Search: Posts Made By: Got RPM
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05-18-2019, 12:52 PM
Replies: 5
Views: 173
Posted By Got RPM

Cool The owners manual clearly states that the drive...

The owners manual clearly states that the drive system must be lubricated after each day of running. This is likely the cause of the high pitched sound. It does not require the drive shaft to be...
05-15-2019, 06:03 PM
Replies: 5
Views: 190
Posted By Got RPM

We have to know several things before we can help...

We have to know several things before we can help you.

- what is your budget?
- what speeds do you want to see (realistically)?
- what run times are you looking for? Remember that the faster...
05-12-2019, 08:44 AM
Replies: 2
Views: 133
Posted By Got RPM

Mount the pickup as far back and as close to the...

Mount the pickup as far back and as close to the keel as practical.
05-04-2019, 12:24 PM
Replies: 104
Views: 22,587
Posted By Got RPM

Yet another needless death. How many does this...

Yet another needless death. How many does this make, just in this thread? Never swim for a toy boat.

https://m.facebook.com/groups/920032028083200?view=permalink&id=2196471590439231


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05-04-2019, 07:58 AM
Replies: 3
Views: 115
Posted By Got RPM

Cool Doesn’t really look like a Crab Skiff, just...

Doesn’t really look like a Crab Skiff, just similar. Totally different bow, bottom and stern.
...
04-20-2019, 06:44 PM
Replies: 21
Views: 9,468
Posted By Got RPM

This thread started 15 years ago and was last...

This thread started 15 years ago and was last updated 5 years ago. Which MRP boat did you own? In the 1990s I ran a Bud Lite OPC and a canard. Fun boats for the time but not very exciting today. ...
04-16-2019, 06:58 PM
Replies: 5
Views: 210
Posted By Got RPM

The Graupner drive system was known to be...

The Graupner drive system was known to be relatively weak with brushed motors. I am afraid that if the OP simply replaced his brushed motors with appropriate brushless motors and LiPo packs he will...
04-11-2019, 06:36 PM
Replies: 3
Views: 164
Posted By Got RPM

You can probably get by with 6S although 8S would...

You can probably get by with 6S although 8S would be better. A long 40mm motor with a Kv between 1000 and 1300 would work on 6S, but a bigger 700-800 motor on 8S would work better. (The original...
04-11-2019, 06:18 PM
Replies: 6
Views: 174
Posted By Got RPM

Cool Thomas, what does “a smooth cruise” actually...

Thomas, what does “a smooth cruise” actually mean? What mph does that mean? What is the scale of the ship? Do you know the number of blades and the pitch of the propellers? Exactly what batteries...
04-08-2019, 09:58 AM
Replies: 2
Views: 293
Posted By Got RPM

Sadly, this product has a reported poor...

Sadly, this product has a reported poor reliability history, see examples below. I doubt that there is a good solution.
...
03-30-2019, 07:15 AM
Replies: 11
Views: 217
Posted By Got RPM

Cool I’m a highly experienced fast electric boat racer...

I’m a highly experienced fast electric boat racer (30+ years) and there is some pretty sketchy information in this thread. And there are more important things to worry about than connector size. One,...
Forum: RC Airboats
03-17-2019, 04:37 PM
Replies: 8
Views: 514
Posted By Got RPM

I use both 2-blade and 3-blade props on my...

I use both 2-blade and 3-blade props on my airboats, whichever works the best. Know that the 3 blades give more thrust for the same diameter, and draw more amps. Your setup should draw around 15...
Forum: RC Airboats
03-17-2019, 06:40 AM
Replies: 8
Views: 514
Posted By Got RPM

Wow, you haven’t given us much at all to go on. ...

Wow, you haven’t given us much at all to go on. What motors - size and Kv? What voltage? What ESCs? What packs? What size boat?

Brushless motors - just reverse any two motor wires to...
Forum: RC Airboats
03-05-2019, 06:27 PM
Replies: 5
Views: 652
Posted By Got RPM

About 25 years ago I built a 48” airboat using a...

About 25 years ago I built a 48” airboat using a 4-cycle lawnmower engine in the flat bottom hull with a chain drive to a prop in an elevated pod. The prop was about a 24”x10”, can’t remember for...
09-12-2018, 04:44 PM
Replies: 2
Views: 309
Posted By Got RPM

Blank page. .

Blank page.





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07-18-2018, 02:50 PM
Replies: 4
Views: 456
Posted By Got RPM

Exactly what boat do you have? What motor and...

Exactly what boat do you have? What motor and prop? We aren’t mind readers. 115-130*F is a pretty wide range, which is it? The armature looks okay, DO NOT remove the balancing epoxy!

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05-12-2018, 12:31 PM
Replies: 4
Views: 995
Posted By Got RPM

That’s a LOT of steps! I have no experience with...

That’s a LOT of steps! I have no experience with that hull, but some hulls with lots of steps have trouble turning.


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05-12-2018, 12:30 PM
Replies: 4
Views: 995
Posted By Got RPM

That’s a LOT of steps! I have no experience with...

That’s a LOT of steps! I have no experience with that hull, but some similar hulls with lots of steps have trouble turning.


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05-10-2018, 09:56 AM
Replies: 1
Views: 541
Posted By Got RPM

Cats are air compression hulls so any fast cat...

Cats are air compression hulls so any fast cat can blow over. Your experience is odd since I’ve been racing my Motley Crew (same as Lucas Oil) against the ProBoat cats and don’t see much difference....
03-20-2018, 10:14 AM
Replies: 8
Views: 678
Posted By Got RPM

Wink ;) .

;)

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03-20-2018, 06:01 AM
Replies: 8
Views: 678
Posted By Got RPM

There is more to motor performance than watts and...

There is more to motor performance than watts and rpm. The OP will likely never find an R/C motor capable of turning a 6” x 6” prop at 3000 rpm, certainly the noted Turnigy motors won’t do it as...
03-10-2018, 06:26 PM
Replies: 5
Views: 469
Posted By Got RPM

You never want to run an electric motor out of...

You never want to run an electric motor out of the water for more than a few seconds. With no load all the electrical power will be converted into heat within the motor. This could be the OP’s...
03-10-2018, 04:44 PM
Replies: 6
Views: 833
Posted By Got RPM

A 36” tunnel will not run well at all on 4S,...

A 36” tunnel will not run well at all on 4S, neither an OPC nor an offshore hull. Amp draw will be very high and prop size too small for efficiency. (The little 4S motors do work well on hulls in the...
Forum: RC Airboats
03-10-2018, 04:32 PM
Replies: 10
Views: 1,103
Posted By Got RPM

Indeed - the OP hasn’t posted since 2009! Doubt...

Indeed - the OP hasn’t posted since 2009! Doubt he’ll get any benefit from the recent posts.




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03-08-2018, 07:01 PM
Replies: 7
Views: 645
Posted By Got RPM

A lot depends on the size and type. With that...

A lot depends on the size and type. With that low Kv you will likely be limited to outrunner motors. No problem other than cooling which is a challenge with outrunners. I run outrunners in several...
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