Protos 450 !

Just been talking to Matt at Midland heli's and he has told me they now have the Protos 450 in stock, hmmmm I thought so i went to the website to check it out. having looked at the manual I see that the main gear and tail is driven by the same belt using tensioners.
Im not keen can anybody tell me differently please as i prefer torque drives as Ive had various problems with tail belts on 500's and 250's etc let alone having a belt drive off the motor !

[robgt]

It is how MSH have always done it (with their Protos 500).
It means less gear noise too, so it runs quieter.
I'm sure it will work very well. I've flown the Protos 500 and it was ballistic.
They take special care to ground the boom as well, so static buildup can be avoided.

Cheers,
Rob

[J-S-Q]

I've read that belt drive is more efficient than gears -whether that's actually true though is another matter! I would have thought you should also get less vibration from the drive train.

[raptorheli2]

is this thing 3s with 325mm blades?

i.e have they missed the boat when "450's" should be 350mm and 5/6s?

cheers

[dumb thumb it]

hi

yep it has 325 blades but you can run it on 3/4 cell lipos.

[raptorheli2]

so no 350 blades?

cheers

[dumb thumb it]

so no 350 blades?

cheers

no mate i comes with some new 325 slim profile sabs, but you do get FB / FBL head in the kit as standard which is good, not that ive been looking lol for full spec check out msheli web site there is a manual down load ect ,think iam going to down load it and take a look

alec

[raptorheli2]

i won't waste the bandwidth to get the manual if it's not 350mm blades :-)

i had a look on the website today and only seen a mention of 325's so i assumed that was the max-very happy to be wrong here....350's are the future.

cheers

[bolders]

I've read that belt drive is more efficient than gears -whether that's actually true though is another matter! I would have thought you should also get less vibration from the drive train.

Text books normally state that spur gears have an efficiency of 98 - 99%, hering bone gears (like logo) have 96 - 98% efficency and belts have approx. 96 - 98% efficiency so there really is not a lot of difference.

Belts generally do have lower vibration transmission characteristics than TT due to higher damping characteristics, so it will not transmit such large vibes from the tail for example.
However a belt does have a tendency to create a certain amount of vibration. It will tend to vibrate laterally (ever watched a belt on a car) due to it going from (theoretically) zero accelleration to some finite centripetal acceleration, when it switches direction (i.e. whenever it passes over a roller).
However I guess you could also argue that a TT generates vibration due to the fact that they are rarely totally straight.

i won't waste the bandwidth to get the manual if it's not 350mm blades :-)

i had a look on the website today and only seen a mention of 325's so i assumed that was the max-very happy to be wrong here....350's are the future.

cheers

Protos do a stretch kit for there 500 (converts from 425mm to 470mm baldes)

MSHeli Srl Helicopter Model Company Homepage

If the 450 is setup to be able to run of 4S there is always a possibility they will release a stretch kit in the future.

I look forward to hearing more on this heli - it would be good to have another option other than the 450 pro. Will have to see how it flies and what the spares prices are like

[kenny.c]

Has anyone on here flown one yet....??

Ken

[Mike W]

Think Mat Watkin might have at the weekend as I know he has been building it over last week .. From the sounds he was making when we was chatting he thinks its gonna be awesome .. .not avant awesome but awesome in its own right

[kenny.c]

Good point....saw his picture of the kit on Facebook......wander if he will leave some feed back somewhere...The 500 is good so no reason the 450 wont be.

Ken

[Mat the splat]

Hi
Thought i would get some pics for you, mine is ready to go, just need to find some time
Went together very easy and feels very light but havent weighed it yet.
I Will get a video of it when its flying
Will check tomorrow if you can get 350mm's on it.
Regards
Mat W

[Rob Barnes]

Nicely put together mate !

[kenny.c]

I like the motor shaft support.....nice touch...

Ken