HDR Pr0j3ct RpM TWIN

[KenOlvis]

Thought I would post it as project takes place

Roughing in sponsons will be 1" foam glued to both sides with support wood in center

 

[ALLAN YUEN]

Thought I would post it as project takes place

Roughing in sponsons will be 1" foam glued to both sides with support wood in center

20150216_142424-1.jpg

20150216_142451-1.jpg

Good for you so will be excite with JAE Twin what size engine will install?

 

[KenOlvis]

Thought I would post it as project takes place

Roughing in sponsons will be 1" foam glued to both sides with support wood in center

20150216_142424-1.jpg

20150216_142451-1.jpg

Good for you so will be excite with JAE Twin what size engine will install?

FYI its not a JAE

Home design silly. Power by 2 uctkam 1.5cc

Namba A class rigger

 

[ALLAN YUEN]

Thought I would post it as project takes place

Roughing in sponsons will be 1" foam glued to both sides with support wood in center

20150216_142424-1.jpg

20150216_142451-1.jpg

Good for you so will be excite with JAE Twin what size engine will install?

FYI its not a JAE

Home design silly. Power by 2 uctkam 1.5cc

Namba A class rigger

Oh I see !

 

[KenOlvis]

....

 

[KenOlvis]

Shaping in front sponsons note were the motor mount holes are on the tub. flywheel well be at back edge of sponsons.more shaping an curves coming next on sponsons

 

[KenOlvis]

Tub 31"long

Waiting for props an shafts to determine where to place struts

Going to run 1 ski in middle of tub ill attach with screws so i can remove for testing

 

[brad nichols]

Interesting looking sponsons! More work to sheet than ellipticals on the KEP's. Nice!

Brad

 

[KenOlvis]

What is the average weight of a 21 rigger an what is a little weight for a 21 rigger?

I dont want to make a fat twin!!!!!

Ken

 

[Kevin Krogness]

just a guess but probably around 4.5 pounds and under 4-3.5 would be on a diet

 

[KenOlvis]

Waiting on other 1.5 uctkam to arrive

 

[mtruex]

Looks awfully big for those tiny engines!

 

[KenOlvis]

Looks awfully big for those tiny engines!

Its going to be lite.im going to shorten it up about 4"

 

[KenOlvis]

Looks awfully big for those tiny engines!

MartinI decide to shorten it to 28" now shape the front sponson thinner

 

[Glenn Quarles]

just a guess but probably around 4.5 pounds and under 4-3.5 would be on a diet

My twin 12 was a little over 3lb ready to run if that helps any.

GQ

 

[KenOlvis]

just a guess but probably around 4.5 pounds and under 4-3.5 would be on a diet

My twin 12 was a little over 3lb ready to run if that helps any.

GQ

Glen That is a nice goal to hit.

Thxs for sharing tech. Info

 

[KenOlvis]

Looks awfully big for those tiny engines!

MartinThese big enough if the 1.5 uctkam dont work out.

Thxs

Ken

 

[KenOlvis]

Updated HDR RpM Twin Tub

 

[KenOlvis]

Up Date I was curious about the weight it will be few oz. Over 3 lbs not bad for a twin 1.5 uctkam Pr0j3ct RpM Im using JAE 12 sponsons lite.

 

[Hammerhead]

I think having the lightest boat can be over-rated.

My .12 is more than 4 lbs and it will do 60. It is extremely competitive. Won NAMBA 8 High points in 2012 by several thousands of points.

My .21 weighed in at over 6.5 lbs and was 37" long. (This boat is my Avatar) and Won NAMBA 8 High points in 2012 as well.

The .12 I'm building now has a tub that is 27" with a total hardware included length of 30". I believe it will do even better.

I guess lighter may be better if you plan on running solo. If you want to win races consistently, lighter is not the key.

BTW it is so cool to see people building from scratch. Looking good HDR.

Marty