Grimracer prop

[Luckystattoos]

I know this has been gone over and over and I have read all the threads. I have set up my strut according to the reccomendations and then some. I cannot get the boat to plane. I can throw the stock prop on and bam its on its way....I am lost guys. I have the 3 blade grimracer that is reccomended for this boat...please help.


Thanks

[Ub Hauled]

what kinda adjustments did you make to the Grim prop once you have it installed?

[Luckystattoos]

I have not done anything to the prop itself only to strut depth and angle.

[Capt. Crash]

I have my 40x57/3 @ 1 1/16" top of table, to bottom of hull with the shaft strut sitting on the table. I also sharpened/balance the prop. I have to goose it full throttle from a dead start to get it up out of the water...you can't do it gradually.

[detox]

Have fun sharpening that DULL prop. A dull prop will cavitate badly. My L40x57/3 prop was very dull from factory and difficult to sharpen perfectly.

Look here:http://www.aquacraftmodels.com/acces...op-tuning.html


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[LuckyDuc]

Have fun sharpening that DULL prop. A dull prop will cavitate badly. My L40x57/3 prop was very dull from factory and difficult to sharpen perfectly.
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I have to agree. I'm in the process of sharping one right now for testing. It is very DULL... rounded edge dull. I've spend quite a few hourse working an edge on it.

[egneg]

I have to agree the props are dull, thick, and need a lot of work. They look nice out of the box but don't let that fool you into thinking they're ready to go. I use a 1" belt sander with 120 grit to start with on the face then a file to clean up the hub and trailing edge. Once that is done I start the finishing process with 220 wet/dry on the face to get the deep scratches out. Now I use 400 and then 600 on the whole prop. Remember to keep checking the balance after the initial thinning and sharpening.

[jingalls007]

I've had the same issue, thick prop, hard to sharpen. stock prop works real nice!

[LuckyDuc]

I've had the same issue, thick prop, hard to sharpen. stock prop works real nice!

The stock prop does perform nicely, but they don't seem to last long. Mine threw a blade after 8 runs.

[LuckyDuc]

Progress after 4 hours of balancing and filing an edge. I still have some more work to do.

[Brushless55]

Looks Good!

[longballlumber]

I just finished running my UL-1 for the first time and I had very good results with 42 X 55 (2 blade)

[LuckyDuc]

I just finished running my UL-1 for the first time and I had very good results with 42 X 55 (2 blade)

Glad to hear that the maiden went well. Are the Grimracer 2 blades any easy to sharpen than the 3 blade lifters?

[longballlumber]

I didn't have a GPS or a radiar gun, but the 42x55 was MUCH faster than the stock. Plus the boat handled pretty good with that prop. It was running a little loose for my liking as a heat racing setup. Right now my strut is 1" with no angle at all. I will end up putting about 1 degree of angle next.

I think so... Like you an many other have mentioned, it takes time. I royal screwed up a 40X57/3 yesterday by trying to get into a hurry.

I have an M440 that I would like to try, but it needs to be S/B'ed to.

[detox]

My Grimracer L38 x 55 moves UL-1 faster than my Grimracer 42 x 55.