Location: Bossier City, LA
My Posts This: Topic Forum Very cool.
Oh and to answer the question, HPM is not necessarily for beginners.
Essentially, SWM is eCCPM, and HPM is mechanical mix. I've done a lot of posting on the pros and cons of each. Don't let anyone tell you one is superior to the other for all uses. It's like front or rear wheel drive. Both work, each does something better than the other. Each has it's strong and weak points.
No need for expensive or matched servos, can have different servo types on each control if desired without ill effect
easier to setup
hirobo HPM models are essentially interaction-free, no cyclic to collective interaction, no cyclic to cyclic interaction, no collective to cyclic interaction
can 3D with the best of them with only the tiniest loss in collective speed.
If you love mechanical engineering, they are something to admire.
If you are on a budget, go with HPM. They tolerate stretching servo life better, and you can get away with a good bearing/digital servo (some of which run 50 bucks or so).
HPM CONS: A VERY slight degradation in collective "pop." Watch some videos to get an idea. Not to say that you can't push a HPM to limits. It will piroflip on the deck with the best of them. Honestly unless you are better than 97% of flyers the loss of pop won't make much difference, and by then you'll be so good you can make anything fly well.
The other con is the requirement for a stronger collective servo.
SWM PROS: Hirobo's eCCPM is great, you will hardly notice the minor interactions that remain. Any that do remain will be due to servos, not the heli. This is not universal with eCCPM. Hirobo really got this one right.
SWM is noticeably quicker on cyclic/collective movements as there is more power to the swashplate with lower control motions.
Tail servo is up front. This is obviously not a universal eCCPM pro as some eCCPM helis have it out back, but with Hirobo that's the way the SWM designs are and they don't have it with HPM.
SWM CONS: It's eCCPM and suffers from everything that ECCPM helis suffer from. As the servos wear, you will need to occasionally adjust the travels and mixes to reoptimize the setup. Even then, through slop and potentiometer aging, they will create more and more interaction until you need to replace the servo, and then usually if you replace only one you get a non-optimal setup. Most people replace three at a time to avoid that. Although Hirobo did an awesome job, eCCPM will always only be as good as the servos that drive it. So there you have your con, SWM will need nice servos that need more frequent replacement. (I like to have an HPM bird to put "slightly" older servos from my SWM bird into. HPM tolerates mixes of servos well and can last more than a season on servos that are not eCCPM optimal)
And as good as Hirobo did, servo potentiometer technology still creates cyclic to cyclic interactions, or collective to cyclic, or cyclic to collective. Without an expensive radio these interactions will remain. With an expensive radio you can get pretty close to an HPM quality setup. If you aren't picky, you won't care. If you desire a high degree of precision, these interactions might be a little annoying. I'm a perfectionist and have to climb out of character to accept it. I have to tell myself that the setup is just fine even though I haven't checked it in a few gallons. And I know when I check it I will have to adjust an ATV here or there.
Honestly, the interaction even when present is hard to notice in flight as the air and randomness of wind, etc, creates almost as many unwanted heli motions. It's just that knowing that it's there causes me to go OCD. FAI gurus will probably get a little miffed at the fact that it will not maintain a contest setup without continual mothering. 3D guys will still need to tend to their setup, but can get away with a lot more negligence.
In the end, I don't think you can go wrong with either one. You can 3D either one. You can be precise with either one (assuming you have a nice radio for eCCPM interaction).
NEW 03-09-2010 03:33 AM PROFILE PM EMAIL POSTS BUDDY IGNORE ONLINE Attn: RR
Location: Bossier City, LA
My Posts This: Topic Forum Oh and neither is easier to fly (assuming both have been setup well).