RE: Roots Type Supercharger
The engine is a 50 cc twin. The RPMs should peak out around 7000. I would like to make the heads water cooled but I am not sure I can run a water pump with the blower pressure interrupting the normal pulse from the crankcase. And that brings another question: Will the pressure from the blower affect the carb diaphragm operation?
Posted on: 9/9/2012 12:03 AM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11222461

RE: Roots Type Supercharger
Here is a better picture of the engine assembly.
Posted on: 9/8/2012 10:59 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11222442

RE: Roots Type Supercharger
8Mills - Didn't mean to come off as upset. I was not in any way. I had just acknowledged the fact the I had it wrong. The dimensions of my design might help: The rotors are 1 inch in diameter and 3 inches long. I have my blower pulley half the size of my crank pulley. That is why I said 2 to 1 ratio. I will change it to a 1 to 1 ratio. I also made it a twin carb setup to help with the leaning condition that will happen under boost. I plan to have an incremental throttle on the second carb that is adjustable. Thanks everybody for all their help and keep it coming.
Posted on: 9/8/2012 10:50 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11222440

RE: Roots Type Supercharger
Thanks for your replies guys. I stand corrected. It is not a power valve. It is an exhaust cutoff valve. I did think about a barrel type valve like is in a rotary carb. I still have that design. That is similar to a butterfly valve. Your other point brings a new question. From looking at my design, can you suggest a drive ratio to accomplish 4 to 6 psi of boost. It is drawn with a 2 to 1 ratio for reference only. I think that will be a bit much but am not sure.
Posted on: 9/8/2012 7:08 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11222284

RE: Roots Type Supercharger
d-lo - Thanks for the encouragement. And that is an awesome ride!!!!!!!!!!!!!! As you can tell, I am still in the design/planning stage but I will keep everyone posted on the progress.
Posted on: 9/7/2012 10:50 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11221473

RE: Roots Type Supercharger
Thanks for the link. That is what I'm talking about. Look like it might be a place to start.
Posted on: 9/7/2012 7:30 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11221329

RE: Roots Type Supercharger
Specialk1 - Thanks for your reply, I know that will work but it is not the look I want. The pic I have posted is the look that I want. I want it to look like a blower and sound like a blower. I have a lot of work in front of me to get this to work, but I believe I can. I don't know how much boost I can achieve but I will do whatever I can to make this work.
Posted on: 9/7/2012 6:51 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11221296

RE: Roots Type Supercharger
I have finished designing what I think is an operational exhaust power valve. The way I am understanding this is: With the boost from the super charger, the exhaust gases with escape faster because of the pressure. If I set the timing of the power valve to close for the last half of the time that the piston is still open to the exhaust port, I should have time to add some boost to the charge that is entering the chamber. The power valve will open completely when the piston is above the exhaust port. Is my understanding correct?? I am posting an exploded view of my power valve design. Let me know what you think!!
Posted on: 9/7/2012 4:16 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11221136

RE: Roots Type Supercharger
Jackal1983 - I plan to install teflon strips on the edges of the rotors. This will help with the tolerance issue and with sealing. I also plan to add a "spray bar" in the system that will be dependent on available pressures that will spray more fuel as needed. I haven't completed the design for this yet but hopefully will have a drawing soon. I also realize that a 4-stroke would be easier, But that is not the "look" that I want. And I realize that RBInovations has a centifugal type supercharger but this again is not the look I want. This is more about the look than the amount of boost I will get. I do want it to boost power and by doing this I may stumble across some solutions that have been a problem with supercharging 2 stroke engines. I am sure that I will have alot of problems to overcome. Thanks for all you suggestions and comments. Please continue. Mike Moore
Posted on: 9/6/2012 1:45 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11219868

RE: Roots Type Supercharger
Here is an exploded view of what I have planned. Let me know if you see anything wrong with my design. The rotors have a 120 degree twist like the Eaton supercharger. I don't know if this will work on such a small ap[lication. Thanks. Mike Moore
Posted on: 9/6/2012 9:38 AM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11219564

RE: Roots Type Supercharger
8MILL - Love you handle. We need to talk because I have a Custom Gun business as well. Back to the subject - I am planning on doing this on a 50cc Twin. I am not looking for a lot of boost, Only enough to maintain the power at the same level with the Super Charger, maybe a little more. I am mainly aiming for the look and sound. I have some Ideas about exhaust valving and will be Drawing them in Solidworks over the next few days. Thanks for the offer of your help. I am sure I will be needing it. Off Subject. I will include a picture of my personal Rifle for you to admire...It is a 7MM STW on a Remington Action that has been completely blueprinted. It has a No. 9 Douglas Barrel. It has changed since this picture was taken. It now has a Proper Sniper Scope and a custom muzzle brake. It is deadly accurate. It only has a 5.2 inch drop at 500 yards with a 100 yard zero at 3440 FPS on my custom loads with a 140 grain bullet.
Posted on: 9/4/2012 9:07 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11217839

RE: Roots Type Supercharger
Hi all, Thanks for more replies. I do understand that it is at best a 50 50 proposition and that any gains would be used up by having to turn the supercharger with the engine, but gains are not the real reason I want to do this. It is the effect of seeing the blower on the engine as well as the "music" it will sing to you. If I could not lose anything in the process, to me that would be worth it. I really don't want to lose power. I am in totally new territory for me. I have been in RC for a long time, and I am quite good at tuning both nitro and gasoline engines. But know what to do verses why it works are 2 totally different things. I know what to do but do not always know why it works. Like all of us I am still learning. I will have my CNC up and operating in the near future and some of these things will be the first on the list that gets produced. I will have a lot of trial and error but that is where the fun is. What did someone say to Edison about how many prototypes he made before he made a working light bulb? Something like, It only took one to make it work but too how ever many to find out how not to do it. This is where I am and look forward to sharing my errors and successes with all of you.
Posted on: 9/4/2012 7:54 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11217776

RE: Roots Type Supercharger
Your replies have got me thinking. If there was a way to temporarily and extremely quickly to "block" the exhaust flow at the proper moment to allow some of the "boosted charge to remain in the combustion chamber until the piston clears the port. Would this work? I realize that this is also the time that the exhaust has to exit but if it were under "boost" then the exhaust gases would also exit more quickly. I have a few ideas on how to do this. I will do a drawing to see just how hard it will be, and let you guys know how it turns out. Thanks for you replies.
Posted on: 9/4/2012 7:45 AM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11216872

RE: Roots Type Supercharger
This is my idea of what it might look like!!
Posted on: 9/3/2012 7:50 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11216385

RE: Roots Type Supercharger
Thanks for the comments guys. I was talking about a 2-stroke but I may have to look into a 4 stroke to see what is available. I still may build an imitation one for my twin on my airboat just for the look!!
Posted on: 9/3/2012 5:11 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11216179

Roots Type Supercharger
Has anyone ever built a roots type supercharger for one of our gasoline engines? I just had a thought that it would be cool to do. I don't want to push too much boost but thought it might be something that would add some horsepower. All comments welcome!!!! Mike Moore Nashville NC
Posted on: 9/3/2012 12:56 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11215925

RE: Any Gas Outboards???
I am like most of you. The OB Tunnel has always been an awesome machine to me. The way it "flies" across the water and turns on a dime. There is just nothing else like it. I have an Aeromarine Cat that is nice but doesn't "do it" for me like my tunnels. I have a VS-1 With a TT-3.5 and an Illusion Tunnel with a Lawless G-Drive powered by a Bonzi BZ-1. I don't have anyone around here to run with but I still have fun all the same. But it would be more fun to run with some guys. Good thread Let's keep it going. Mike Nashville, NC
Posted on: 8/29/2012 11:25 AM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11210456

RE: Gas Jet Boaters
Thank you for your response. Those are the things I was looking at but I don't have alot of experience with a squirt boat.
Posted on: 8/27/2012 7:48 AM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11207536

RE: 50 cc Twin in a Twin Swashdrive Boat
Thanks for you replies. Those are the questions I was looking answers for. To cool the engine, I will make a water jacket system for the head.
Posted on: 8/26/2012 8:03 AM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11206403

RE: Gas Jet Boaters
Tried this in the main Gas Boat Forum but no response, so I will try it here. I have an idea that I have drawn up with Solidworks and would like you guys opinion. I have a plan for a 50cc Twin driving 2 Jet Pumps piped into 1 outlet and nozzle. Do any of you have any ideas about what I have planned or do you see problems with my design?
Posted on: 8/25/2012 8:19 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11206063

RE: 50 cc Twin in a Twin Swashdrive Boat
Thanks Goodson. It does have twin jets. I am thinking about piping the twin pumps into 1 output and nozzle. That is where some of my questions start.
Posted on: 8/25/2012 4:11 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11205860

50 cc Twin in a Twin Swashdrive Boat
I have been working on this idea. I have used solidworks to draw it out and want to know what you guys think of my design. It is still in the design phase so I am hoping for suggestions. Also, if you guys see any problems please let me know. I am going to put water jackets on the heads. My biggest question is: WIll I have an issue with the location of the suction ports? Thanks. Mike Nashville NC
Posted on: 8/25/2012 3:04 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11205798

RE: Radio Control Saving Lives!!!
Youtube also has the video. It is under RC Lifeguard.
Posted on: 8/18/2012 9:57 AM by Author "Mike2735" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11197847

RE: Radio Control Saving Lives!!!
http://www.yahoo.com/_ylt=AiGfj12SnLfEVAAUm9db5ACbvZx4;_ylc=X3oDMTl2c2dmYmp1BF9TAzIwMjM1MzgwNzUEYQMxMjA4MTcgbmV3cyByZW1vdGUgY29udHJvbCBsaWZlZ3VhcmRzIHQEY2NvZGUDcHpidWZjYWg1BGNwb3MDNjEEZWQDMQRnA2lkLTI1NzkyMDMEaW50bAN1cwRpdGMDMARsdHh0A05ld2F3ZXNvbWUmIzM5O2xpZmVndWFyZCYjMzk7BG1jb2RlA3B6YnVhbGxjYWg1BG1wb3MDMQRwa2d0AzEEcGtndgM5BHBvcwMwBHNlYwN0ZC1mZWEEc2xrA3RodW1ibGluawR0YXIDaHR0cDovL25ld3MueWFob28uY29tL25leHQtd2F2ZS1yZXNjdWVzLXJlbW90ZS1jb250cm9sLWxpZmVndWFyZHMtMDYyNzQ5NDczLS1maW5hbmNlLmh0bWwEdGVzdAM3MDE-/SIG=13d26pd1n/EXP=1345394530*http%3A//news.yahoo.com/next-wave-rescues-remote-control-lifeguards-062749473finance.html Let's try it this way. That did not work either. But if you go to Yahoo and look on the main page. Go thru the listings and you will see a Lifeguard RC Boat and the story.
Posted on: 8/18/2012 9:42 AM by Author "Mike2735" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11197841

Radio Control Saving Lives!!!
http://news.yahoo.com/next-wave-rescues-remote-control-lifeguards-062749473finance.html I saw this story and wanted to share some POSITIVE news about our hobby. Mike Moore
Posted on: 8/18/2012 9:33 AM by Author "Mike2735" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11197833

RE: Water pump port?
Thanks guys. Mike
Posted on: 6/1/2012 7:51 AM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11102401

Water pump port?
I now have a boat and am setting everything up. I ordered my engine a while back and did not order it with the water pump port installed. Where is the best place to install it? I have heard it can be connected thru the carb insulator or by drilling and tapping a hole somewhere in the crankcase, Which is better? Thanks. Mike
Posted on: 5/31/2012 5:27 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11101758

RE: Don Muddiman Flying Machine
I second that. I will wait as long as it takes to get one that is right!!! Thanks Don. Mike Moore
Posted on: 5/29/2012 7:47 PM by Author "Mike2735" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11099318

RE: Don Muddiman Flying Machine
Thanks for the update.
Posted on: 5/19/2012 4:29 PM by Author "Mike2735" in the forum "The Clubhouse"
http://www.rcuniverse.com/forum/fb.asp?m=11087069

RE: Question about flex shaft
Thanks Guys. Mike
Posted on: 5/18/2012 11:49 PM by Author "Mike2735" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=11086464