Dynam WACO YMF-5D (50”) – Build and Flight Review

Home Forums Z8RC Forum Dynam WACO YMF-5D (50”) – Build and Flight Review

This topic contains 16 replies, has 8 voices, and was last updated by avatar grifftj 9 months, 2 weeks ago.

Viewing 15 posts - 1 through 15 (of 17 total)
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  • #5688
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    z8rcdotcom
    Keymaster

    The Weaver Aircraft Company produced gorgeous biplanes from 1919 to 1947.  Today, WACO Aircraft (est .1982) produces modern WACO YMF-5Ds in Battle Cre[See the full post at: Dynam WACO YMF-5D (50”) - Build and Flight Review]

    #5689
    avatar
    z8rcdotcom
    Keymaster

    Thanks for the kind words. Sorry for the delay finishing up the review. You are going to love this plane!

    #5690

    Thank you for providing an outstanding review of this plane! I found this plane a few weeks ago and have been searching for a true review, but had not found one till now. I will be ordering one in the near future.

    One question… I am thinking of utilizing the many 3s battery packs I already have with a 13×6 prop to power this bird and add weight to the front if nessesary. Any thoughts on this type of set up?

    BTW outstanding website! I’m glad I stumbled accross the video of this plane.

    #5691
    avatar
    z8rcdotcom
    Keymaster

    If I get a chance I’ll amp a 13×6 on 3S for you.

    #5692
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    t1stuff
    Member

    I have the Dynam Peaks Pitts. Which is pretty much the same setup, and I have been trying to deal with the same issues you have seen. Help on any of the boards reveals that this is not a common problem. Thinks I’ve tried is playing with the cg quite a bit, Added washers to the engine mount to give it more down thrust, added a bit of spoileron action. The only thing that has worked is a throttle/elevator mix to keep it under control. This doesn’t help too much though if in in a 45 degree down, as it picks up speed it starts to lift without throttle. I spoke brought it by my plane club meeting last night, and they said to check the incidences. Eyeballing looks as though the horizontal stabilizer is not right, but I check it and it looks fine. The upper wing as you said may be too set too high. Please post any solution to your findings.

    #7387
    avatar
    Pond Sailer
    Member

    Thank you for the hind site of what to expect. the box just arived and I will start soon putting it together keeping in mind what I have read so far. thinking about making top wing adjustment holes now so I can change wing angle with a bit more ease at the field. I see what you mean about the flat finish. hmm. this would be a good time to spray on a shining finish while its in prices. not sure what to use on this foam. I would take any advice on this before I find out I might have picked something that damages the foam. the idea of adding mix to keep level while adding power in level flight I will keep in mind to do abit later. when I placed my order I added the $19 three axes gyro system from nitroplanes and will add this to make it more dossel to hand off plane in flight to friends. it can be turned on and off at radio. I don’t see anything but fun with this model.

    again thanks for the heads up. guess ill have to vet the bigger batteris that you have used (5000).

    PS

    #7421
    avatar
    z8rcdotcom
    Keymaster

    Updated.

    #7573
    avatar
    Pond Sailer
    Member

    Thank you for a timly update to adding the washers. I had not yet made any wing mods when I read your latest update. Do you have plans on doing any testing with the upgrade with auto pilot . UPGRADES
    Possible 3-axis gyro (not yet installed)

    I have the one that was suggested for this model and would very much want to read your take on this topic.

    Thank you in advance

    Gary

    #7706
    avatar
    Hawk570
    Member

    Great review. Thank you very much. One question if i may…

    I have to fly from a tall grass field. For biplanes i generally have to hand launch by holding the top wing at center, throttle up and release with about 60 degree or so angle. Do you think this plane has enough thrust and stability to routinely handle this? Id like to know before I order it.

    Thank you in advance.

    #7740
    avatar
    z8rcdotcom
    Keymaster

    Yes, but I haven’t done it. Maybe I’ll be able to test a hand launch soon…

    #8046
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    z8rcdotcom
    Keymaster

    The WACO hand launches just fine.

    #8049
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    Hawk570
    Member

    Thank you very much!!!! I just got the Peaks yesterday. I’ll buy this one next week.

    #8408
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    TwistedGrin
    Member

    I was recently at my local club feild when a freind of mine brought his Dynam Waco out to fly……looking over the bird….it is very nice looking and excellently detailed. The yellow paint scheme pops in the big Texas sky…the plane flies very very well….would slow down to nearly hovering horizontal. An excellent fiying aircraft…quiet and agile. Had to get back to the barn and see if Z8 had same remarks….well…..he does. So I too have ordered on of these planes and look forward to big yellow graceful lines in the air very soon

    Thanks for the website, updates and data

    Best regards,
    TwistedGrin

    #9599
    avatar
    Ef-eleven
    Member

    I stumbled across your site and find your approach to reviews refreshing. Being fairly new to the hobby all I hear is “HH is the ‘gold standard’”. This review of the Dynam Waco and other reviews by Z8 begin to confirm what I had expected all along. As yet I am still a r/c junior puke and question what I read and hear; the good, the bad and the ugly about the various manufacturers, their engineering of the model or equipment, or lack thereof. My hanger is sparse so I just don’t have the experience to know for myself. That said, your review comments have given me some direction to begin formulating my own opinions of the various products offered for this hobby. So thanks for that Z8.

    Now back to the Dynam Waco. As a biplane junkie the Waco needs to be a part of my hanger. This version by Dynam appears to be a formidable option. I have also noted that RocHobby/FMS has a Waco also, have you any thoughts of their version?

    #9601
    avatar
    z8rcdotcom
    Keymaster

    Thanks.

    I have never flown or even seen the FMS WACO. From product photos, it looks more detailed than the Dynam. The Dynam is a gorgeous model too, especially in the air, but not on par with what I’m seeing in the FMS photos.

    That said, some back of the envelope math reveals a large paper advantage:

    Dynam: 50″ span
    FMS: 40.6″ span
    (50/40.6)^3 = Dynam 187% larger

    Dynam: 1550g
    FMS: 1000g
    1550/(1.87*1000) = Dynam is 17% lighter, adjusted for scale

    Dynam: 14.8V*40A/=592W
    WACO: 11.1V*35A=389W
    (592/1550)/(389/1000) = FMS has 2% more power available to weight

    Dynam: $129
    FMS: $160
    Dynam costs 20% less
    Dynam costs 58% less per scale

    From a numerical perspective and knowing how well the Dynam flies, I think FMS has a paper hill to climb. The Dynam definitely has room for improvement in the air, it is not very precise at full power, but it is a delightful floater. Part of the problem is that it has so much power for a floater, which sets up an inherently unruly combination. One option is to reduce the Dynam’s throttle range and take an extension in the typical 15 minute flight time (3000 mAh 4s). Or, reduce battery size and make it even more delightful in the air, CG permitting.

    The FMS bird looks like a great flier too.

    Let us know which one you pick and how it works out.

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