NAMBA October 2020 Web.pub

PROPWASH October 2020 5 Missing getting out to the races, being able to see our friends and purely just getting out of the house seem to put a great toll on a lot of people. Surprisingly going through the year we managed not only maintain our membership numbers at the same level as last year, we actually increased which is a great thing for the district this year. We welcome our new members to the District 7 family. We unfortunately lost a long time member this year in Mr. Louie Baumann. Louie was a founding member of the Lone Star Model Boat Club (Houston) over 55 years ago with a passion for both scale and full size boat racing. Louie was both a NAMBA and IMPBA member making boats a hobby and a career. He died of natural causes at the age of 87. Rest In Peace Louie. For the most part we did not stop persevering in trying to put on races, and at the same time putting preventative measures in place to help stop the spread of COVID. Its been tough considering even our local ponds were closed to testing and tuning. Keeping that in mind we have been taking every possible precaution that we can to make people feel safe at the race site. Now it appears that a lot of the restrictions are being lifted in Texas. The numbers for gatherings are being increased and we can actually start to get out and take part in our hobby. In District 7, we have been lucky in some respects to be able to put on a race in Amarillo in August. The Flying Dutchman MBC put on a great event with lots of fun had by everyone. After so many months it was nice to see some of our boating friends that we had not seen in a while. The biggest comment that was made was how nice it was just to be able to get away. Of course all social distancing through the pitting areas, face coverings and sanitizing stations were followed. We also reduced the number of boats in the heats setting a maximum of five. This way we were able to spread out through the driver stand to maintain more distancing. I would like to thank everybody that showed up to the Amarillo race and did their part and followed the guidelines for us to be able to hold the event. The next race that we had scheduled on the calendar was to be held in Carlsbad, New Mexico but unfortunately the state of New Mexico is not opening up as rapidly as the state of Texas so we decided to do some rearranging and after contacting various clubs and various locations we decided to hold another race back in Amarillo. And again, a big thanks goes out to the Flying Dutchmen club of Amarillo putting on another race on such short notice. The last race of a shortened season will be held in Dallas, Texas on October 3rd and 4th along with our annual district meeting. This will conclude our point series racing for 2020 as we look forward to moving rapidly into 2021. I would like to thank everybody from within our district and outside of our district that have helped me through this year. We have tried to keep motivated and positive towards moving forward in the future. I am sure that we all look forward to getting out in the world and resuming our racing schedules and our friendships with people throughout the hobby in 2021. In Memory of ….. By Dennis Probst Jr. NAMBA District 1 Director Earlier this year we lost long time model boater Lee Parker. Lee was a NAMBA member and member of the Del Val RC Model Power Boat Club for seventeen years. During his passing, his wife Dottie had been hospitalized with Covid-19. Lee’s son Bob had to inform Dottie by telephone of Lee’s passing. Because of COVID, he was not allowed in the hospital to tell his mom in person. I can not imagine what that must have been like. I felt so sad. Dottie made it to rehab and was out of the main hospital and then sadly, 22 days after Lee passed away, she did as well. Not from COVID but from a broken heart! They were married for 66 great years. She would sometimes be at the lake reading a book when Lee was running his boats. She always seemed happy that everyone enjoyed her being on the sidelines watching, always talking to me and everyone else. Bob told me that when he found his dad, he was laying in bed looking to his left and later found out that Dottie was looking to her right. When he told me that I had a warm feeling deep inside that made me believe they were never apart from each other in the spiritual world. God Bless them both and their two sons Bob and Chuck. The Nitro Engine – Part 5 By Lohring Miller NAMBA Safety Chairman Scavenging the cylinder has received more attention in two strokes than any other subject. There is only about 1/2 of a revolution available in a two stroke to get the exhaust out and the mixture in. Not only is the time short in a two stroke; there is no positive piston action to help. A four stroke devotes a full revolution for this; the full upstroke for exhaust and the full down stroke for intake, both mechanically forced by the piston. So how do engine designers do this? It all depends on directing the various flows. How the pipe helps was explained in article number four. The idea is to create a rising flow of mixture in the cylinder that pushes out the exhaust gasses without loosing too much new mixture. This mostly happens when the piston is at the bottom of its stroke. Transfer Ports All high-performance small engines use a variation of the Schnuerle scavenging system. This system uses a flat or domed piston with two or more ports angled away from the exhaust port. Simple porting ( Continued on page 6)