Happymodel Moblite7 HDZERO


OK,  can we please keep responses made here to the titled model please, not other variants? (I'd like to keep the responses 100% relevent to the exact size/design/power/weight of this unit) 

The standard product comes with:-

GEMFAN 40mm 2 blade 1610 in a quite clear smoke grey.


They sit high in the 7mm deep "ducts", and around my house have suffered when the quad has become trapped under low furniture overhangs. While the tips are contained inside the duct, the prop shape rises 1-1.5mm above duct top at blade mid span, so this point is very vulnerable to impact abrasion.

They are also since being near transparent, like the std frame and minimal canopy, very difficult to locate after a crash, and it does not help that there is no effective buzzer to also help location.

SO, the question please, and remember, just for the  Happymodel Moblite7 HDZERO  ..................

What other props have people tried, and what results did they get in terms of visibility, agility, flight duration, etc??

There is a blue gemfan version, in an equally unsuitable wishy washy transparant shade!

HQ do a 2 blade in smoke and insipid Trans "green/yellow".

Have done some more investigation on the Moblite7 1S HDZero.

The only other 40mm 1.5mm hole props I have here are a league away from the supplied ones, being BetaFPV packaged 4 Blade, pitch unspecified, but looks more.

So, 4 blade not 2, and more pitch, what can possibly go wrong?

A quick test check flight on the supplied 2 blades indicated a current draw in medium speed circuit flight with a few punch climbs of between 3.5-7.3A. Motors only chill off them, FC board not feeling over hot but a bit hard to tell when the close proximity HDZero board gets "quite warm".

I was a bit surprised by the high end, and did a quick check, the FC AIO is rated 5A. Assuming this is 4x5A and the quad was pulling, rounded up, 7.5A max. Well in hand??

So I fitted the 4 blades and repeated the same flying pattern.

The results were very surprising! 3.5-6A rounded up (highest seen 5.7A)

LESS CURRENT??

Flight performance was, albeit on a very small check, noticably improved. Smoother flight, less drift, more positive turns, no change in punch, motors no more temp, FC no more temp.

I made no other changes to PIDs, etc, etc.

Weight is difficult as neither of my scales is accurate that low, but subjectively I'd guess at 2.5g for the set against maybe 1.5g. Certainly no feeling of any weight/inertia increase.

Has nobody else tested this area?

I received an EMail notice of a reply from LL to this thread, but its not actually appeared here.  

The tongue in cheek comment was regards that I was varying weight etc contrary to first post. Yup, in a way that is true I guess............ tough.......... 

Joking aside, the comment I made was because HappyModel seem to have made it their life's work to issue as many wildly different and confusing versions of the 75 sized Mobula as possible, with very different hardware compositions and power/weight. Some need a 3S, this is 1S only, for a start!

If you have watched the reviews of this specific model from Messrs Kim and Burns, then you'll know the quads as supplied are good for flat out large "open course" outdoor flying, but do not grip well in turns and suffer from throttle sensitivity (bouncing and difficulty in keeping to a set altitude).  Better out(doors) than in, a bit like throwing up bad food, basically!!

I bought solely for the HDZero/ELRS BNF situation. I'd have been happier with a 2S design as long as it had HDZero and ELRS. Maybe thats their next week's version.

I don't want to alter its flying ability in any major way, but the inconsistant height managment is a real pain in the posterior and needs addressing, apart from the poor visibility of a mostly transparent model against sky and if "lost" in greenery. (esp given no effective buzzer)


Its frustrating that Gemfan have some better (if still not ideal) colours in 40mm 1.5mm hole 3 and 4 blade, possibly even some with low enough pitch to substitute OK, but their 1.5mm range colours are different (and poorer) than their 1mm ones...............  Red?  1mm only.............  Purple?  1mm only........

(27-Mar-2023, 09:00 AM)BadRaven Wrote: I received an EMail notice of a reply from LL to this thread, but its not actually appeared here.  

The moderator logs show that he deleted the post at 10:12 BST yesterday. Maybe he posted in the wrong thread or subsequently realised what he posted was incorrect or inappropriate.

I had a few too many and realized that the words I typed out came out in a way that wasn’t constructive or productive.

No Problemo, I thought it was an amusing reply...............

I don’t really understand why they chose to go with such low pitch bi-blades for that model, especially when it’s got the extra weight of a digital vtx.

Maybe the thought was that it would extend flight time- but that doesn’t really work out if it takes significantly higher throttle just to hover- and I’d expect it to result in something that doesn’t corner well, and is about as agile as a flying pig.

I don’t have that model, but, if you were to toss some GF 1635-3 tri-blades on it, I’d expect a significant increase in agility, a significant increase in grip on turns, a significant increase in stability, and a significant decrease in flight time.

GF 1636-4 quad blades would probably allow it to fly quite well, but I don’t know if the motors could handle it without getting too hot- the datasheet for those motors gives almost no information.

Edit- the lack info on the datasheet also makes it hard to know if the increased pitch on either of those two GF props will result in a higher amp draw than the esc’s can handle.