Prince Mono Hull

[Tony]

i have a 7xl in my 32" cat with a x642 was only pulling 79 amps max

I think you and i have the same 32" Apparition cat. I am running a 9xl with a x642 prop, and an ETTI 125 esc.

[ozzie-crawl]

yep same one

[ED66677]

edit!

[old yeller]

rcbt1111 ("Prince&quot: epoxy or polyester ?

mine is not for sure, smells almost as strong as polyester, I guess it's vinyl ester!!!

epoxy or polyester or vinyl-ester ?

well, mine is epoxy ... (my FRP / epoxy experience is in motorcycle component fabrication, and wooden boat restoration)

so I wrote r2hobbies for confirmation:

r2hobbies,
I am very interested in rcbt1111 rc boat offered for sale on your website,
and appreciate all the information included on your product detail page.
One question, however, remains unanswered.
The description claims: "Ultra strength high quality Fibreglass material".
Would the fiberglass reinforced plastic construction use an Epoxy or a Polyester resin ?
thank you in advance for your time and effort to respond.

and received this response:

From: [email protected]
Subject: Re: Product ID: rcbt1111
Date: May 13, 2009 11:37:54 PM GMT-04:00
Thanks for your email. Yes, the Epoxy is one kind of the Fiberglass which gives the best outfit to our products. I hope the information may help. Thank you very much! : )
If you have any questions, please feel free to contact us. Have a nice day!

Yours Sincerely,
Aure

http://www.r2hobbies.com

R2 Hobbies has a business arrangement with Oshmens Aviation.
Oshmens is responsible for the actual FRP construction of the rcbt1111 "Prince".

[785boats]

M.M.
In answer to your question about the 8XL, here's one of our club members boat with an 8XL on 4s. Don't know the prop though. Sorry. Probably an X640 or X642.
Paul.

http://www.youtube.com/watch?v=IDjcgq6zFzs

[M.M.]

Thats not that fast


Well i will see i if can get one. But if not what is a cheap motor? I dont need to be the fastest boat out there, i just want a reliable motor.

Also, what is a good mah rating. I've been looking at running 2 2s 5000, but wouldn't mind saving some money so what is a good mah rating?

[old yeller]

Steven Vaccaro's take on the rcbt1111 "Prince"

07-27-2008, 11:56 PM
"I ran one of those copy Delta force boats this weekend with the small outrunner motors.
The motor was 2700kv and ran a 3s 2500 pack.
It ran about 27mph with the outrunner but couldn't keep the motor temps below 160 degrees f. Tried a smaller prop, but the results were the same.
I swapped a 10L 380 Feigao and ran 30mph with temps in the 110 area with a water jacket on the motor.
Some thoughts about the hull and hardware.
First the quality of the fiberglass on a scale of 1-10 is about a 7. A few minor imperfections, but better than some of the hulls out there.
The motor, battery tray wooden mounts are a great idea, but only glued in. Mine broke away from the hull after the second run. This mount should be glued with some fiberglass cloth.
The flex shaft is a .150 cable with a squared end at the prop shaft. The prop shaft is 4mm.
The hull handles quite well and turns better than I would have thought without turn fins."

08-22-2008, 09:54 AM
"I have been running mine alot. The kids love it. Its very stable and quick. Best thing it runs on one pack. I'm trying to get the manufacturer to change some things. If they do I will buy them."

[ED66677]

Old Yeller, that's good info what R2hobbies replied!
IMO Steven should make some "budget" package, not necessary ARTR, but with higher quality components, DF hull, Feigao Motor... to compete these offer, I recently saw that BK in Germany offer some hight end RTR boat, the prices are hudge, 2000Euro!!! unbelievable!!!
There must be a market then!

[ozzie-crawl]

asked a friend of mine about the hulls being epoxy as his buisness is making fibreglass and carbon fibre parts for racing cars. he told me it was polyester. about 9 months ago i sent 10 emails to r2 hobbies about a newprop shaft even sent pictures and they kept asking me if i wanted a prop. not having a go at them but they are not rc boat people just a online store and dont know *!***!***!***!** about what they sell
scott

[old yeller]

polyester or epoxy ?

r2hobbies, the distributer, claims that epoxy resin is used in the construction of all boats they sell.
Oshmen's Corp Ltd, the builder of the hull, states "EP Fiberglass" as the FRP used.
I cannot believe that either company would deliberately misrepresent their product –
quite frankly, the rc community is just too small to get away with that kind of B.S.

I purchased a "Prince" from Head of the River (jhocheung) February 16, 2009 –
that hull is definitely epoxy.

ozzie-crawl says that his hull is polyester,
ED66677 that his is polyester or ?, but not epoxy.
I am not disputing either of these fellow modelers,
but just curious and hoping to make some sense of it all.
The 'facts' will have implications for those looking to buy a boat or hull –
and esp. those buying used.

The only conclusion that supports all the info would be that hulls of both materials have been sold.
Perhaps (given o.c.'s "about 9 months ago", and r2hobbies recent letter)
at some point in time, production materials changed from polyester to epoxy ?

Maybe a clue in a post by r2hobbies (rcgroups, Feb 2008):
"In fact, we got very good experience in making FRP sailplanes and gliders, which require very light weight, but high strength fuselage for the planes during aerobatics flying.
And this year*, we make use of our skills in FRP, and applying into the electric FRP racing boats.
There are several advances for using this type of Epoxy resin FRP in the boat..."

*my emphasis

[ED66677]

I may have a little bit more explanation, read this my DF copy is strong, that's for sure, and again when I received it and when I unpacked it, it smelled allmost like polyester, so being strong and smelly make me think it is made of vinyl ester epoxy, mine is a bit more than a year old and thinking it was polyester, I was expecting it to split or crack but it did not, good for the money is what I can tell about it!

[ozzie-crawl]

i think ed is rite that it may be a a vinyl ester epoxy
i have 2 of there hulls the prince 25 and the 32" cat. the prince seems to be made better.
either way the prince is one tough little rocket when setup well

[785boats]

Ozzie.
I would say they're 'Bulletproof' if you get my drift.
As for the epoxy/polyester thing guys. I bought mine from R2 Hobbies & I'm pretty sure it's epoxy. I've done a bit of sanding & drilling in the hull. The dust & tailings certainly didn't smell like polyester.
I've got a day off today so I'm going to attack the thing & put a flood chamber in it, & upgrade the stinger to a new 3/16 one. Might as well swap the Ammo for the 8xl while I'm at it to see how she flies.
Cheers.
Paul.

[old yeller]

...
I've got a day off today so I'm going to attack the thing & put a flood chamber in it...

good idea. take plenty-o-pics & share !

[B-DAWG]

I have one from head of the river. Mine is set up a little bit different than the r2hobbies one. I run mine on 3S 6500, hydra 120, and stock FSD motor (good to 50,00 rpms). It's a little rocket all and all for the money and a little work you can't beat it.







before I painted it (the hardware that came on it)