My son is running a Delta Force 67 with an old CMB 45 EVO on 40% nitro.The prop we have found to suit the combo best is an AB X450/3 pitch 3, 8.
The boat has been very stable and very fast with this propeller.
Today we hooked up the AB 5083/3 prop. When I launched the boat the water was like mirror and the prop seemed too heavy, as we could not get up the revs. The roster was high (more than 12 feet) and the speed was not what I would call fast. After a couple of rounds the boat itself had made some waves and that was enough for the boat to rocket away.
I have never seen such a difference from a prop to another and this prop is the right prop for our application.
The rooster was very low (a guess would be 2 feet) and very short.
I can highly recommend this prop for the DF/CMB combo.
The boat is now superfast and super stable and my son said it was like driving a bigger boat.
What other props do you recommend for us to try Andy?
Rudi,
Thanks for the report!
That is a very interesting result. The Delta Force must be a clean running hull. Most monos can not get enough bite with that prop.
We have two other 50mm props that are geared more toward the mono. The first is the
5077B/3
It has less transom lift and a little more blade area to provide a good hook up fo the monos, cats and tunnels. The next prop is the
5074C/3. this prop has even less lift, much more blade area and progressive pitch to provide the best possible hook up fo high drag monos. This prop will also provide excellent thrust in rough water conditions.
When your weather becomes hot this Summer you may also do well with the
4773A/3 or the 4773B/3. These props will hook up just a little easier the the
5083A/3 that you have tested and be a little easier to pull when you have less horsepower due to hot weather.
Good boating,
Andy
I was out running my sons Delta force today and hooked on the two props you recommended 4773A and 4773B
The 4773 A was a ok prop, good grip, quick launch and handling, but lack off the real high top speed. It was a ok all round prop.
Switched then to 4773B prop. I was not able to get the prop to hook at all. Only cavitated. I tried too toos it, give full throttle when launching. I even try to set the boat on water as it was idling.
For this application the prop is useless.
For now I have 3 propellers that are working, X450/3 pitch 3,8" I have the 4773A prop, and then I have the 5083 being the fastest prop over the two other. Launch is equal between the Octura and the 4773A. The 5083 need a little longer time to get a grip. The 5083 is an great prop when there are choppy water, and that leaves the Octura to be the best heat racing prop.
