MANUKAU MODEL POWER BOAT CLUB Inc
Venue: Wattle Farm Rd Pond Manurewa
2nd & 4th Sunday of each month from about 10.30 am
President: Malcolm Miller Editor Chris Breen
93 Sykes Rd 12 Sunset Rd
Ph 268 2742 Ph 4445 482 December 2002
Our new driver’s stand should be operational for the December 8th race day.
The following discussion makes good reading – I hope my editing has not stuffed up the author linkages – when I copy from the lisbot I get a lot of surplus crap that must be edited out – now pay close attention,
I have just purchased a new piston and liner and need to know how to lap them in. Do you guys use a special paste?? Rod_Geraghty
Not only do you use special lapping compounds you also need the right tools like helical laps and corkbond stones.
If you don't have these tools you are better off to do nothing and just run the motor in with lots of fuel [rich] and lots of patience [thermal cycle the motor].
What motor brand is the P/S going into? John_Ackerman
For Gods sake listen to him.... If you use a compound and try the lap the piston to the sleeve the piston becomes the carrier of the compound and you will actually remove chrome from the sleeve... I have a sunnen hone and helical laps.. The two parts never touch each other..... Run it rich as Rod said... Do not lap those two parts together. Richard_Beals
Rod or John.. Can you do a follow up on the proper way to "Thermal Cyle" Peter_Batt
OK guys, I understand what you are saying.The piston is out of a Picco EXR. At the moment the piston only goes about half way up the liner. Just feels waaay too tight.
Wash it real well with hot soap and water and then tell us how high it goes... or did this piston not come with this liner? John_Ackerman
Thermal cycling: This ought to stir up some folks.. lol
We do this on a test stand with a cooling system where we can turn the water off and on.. However... now we need to do this in the boat. If you have an on board mixture control it makes this a lot easier. Go to about three quarter throttle and have the engine four cycling.. (lots of smoke). As you enter the corner lean it so it cleans up. As you exit the corner go back to the smoke setting... As you enter the next corner lean it once more and rip around the corner. Now richen it once more for the straight away. Always lean the engine at the entrance of the corner and rip around the three buoys... then richen up once more for the straight aways.. Two to three tanks on a really tight engine. Make sure the initial start is deadly rich. That start is what makes or breaks bushed connecting rods lower bushing break in .. lol Use a glove and take you belt after thirty seconds of this rich idle and gently pull on the belt to put a slight load on the engine. this helps with the rod break in. No glove and smoke will come from your fingers as the belt cuts and cauterizes the three fingers all in one operation... Trust me on this.. lol lol Dennis Cessna
Listen to them. Sounds like you have a good piston and sleeve. dennis cessna
Ok last resort.... Take a piece of 600 wet or dry sand paper. Cut about two inches of it in a quarter inch strip... Fold it in half... Put WD40 on the paper only... Now holding the piston take the paper on a forty five degree angle rotate the top 1/8" of the piston only in the paper. About three turns and that will be it... Then wash it in hot soap and water and see how far it goes up in the liner after that... It may not help it at all as the tops of the EXR's have had that done to them from the factory.. Can't hurt it however.. let us know what happens after that... lol This is a band-aid method of fitting.. lol lol Not highly recommended... Commonly known as the "pond fit" lol lol lol. Dennis Cessna
Put the piston and sleeve in the engine and torque the head bolts. Sometimes the Piston will fit better when the head bolts are tightened correctly. Just a thought. Dennis
Your absolutely right Dennis... However,,, that tells me something is our of whack somewhere to make that happen. Top of the case.. bottom of the liner, top of the liner, Base of the head button, top of the head button,, and finally the cap itself... lol lol However,,, worth a try.. Sounds the old K&B days huh Rodney? lol lol lol Andy Brown
Wore out 400 grit and WD40 at the Huntsville pond. Put it to the Picco 80 piston before and between four runs that finally produced the 117.8 mph pass back 1998. Classic "pond fit". lol lol Andy Brown
Thermal Cycle on the water..
Is this done with the water hooked up or restricted ?? John_Ackerman
Hooked up but restrict it some.. The bigger the engine the more water you will need.... On outboards I have taken the water line off and done this... twenty engines need very little water... so incrementally go to more water the bigger the engine is... Peter_Batt
Thanks for the replys everybody.it was very helpful.
I tried the sandpaper trick and it worked a treat.
Thanks again all advice is appreciated. John_Ackerman
That's great... Now go through the rest of the exercise as written above and you should have a good engine that will last a long time...
Racing on Sunday 10 November
Windy day (Aren't they all at this time of year) saw us proceed straight into Offshore Class 1. An excellent turn out of boats with 12 boats to contest the heats, although not all competed. As usual we mixed up the fleet into heats of around 5 or six boats maximum.
Malcolm with Skulduggery
Graham Ohio Steel
Dean with new sprint cat Romper Stomper and Drago II
Bruce with Victory
Phil with PSL Construction & his new twin CMB cat
Tony with Excitor
Chris with L&P
Merv with Video Express
As usual the windy and rough conditions caused a significant attrition including a MOST unusual capsize by Graham in Ohio Steel. Almost every one else wiped out at least once, but it IS unusual for Graham!
Miscreants for the day were Malcolm with two buoys hit and Graham (?) with one.
Some brave souls took advantage of our partially completed driver's stand but the pit men had to cling to the railings! Timber work virtually complete apart from the last few pallings for the hand rail, and yet to be back-filled, but there is little doubt it will give us the best venue in the Country.
Diamond Cup Hydro Regatta at Hakanoa & Hamilton 23 & 24 November (by Malcolm Miller)
Representing our club at this event were Chris Breen, Merv Sowden and Malcolm Miller, originally scheduled to run at the main lake in Hamilton it was decided to move racing to Lake Hakanoa in Huntly due to water conditions at Hamilton being unfavorable for hydro racing.
Saturday morning greeted us with perfect conditions for racing with a light breeze and flat water. The first event to run was B hydro with Merv our only entrant in this class with his scale 45, frustrated by a cooling problem his boat was running off song. The next event run was B scale hydro 1 lap shoot out with Merv claiming 2nd.Merv competed in the scale 45 with mixed results.
The next event run was C hydro with Merv running his new outrigger hydro. By now the breeze had strengthened and the water had chopped up making driving a little more challenging with three starters in the first heat Merv took out the heat win and managed to finish 2nd overall. Next up was the 1 lap shoot out for 1/8th scale in choppy conditions. Chris was forced to withdraw with mechanical problems in Llumar, Merv had Miss Budweiser flying but was unable to run a tight course due to the conditions, Malcolm with Miller High Life claimed 1st with the flattest water conditions. Heat racing was run in variable conditions as the wind and chop came and went with Merv gaining enough points to qualify for the final and Malcolm having to win the consolation heat to qualify. The final started with six boats Merv stopped, Malcolm finished 2nd.
It was agreed that the offshore racing be moved to Hamilton lake for Sunday.
The lake conditions were flat when we arrived but the locals promised some wind and waves by 10am and we were not disappointed. With 12 starters, racing was split into two groups for two 15-minute heats with Malcolm as our only entrant. The first heat was fairly uneventful with the conditions being good. Heat two had an added obstacle in the form of sailing dinghies tacking through the back of the course on their way to a mark making driving very challenging, and Malcolm gave an impromptu display of aerobatics by barrel rolling twice and continuing. Heat three was run as 30 minutes with 9 starters due to retirements. This heat was also plagued by the dinghies sailing through the course making for some hairy moments for both models and the dinghies, final placing after 1-hour of racing saw Malcolm in 2nd place overall only 2 laps behind the winner.
Thank you to Steve Trott for another well organised regatta.
On-line catalogue for Octura parts
Guidance for PITMEN
Some guidance for Pit men
Apart from helping start the boat, launching and retrieving, the pit man's most important task is a second pair of eyes for your driver. – Most of the time you should NOT be looking at his boat !! You should be keeping the rest of the course under observation and listening to what the other pitmen might be saying. You should constantly glance between your driver’s boat and say half the course ahead.
KEEP TALKING TO HIM
For Example; say we are on lap 3. You will have already told him to "stay tight on the buoys" and then, when he is half way around the top bend and soon to enter the front straight, Glance down the front straight and tell him the "Front straight is clear", OR, "you will come up on Graham going slow at the end of the front straight", or "dinghy is in the middle of the straight, slow down but stay tight on the buoys. Or perhaps “there is a dead boat in the middle of the next turn , you have to stay real tight or go real wide and SLOW DOWN.”
Once you see or hear of a dead boat, keep aware of any drift. Tell him: "Dead boat at end of back straight, this time go real wide."
Most drivers also find it valuable if their pitman talks almost non-stop "easy turn ( ie don’t turn too sharp and hook), OK, straighten up , out a bit…, out a bit…, go out…, out…, OUT, (which means if he doesn't, he will hit the next buoy and that means $5 fine !).
FOR SALE/WANTED COLUMN
Following request is from Brian Dougan a fellow boater from down country, well known to us hydro guys !!
We have a new club member and wondered if you could put an add in your
newsletter for a used boat wanted.
Nothing to wonderful, Vee hull or similar with motor. Radio gear not
Contact myself @ or phone.
Now, seeing as only Malcolm and Merv ever give me copy and I don’t have any new pictures, here are some BAD jokes… If more will be too intolerable, send me copy for the next newsletter !!!
1. Two vultures board an airplane, each carrying two dead raccoons. The stewardess looks at them and says, "I'm sorry, gentlemen, only one carrion allowed per passenger."
2. Two boll weevils grew up in South Carolina. One went to Hollywood and became a famous actor. The other stayed behind in the cotton fields and never amounted to much - he became known as the lesser of two weevils.
3. Two Eskimos sitting in a kayak were chilly, so lit a fire in the craft. Unsurprisingly it sank, proving once again that you can't have your kayak and heat it too.
4. A three-legged dog walks into a saloon in the Old West. He slides up to the bar and announces: "I'm looking for the man who shot my paw."
5. Did you hear about the Buddhist who refused Novocain during a root canal? He wanted to transcend dental medication.
6. A group of chess enthusiasts checked into a hotel and were standing in the lobby discussing their recent tournament victories. After about an hour, the manager came out of the office and asked them to disperse."But why?" they asked, as they moved off. Because," he said,"I can't stand chess nuts boasting in an open foyer."
7. A woman has twins and gives them up for adoption. One of them goes to a family in Egypt and is named "Ahmal." The other goes to a family in Spain; they name him "Juan." Years later, Juan sends a picture of himself to his birth mother. Upon receiving the picture, she tells her husband that she wishes she also had a picture of Ahmal. Her husband responds,"They're twins! If you've seen Juan, you've seen Ahmal."
8. These friars were behind on their belfry payments, so they opened up a small florist shop to raise funds. Since everyone liked to buy flowers from the men of God, a rival florist across town thought the competition was unfair. He asked the good fathers to close down, but they would not. He went back and begged the friars to close. They ignored him. So, the rival florist hired Hugh MacTaggart, the roughest and most vicious thug in town to "persuade" them to close. Hugh beat up the friars and trashed their store, saying he'd be back if they didn't close up shop. Terrified, they did so, thereby proving that Hugh, and only Hugh, can prevent florist friars. (Editors note – try saying that one quickly!)
9. Mahatma Gandhi, as you know, walked barefoot most of the time, which produced an impressive set of calluses on his feet. He also ate very little, which made him rather frail and with his odd diet, he suffered from bad breath. This made him ....(Oh, man, this is so bad, it's good)......A super calloused fragile mystic hexed by halitosis.
10. And finally, there was the person who sent ten different puns to his friends, with the hope that at least one of the puns would make them laugh. No pun in ten did.
Next Race day is December 8th
Next Testing day is ecember 22th
Chris Breen – Editor