• If you log in, the ads disappear in the forum and gallery. If you need help logging in or getting registered, send request to: webmaster@southernairboat.com

Blue Lighning Belt Drives

G

gotbait

Well-known member
Will the blue lighning work on older motors or just the new ones/if so do they have a 1-5-1 or 1-77-1? :?:
 
Why would you want such a low ratio? The Blue Lightnings highest ratio right now is 2.38 and that's what I would run on anything! More gearbox ratio means more prop and that means more thrust.
 
Answer the mans question---he wasn't looking for a lecture......Charles (who would answer his question, but I don't know the answer...)
 
Just trying to help the man build a better boat Rugtar and that's all! I have seen 30 to 40 people go from a 2to1 and then a 2.68 and spend more money doing it and they all said I wish I got a 2.68 in the first place!
 
Reason so low I have a new 72 sp and wive said belt drive or prop not both with low ratio I can max pitch in prop and run it. :oops:
 
Thanks for the link Coondog. That is one impressive unit. It looks small and light weight. I could start thinking about a car motor with a device like that. Those big props run at low speed which means less noise and less complaints. I think they have a winner here. Now if they could make one for an aircraft engine to turn a big prop at low speed.
 
I gotcha thunder---I'm one of them...lmao. Had a 2.09, then a 2.38, now a 2.68! Its the mack daddy in my view. Charles
 
i have the blue lightning as far as i know iits only available in 2.3to1 at this time it will bolt right up to the chevy small block i spin 3 82 inch ww sirious wide blades 5200 rpms on the factory mark, wot its a good set up imo its lighter than a gear box and absorbs less hp than a box hope this anwsers your ? if not talk to bob hoover he will give all the imfo you need
 
Is this big enough prop for an aircraft 80in
skinning_hog_at_Al_s_010.jpg
 
Actually no it not big enough, I have one on my aircraft motor and I have max on the pitch still maxing the tachometer. Probably go to a 4 blade.
ticket_010.jpg
 
It will but Bob Hoover believes that the a 4 blade falcon will out perform a super wide. I just want the best all around performance.
 
In some areas the 4 blade will perform better and in some the three super wide will perform better I tend to run my boat more often where the three blade run's better , thats a matter of preference anyway I didn't see a four blade on either of them boats! I have ran both on the same boat with an onboard computer and I have also seen what happens on a true thrust tester when you add a blade and I doubt any body can say what the difference is with adding one blade unless they have ran a thrust tester like Mike built! That sled proved with out a doubt props should be chosen more from preference and specific needs then by thrust performance!
 
Remember, the ratio of the lycoming gear box is 1.77.........engine turns 3400....
tip speed, box ratio, engine max rpm all come into play to get max thrust..
 
Ton's of things come into play. Also remember the A/C makes more torque then the car motor so your running the 1.5 and your typical car motor running a 2.38 come out very close to the same torque output at the prop shaft! As with everything the bigger something is the less efficient it is that's where the props and gearboxs change everything! Bigger props and bigger ratios are less efficient, there are fine lines everywhere that you don't want to cross.
 
You must log in or register to reply here.
Back
Top