Wow, Watching Inside RC.....

[ThunderHawk]

I was just watching a "dual motor" race boat that hit speeds of 85mph. My question is, How do they sync the 2 motors? Is it a matter of tuning them individually? You would think that if the RPMs did not match that they would work against each other? Anyone care to give me the low down on this? I have also seen this in the R/C drag cars and find it interesting. Thanks Guys!




Hawk

I am really wanting the Aquacraft Miss Vegas....But the Nitro V looks good too...

 

[Lessen]

The carbs are linked together. They are opened simultaneously. That ensures that they both open at the same rate. However, the tricky part is tuning so that they are both opening the same amount. I had a twin engine truck a couple years ago that I gave up on. The MFR that made the conversion didn't supply a "tie-rod" syle linkage, just a standard piece of threaded rod. I never made the change but I certainly realized the advantage of using an opposite threaded rod between the carbs.

 

[ThunderHawk]

Thanks Lessen, I can see that taking some time to tune....I wonder if you woulld want to break in both motors at the same time??? If one was a bit more "touchy" than the other that could be tough....


Hawk

 

[Lessen]

I didn't. I broke them in seperately. I don't think breaking them in together would be a good idea. small differences in the pinch or the carb could create one to be running quite differently from the other. I think the safest way to go is break them in seperately then tune them to match after.

 

[ThunderHawk]

That does make sense...I bet the power would make it all worth it when it worked out ok. I know that boat was flying!!! I have to wonder if there would be a larger mill that would weigh the same as the 2 and have equal output...especially in a boat. I don't know much about the RC Boats yet but I figure 2 shafts/props would be better than one? Is there a way to convert the power to two shafts in a boat like they do in a 4x4? I will have to surf the web and see if there is any info on this. I think it would be interesting to see whats out there.


Hawk