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MANUKAU MODEL POWER BOAT CLUB Inc

 

Web Sites:

HTTP://www.voyager.co.nz/~gasayers

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

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                              October 2001

 

HOT NEWS

Club Day 9th September

On Sunday we had 16 boaties with 22 boats. (Just about as many competitors as this years Nationals)

We started with several rounds of the Class I & II 10-minute enduro’s, that had one Class II boat and twelve Class I boats which were split into two groups. Racing was intense and consistency again played its part with Graeme taken the overall honours.

Some of the Highs and Lows from the Enduros:

Peter in his Class II Cat just held of a group of fast charging group I boats to take a heat win. Phil having his boat left by the rescue dinghy to sink. Malcolm had another unfortunate day with his crankcase cracking and retiring for the rest of the day. New Member Brett clocking up his first heat win.

Scale Hydros          

           

A couple of the Scale Hydros did a few demo runs before Lunch and at the next club day they will be starting a series of heat racing as described elsewhere in the Newsletter.

Sprint Racing

 

After Lunch Class I & II experimented with some 5 lap sprint races that everyone seemed to enjoy and will now be incorporated with the enduro in the days racing programme. Points for the sprint racing will be allocated for a new Trophy

After the Sprint races we had open water for the remainder of the day.

Merv (Club Captain), decided after the Club Day with the Club growing bigger all the time to call the Racing Committee together to put together a more entertaining programme for racing which is printed elsewhere in the Newsletter.

World Cup Hydrofest Regatta at Hamilton (22,23 September)

Two of our members took boats to Hamilton for this Regatta. Merv took his new Stealth Sport 40 and his 1/8 scale “Miss Budweiser”, While Chris took his 1/8 scale “Llumar” and his Off-shore Cat “Lemon & Paeroa”. The Saturday (Sport 40 racing) was windy and racing was moved to the quieter side of the lake. Unfortunately Merv was hit by another boat and suffered substantial damage to his orange Sport 40 hydro.

Keep out of that Rooster Tail !!!

 

Sunday dawned fine and sunny and proved a much better day for the larger class racing. Merv split the seam on one sponson but still managed to win the last-chance heat and do well in the final. Chris had a good day only missing one heat through a dud plug. Unfortunately our performance in the off-shore was a flop with radio problems in Lemon & Paeroa but Chris did win second prize for “Best Presented Off Shore Boat”

Text Box: Hydros at Hamilton

 

TECH NOTES

Here is a tip that will help you. If you have pipes that have dents in them like I do, put a stopper in both ends and fill with water. Put the pipe in the freezer and the ice will remove the dents. Cool huh....?

Marty Davis"

This does work great, but you must fill the pipe according to the size of the dent. If the dent is small, stand the pipe on end with the dent(s) closest to the bottom and only fill the pipe to just above the dent. For the very best results check the pipe every 10 -15 min. If the Dent is huge or the pipe has been run over by a TRUCK, you can still fix it, but you will need to completely fill the pipe and repeat the process until the pipe retains it's original shape. If you mess up and blow it up like a balloon. Try it out anyway. It may run better then Stock!

Go Fast, Andy Brown

tips from MWD discussions group http://rcboat.com/

Propellers - The real business end of R/C Hydros

by Don Mock

No matter how well an R/C Unlimiteds racer is prepared, (having a powerful engine, perfect hull set up, great driving skill, etc.), without the right propeller combination, the winners circle will be difficult to reach. Just like in the full size unlimiteds, propellers are one of the most significant elements to success on the race course. For scale hydro racers, it can sometimes be difficult finding the right prop for their particular boat and for the various conditions.

A surprising number of model boat racing propellers are available from companies, like Octura and Prather. Props come in two and three-blade versions with various pitch and diameters cast out of beryillium copper, brass or stainless steel. Racers must balance and sharpen new props to get optimum performance. Since many of the factory props are proven winners, most drivers race the props stock. However, some modify their props in various ways like re-pitching or cupping the blades.

There are a lot of variables that play a role in a prop's performance. One principal element is the hydroplane's hull. Weight is an obvious factor, but how the boat rides or "flies" on the water also determines the best prop selection. Boats that are heavier than average might still be able to use props reserved for lighter boats if, at speed, the hull rides light on the water. The opposite is true for light boats that ride "hard," making them difficult to push across the water. Weather and altitude also play large roles in the choice of props. Engines develop less horsepower in warm weather and at higher elevations. On the R/CU race circuit, for example, Spokane, with it's higher elevation, or the hot weather in Tri-Cities can send racers running to their tool boxes for smaller props. It's interesting to note that most model boat straightway records have been set in the winter months or on cool days.

Another aspect of weather that effects prop selection is wind and waves. Racers will often "prop down" when faced with rough water conditions. With a smaller prop, the boat can race at a safe and slow speed and still maintain engine RPM. Traveling slow in rough water with large props risk bogging down or even killing the engine.

One important characteristic propellers possess is "lift". On hydroplanes, the prop not only pushes the boat forward but also lifts the transom out of the water. Thus, the term "prop rider". The prop literally pushes itself half-way out of the water and, in conjunction with the sponsons, supports the boat on it's cushion of air. Lose a prop at high speed and the transom drops sending the bow skyward into a likely "blow over". Scale hydro racers choose props that generate the correct amount of lift for their hull. Three blade props have a tendency to create more lift than a two blade and when a boat experiences too much prop lift it can ride too hard on it's sponsons causing loss of speed. The depth and the attack angle of the prop can be modified on scale hydros by adjusting the strut ,which supports the prop shaft. There are two more basic approaches used by scale hydro racers to select props. One is to use the largest prop that the engine can turn. This usually means the driver will lengthen the tuned pipe in the boat allowing the engine to develop more torque with lower RPMs. This set up can supply a lot of power and straightway speed but may not be a quick accelerator out of turns. The other approach is to use a smaller prop with a shorter tuned pipe length allowing the engine to wind up more RPMs but with less horsepower. This set-up can make a hydro accelerate quickly, due to less load on the engine, and help keep the power up in the turns. Sacrificed top end speed is often the down side of this combination. Most racers find themselves balancing out these concepts, striving to hit on that magic formula that works best for their particular hull, engine and driving style. In the end, spending a day at the lake, testing different propellers, strut settings and tuned pipe lengths is the only true way to find the best combination that can put an R/C Unlimiteds racer in the winner's circle.

Race Committee Meeting (Merv, Terry, Jason, Wayne, Chris)

With substantial numbers of boats now appearing, we need to tighten up the control during both club days and race days (Remember POINTS RACE day is the SECOND Sunday of the month, FUN day is the fourth Sunday of the month). The need for better organization was clearly demonstrated on a recent Race day when we had a couple of unfortunate but completely avoidable accidents. Experience also shows that accidents are more common during open water. The object of the following is to keep it fun but without the tears and un-necessary expense.

Therefore, effective immediately, we will observe the following at all club meetings:

Driver’s Brief

Before any boats are permitted on the water we will call a short Driver’s Briefing to explain the program for the day, and any particular rules of the day. We will endeavour to set up a White Board listing race times, Tune-Up Roster etc.

Scrutineering

Before boats are permitted on the water they will be scrutineered. This is carried out at all inter-club regatta events and is good practise. The inspection is not onerous and verifies the following:

Rudder and throttle linkages are sound & secure (ie boat is safely driveable)

Rudder and turn fins have a safety kick-up action

Radio Frequency matches the peg taken from the peg board

Radio range check is satisfactory (works at 9 m range with antennae down)

Noise is within limits.

Note: The scrutineer will be sensible about these aspects, but if your boat fails scrutineering permission to run your boat may be with-held until the end of the day, lunch break etc.

 

Text Box: Skulduggery almost airborne

 

PITMEN

From now on ALL DRIVERS while on the water must have a pitman in support. THIS ALSO applies to practise/tune-up periods and Open Water. The newer guys should be aware that the older guys are only too pleased to help you. Most of us have already had unpleasant experiences when we wished we had had a pitman.

OPEN WATER & PRACTISE/TUNE-UP Periods

We will limit the number of boats on the water at one time to 6. This means that we are likely to have to rotate practise periods for the more popular classes. Those not driving will be expected to pit for those that are.

HYDRO PRACTISE & TUNE UP TIME

3 Point Hydros only. (similarly no hydros permitted at other times)

Infringement Fines

Partly to bolster club funds so we can build the driver’s stand, but also to acknowledge the expense some members have funded from their own pockets, there will be fine of $5 imposed for damaging the buoys through careless driving or repeated collision. A similar fine may be imposed for blatant excessive speed around dead boats and particularly the rescue boat.

RACE FORMATS

Discussion on whether we change the race format suggests we keep at least one enduro race per race day, but include more sprint races.

Enduro races may be a 10 or 15 minute non-stop, or 30 minute with a compulsory fuel stop. The object is to complete as may laps as possible from “HANDS OFF…READY…GO”

Sprint races will be 5 or 6 laps, starting with the tape count-down. The objective is to perfectly time your start to the hooter and then be in front of everyone else after 5 laps.

Bad Driving Habits

Without naming names, a few poor driving habits need to be eliminated:

No zig-zags to kill time (remember the slot-car track)

Reduce speed near dead boats and the rescue boat

No Lane Zero overtaking (If you are faster than the boat in Lane 1 you must overtake on the outside, not the inside)

THE PITMAN

The Pitman is your most valuable bit of equipment. More valuable than that grunty new motor, more valuable than that Star-Wars radio transmitter. If you finish you race your Pitman has done his job, if you win, he has done his job well. Your Pitman is your second set of eyes and ears, while you watch your boat and the area immediately in front of it.

Your Pitman should talk to you all the time you are on the water. He should be constantly glancing around the course and telling you things like:

The water ahead is clear” (all other boats still running and you are unlikely to catch anyone soon)

Slow boats ahead, half a lap”(you will soon catch up to a couple of slower boats)

Stay tight” (hold a lane close to the buoys)

Go Wide & slow” (hazard ahead, keep an outside lane and slow down)

Tony is catching you” (hold your course, stay in your slot-car lane)

Go for it” (You are past the hazard and the way ahead is clear)

Dead boat at the end of the back straight, hug the buoys” (The dead boat is out wide, slow down and hug the buoys

Rescue Boat on the Back Straight” ( Get ready to slow down and watch out for big waves)

One minute to Go” (One minute of race time to go)

Last lap” (That’s four laps out of five, don’t blow it now !!! a DNF is worth nothing)

When you boat dies your Pitman will call out “DEAD BOAT, LANE 1, END OF THE FRONT STRAIGHT” and will make sure everyone else has heard him.

On starting, your Pitman will launch your boat for you and then move to stand behind you. He will advise you whether you will be late or early for the start and will suggest a quick or slow final circuit.

And you will thank him after the race.

Programme

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

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……..

Note: No boats on the water until after Drivers-Brief and boat has been scrutineered.

SCALE HYDROS

 

Heat Racing:

Each month the points from heat racing will tally up towards the Hi-Points Trophy

(Years Racing)

Final Heat:

Winner Take All Final will be the Final Heat of the Scale Racing

(Must have raced in the heats to qualify)

List of Competitors, frequencies and boats

New guys should try to select a free frequency

Malcolm                    40.850             Skulduggery    C Deep Vee

Glen                          40.830             Dealer             C Deep Vee

Graham                    27.145             Ohio Steel       P Deep Vee & Blue Thingy C Cat

Larry                         27.255             Wild Thing       P Deep Vee

Tony                         27.145             Martini P Deep Vee

Russell                     27.045             Knacker           P Craker Box

Jason                       40.970             Coca Cola       C Cat

Phillip                        27.175             Yellow/Red      C Cat

Tony                         40.670             Splash Zone    C Cat

Chris                                    29.905             L & P               C Cat

Brian                         27.255             Pussycat         P Cat

Adrian                       40.670             #97                  P Cat

Brett                         27.045             Ballistics          P Cat

Peter                                    27.095             Obsession      B Cat

Wayne                      29.985             Pennzoil          A Deep Vee

Graham                    27.145             Zip-A-Dee        A Deep Vee

Merv                         40.810             1/8th Budweiser

Glen                          40.830             1/8th York

Chris                                    29.925             1/8th Llumar

Merv                         40.810             Radical Rat II

Glen                                                  Persidon ?

Chris                                                Black Fire

Club Points Standings

(Editor’s Note: I hope there are not too many errors but no correspondence will be entered into)

Driver

Boat

Total Enduro Points)

Total Sprint Points

 

Class I Off-S

   

Graham Doggett

Ohio Steel

170

25

Peter Wright

Obsession

113

19

Adrian Milanesi

Orange thingi

220

18

Glen Sayers

Blue thingi

47

 

Wayne Lester

Bud Dry

33

 

Jason Lester

Coca Cola

94

 

Tony Belle

Blue & White sprint

147

25

Malcolm Miller

Skulduggery

282

 

Brian Nesbitt

Pussycat

205

17

Phil

 

14

20

Russell Day

 

58

 

Jeremy (Brett?)

 

16

22

Chris Breen

Lemon & Paeroa

34

29

 

Class II Off-S

   

Glen Sayers

Steves Model shop

26

 

Jason Lester

DeWalt

46

17

Malcolm Miller

Red Boat

49

 
 

Hydros

   

Chris Breen

Black Fire

 

40

Chris Breen

Llumar

 

9

Jason Lester

DeWalt

 

28

Merv Sowden

Radical Rat

 

10

Merv Sowden

Miss Bud

 

10

Note: Points now also being awarded for Overall Placings in away regattas, and for assistance with set-up and take down on race days.

Well that is all for this newsletter people – Next Club Race Day is October 14th

C Breen – Editor

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