Maritimo build

[Jeff Wohlt]

Your new shafts were mailed Saturday to your specs.

Found some new solder with 38,000# shear strength. Staybrite is only 1/3rd that. Forget all the non cadium crap....this is where the strength comes from and 8% silver....might need to have a gas mask but going to get some for cables. It is the cable that needs so much prep for good sticking...not the SS shaft.

Post a link to the vid...I do not find it.

[wolf IV]

Well i thought id give an update to 70 mph goal: Jeff wholt's fabbing two new shafts , they will be sent out to ed hughey for soldering /flex's & chuck egneg is working on a set of x442's detounged just like the old ones that hit 66.7 mph, and a set of 40 mm abc 3 blade props. Andi brown is also working on a set of x447's cut down to 42mm with a couple deg. Added , detounged and backcut.. Sooo, it looks as if ill have some testing to do... 70 mph here she comes!!! Will video in the next few weeks as testing developes. I can't wait.

[wolf IV]

thanks brother!!! dude dont waste your money, these 4s packs were like $60.00 ea. and work sooooo good!!!! 1/2 price!http://www.hobbycity.com/hobbycity/s..._30C_Lipo_Pack

[bonewar]

Wolf I'm glad you got her flying! good job dude.!!! 65 MPH CLUB !!!! Now next time you take a vid put the camera right next to you on the sand so we can see it going past on a side angle, will show how fast it really is. You have inspired me again to chase the 70 mph mark. I've just ordered some thunder power 30c lipos for my cat , and been fixing the drive line for less friction. I'm also going to buy a set of 35c lipo's for the Maritimo. I've got some new props coming from the prop shop 1417 counter rotating , These should get me closer. Be proud bro you have 1 of the nicest/fastest Maritimo's out there. AWESOME . Bonewar

[wolf IV]

Alright, put a vid. Link on the video section of the forum.. Enjoy!

[wolf IV]

Ok, i just looked at the video and its 5 min up to the crash. Ill try and edit it (cut out the rescue)( me swimming in a hurry) and then youtube it and put up a link. Listen to the reaction of people when it crashes. And i correct myself , the crash may have been more than 50!!

[domwilson]

Wow! You're almost there. Good Job! Any video? I think the X447's as described will get you there. Sorry to here about your GPS, but at least the boat is good.

[wolf IV]

Wwwwwwoooooooooooooohhhoooooooooo!!!!!!!!!!!!!!!!! ! 66.7 mph!!!!!!!!! She finally let loose with the cg adj with new 30c batts and fans on the esc's! It was shocking!!! . Goal met! She still runs really solid, but ran into problems crossing my wake at around 50-mph crossed up and barrel rolled.. But shes water tight. Had the scoop come off & lost the gps ;( just a lil epoxy and shes ready for another session. The highest speed came from the rist pass, luckly i checked the speed ( in shock) before the flip. I for the first time pre-heated my batts to 110 f. I sware by this now! After a full run the esc's- 120f, batt.s-125f,motors-90 f im so happy with her now!!! Im so close to 70 mph , egneg ill take the risk and watch the temps. Send me a price on the 447's, i will hit 70 mph.. Thanx guys!

[egneg]

The 442's were detongued but not back cut. If you are pulling 200a now 447's (cut down to 445, detongued, and back cut) might let the magic smoke out ... but there is only one way to find out.

[wolf IV]

Just post some video. How's that Elam coming along?

i took abreak from her.. ive lost two motors and two esc's.. ill get her rollin in a little while!! ive been messing with upgrades on my edf jets lately. she'll get wet soon !!!ill set up a video tomarow for you! should i have the 447's back cut as well?

[domwilson]

Just post some video. How's that Elam coming along?

[wolf IV]

by the way the 442's are back cut (egneg)...

[wolf IV]

http://www.rcprops.com/TechNotes/rcprop_tech_info.htm

______The Benefits of Removing the Tongue Area of a Prop______

Removing the tongue will reduce lift and increase low end rpm's. By removing the leading edge tongue area, it's more likely to slip at the low rpm launch, however at higher rpm and speed the tongue causes drag. Because the centrifugal force of the rotating prop at speed, throws the water away from the hub and tongue, towards the outer surface of the blades. This is why removing the tongue, generally increases rpm and top speed. I think this is important to understand. Also the tongue area has the lowest amount of pitch, which also adds drag at high rpm.

great info!! i new the basic ideas but didnt think about how it would reduce amp draw even while going up in dia.. ill give egneg a shout, thanks!!!

[domwilson]

http://www.rcboat.com/prop.htm

[domwilson]

http://www.rcprops.com/TechNotes/rcprop_tech_info.htm

______The Benefits of Removing the Tongue Area of a Prop______

Removing the tongue will reduce lift and increase low end rpm's. By removing the leading edge tongue area, it's more likely to slip at the low rpm launch, however at higher rpm and speed the tongue causes drag. Because the centrifugal force of the rotating prop at speed, throws the water away from the hub and tongue, towards the outer surface of the blades. This is why removing the tongue, generally increases rpm and top speed. I think this is important to understand. Also the tongue area has the lowest amount of pitch, which also adds drag at high rpm.