New homemade bullet outboard
- Topicstarter Dim L
- Startdatum
I really like your design.
And make me want to build one myself.
I specially like the flex shaft angle .
Must be way more forgiving then my k&b 7.5.
Wo tents to eat flex shafts with the 4082 1520 kv motor mounted.
I think I go order a nice piece of carbon fiber sheet and try to build one to.
Keep us posted with your progress.
[emoji1303]
And make me want to build one myself.
I specially like the flex shaft angle .
Must be way more forgiving then my k&b 7.5.
Wo tents to eat flex shafts with the 4082 1520 kv motor mounted.
I think I go order a nice piece of carbon fiber sheet and try to build one to.
Keep us posted with your progress.
[emoji1303]
Thank you very much Alex!
Indeed, this outboard has even larger angle (~ 115 degrees) than my previous one (~113) and the reason is exactly to protect the flex shaft and increase efficiency.
The "plans" are available in previous posts so you can get ideas.
The critical point in this construction is to glue the turn fin, the brass tubes, the carbon fiber plates and the U shaped aluminum in a straight line.
All other parts are relatively straightforward.
Indeed, this outboard has even larger angle (~ 115 degrees) than my previous one (~113) and the reason is exactly to protect the flex shaft and increase efficiency.
The "plans" are available in previous posts so you can get ideas.
The critical point in this construction is to glue the turn fin, the brass tubes, the carbon fiber plates and the U shaped aluminum in a straight line.
All other parts are relatively straightforward.
Dirk Jan
Forum veteraan
Yes, really good looking! [emoji108] What thickness of carbon plate did you use?
And how will you mount the motor to the leg?
Regarding the flex shaft angle, I think for the life time, it is more about the radius of the bend than the total wrap angle.
Let's say, the radius of the bend is 100mm, it does not really matter if the wrap angle of the shaft is 45 degrees or 180 degrees.
In other words; it is really important to use a nice continuous bend.
For the flex shaft resistance, the total (wrap) angle reduction will also help.
And how will you mount the motor to the leg?
Regarding the flex shaft angle, I think for the life time, it is more about the radius of the bend than the total wrap angle.
Let's say, the radius of the bend is 100mm, it does not really matter if the wrap angle of the shaft is 45 degrees or 180 degrees.
In other words; it is really important to use a nice continuous bend.
For the flex shaft resistance, the total (wrap) angle reduction will also help.
Thank you Jan!
I use 2 mm cf plates which is strong enough and easy to cut. If necessary I glue two parts with epoxy to make a 4mm plate.
The motor will be mounted using a 4mm cf plate which will be screwed with 4mm screws exactly where the arrows show
This makes sense Jan for sure. However, given the limitations to the size of the outboard, and consequently the length of the radius, wouldn't be better to have a larger wrap angle?
I use 2 mm cf plates which is strong enough and easy to cut. If necessary I glue two parts with epoxy to make a 4mm plate.
The motor will be mounted using a 4mm cf plate which will be screwed with 4mm screws exactly where the arrows show
This makes sense Jan for sure. However, given the limitations to the size of the outboard, and consequently the length of the radius, wouldn't be better to have a larger wrap angle?
Goodmorning!
This is another "simple" outboard construction from which we can take ideas!
It is the less scale look than all other outboards but this framework is a
good starting point to start "building" a leg around it.
https://www.insaneboats.com/product/insane-pro-f1-tunnel-drive-unit
Thanks,
Dimitris
This is another "simple" outboard construction from which we can take ideas!
It is the less scale look than all other outboards but this framework is a
good starting point to start "building" a leg around it.
https://www.insaneboats.com/product/insane-pro-f1-tunnel-drive-unit
Thanks,
Dimitris
Laatst bewerkt:
you will not see that when your boat passes with 80+ km/h
Hahaha yes sure! We will probably get more satisfaction with a 80Km/h pass than a scale look!!!!
Yes and is also relatively easy to build, since the most difficult part of the construction, the strut, is readily available if you do not wish to build it!
Nice motor ,Dim[emoji1303]
Thanks Jan 
!
I have a 5S (previously a 6S but I removed one of the cells because it was inflated) and I want to try it first
.
Perfect! It will the first diy "insane style" O/B. I believe one of the main advantages of thwlis setup will be its low weight.
!I have a 5S (previously a 6S but I removed one of the cells because it was inflated) and I want to try it first
.Perfect! It will the first diy "insane style" O/B. I believe one of the main advantages of thwlis setup will be its low weight.
Looks good ,and it seems to bee well mounted with 6 bolts [emoji6]
It sure looks slick !
It sure looks slick !
Looks awesome!
Where did you buy this outboard
Where did you buy this outboard
Dirk Jan
Forum veteraan
It looks great [emoji108] I wonder, how did you bend the flex shaft tube? Probably with the teflon liner and the flex shaft inside it? I noticed even with the very shallow bend in the WildThing shaft the tube flattened a bit in the bend.
I'm looking for a good pipe bending tool for small diameter pipes. I have also seen a spring-sleeve that you slide over the pipe and then bend it. It was sold out unfortunately..
I'm looking for a good pipe bending tool for small diameter pipes. I have also seen a spring-sleeve that you slide over the pipe and then bend it. It was sold out unfortunately..