletter.doc