|john mccreadie||04/06/2019 20:52:40|
|1 forum posts|
I have an all wooden Perkasa which I built from a kit in the early 1980s and I would like to bring it back to life, but.
It is 30 inches long and I would like to know what scale it would be so I can fit realistic guns
It was never very fast and never got up on the plane, mainly because it has a lead acid battery, what would be a good combination motor, battery and prop.
As my first all wood kit I made quite a good job of it but it needs modernising so any help would be great.
|Roger Clark||04/06/2019 22:59:50|
252 forum posts
Hi John, I have a Perkasa that's about 40 odd inches long and is 1/24th so would guess yours is 1/35th, no doubt others will confirm or correct. .
|ashley needham||05/06/2019 09:10:31|
6757 forum posts
Hi John and welcome to the forum.
Ditching the lead acid battery would be a good start in the quest for performance.
we would want to know what size and voltage the sla is, and what motor/prop has been installed.
A change to a Nimh battery may halve or even take 2/3 the weight out of the boat with a corresponding performance gain and possibly no other work might be needed to give you a good performance.
Then it is a question of how fast you want to go. Certainly these boats can be made to go very quickly with brushless motors and Lipo batteries....it depends on how much you want to spend really.
|Dave Milbourn||05/06/2019 10:24:19|
4018 forum posts
If your model was built from an all-wood kit then it's probably the 1/32 scale Precedent kit, which was actually 37" long. Here is a link to every Thread on this forum with "Perkasa" in the title. You should find all sorts of useful information in there. Link to Perkasa threads
Edited By Dave Milbourn on 05/06/2019 10:28:51
|harry smith 1||05/06/2019 11:03:13|
|1040 forum posts|
Ditching the SLA battery and changing the motor, prop and speed controller is a big upgrade !!
So getting the right info will save you money.
The original Perkasa's would do 50 knots plus !!!
I have two 1/35 scale Perkasa's both with 37mm 3 blade props, 60 Amp ESC"s, 5800 mah Lipo batteries.
One has a 35mm brushless motor 3639-1100 Kv and the other a D3548/4-1100Kv.
Both get up on the plane and perform over scale speed.
Good run time of over 1/2 an hour.
Turning is not great as they like a long turning circle, but, can be help by raking the rudder forward by 6 to 8 degrees.
The balance point forward and aft is very important ,but, with access hopefully to under the forward gun you can move stuff around to get it right.
As the battery is the main weight problem.
As for moving guns you can use small servos, but, I am it to that.
|Will Mason 1||05/06/2019 23:03:52|
|8 forum posts|
I too have a Perkasa, the 46" fibreglass hull version. Originally my father and I built it in the 80's to take a 22cc petrol strimmer engine with centrifugal clutch and I sold in the early 90's. Roll onto around 2010 and I happened to speak to the person who bought it from me and ended up buying it back again. It needs a fair bit if work now, lots of bits have snapped off or been knocked off and I also want to convert it to brushless.
Nice to see there are still some Perkasa models about.
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