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HelicopterMain Discussion › A Little DayDream Later Poof went the FB, but HOW
12-16-2013 05:04 PM  3 years agoPost 1
icanfly

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ontario

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but how anybody? I comes down to this really, nothing too rocket science, fb to fbl heli convert with the old fb head. I'm missing a vital link so converting is the next best thing (think old servos with not a heck of a lot of torque will be flying this).

(the rest of the original topic intent is now sideways)

Anyone try theese? formerly titled
Hast Doth Not A Main Blade Weighted Chinese Fair Sir?
Figure a return to zero pitch, better servo throws, dunno really too much more than what they doo on the tail, unless I try something myself. Might help in autos, yes, that's probably it.

Designers experiment with things, ideas, concepts, principles, notions, what ever. Ya never know until ya try. Making stuff, good fun, lots of other home building projects to do too.

cheerio

As a beside and not a back side, c weighted mains could allow for an improved dfc geometry and and more, Question is how much weight is needed?

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12-16-2013 06:45 PM  3 years agoPost 2
RCHSF

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NC

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Maybe take out 1/4 the weight of the bird airframe alone. (No electrics) Take that number and put 2/3 of that weight into the mains and 1/3 into tail blades.

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12-16-2013 09:26 PM  3 years agoPost 3
AWittleWabbit

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Take all the blades off and incrementally add weight. Rinse, I mean test and repeat.

Heli-itis sufferer.

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12-17-2013 12:17 AM  3 years agoPost 4
icanfly

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ontario

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I thought paddles were the weights 'n things.

Just thinking out loud here, TOL as it were.

Put some white skids and lowered the Shuttle chassis an hour ago, is looking kingly baaaaaaa-dass, wow, now what can I do to pull the fb cage 'n bits in favor of fbl? Old school rate gyros on pitch and roll instead?

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12-17-2013 02:34 AM  3 years agoPost 5
RCHSF

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NC

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now what can I do to pull the fb cage 'n bits in favor of fbl? Old school rate gyros on pitch and roll instead?
sure can, just the simplest of gyros should work, long as they are same, and set alike.

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12-17-2013 03:54 AM  3 years agoPost 6
icanfly

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ontario

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just came off messing with shuttle for an hour till not a few minutes ago. I have a pair of matching gyros for the pitch and roll and not sure I need one for either side of the aileron.

Took the fb, paddles/cage off, the floating bar hub and bolted the cranks to the main shaft head hub where the fb hub was. All was working with correct pitch at center swash. Need to invert and secure the follower hub while using the longer end of the cranks for the follower if something else doesn't look better follower wise, and need to set up more electronic support within to balance the heli, it's tail heavy at this time.

Will display some pics tomorrow perhaps. Some one advised to fly these old birds as they were designed, not by today's 3d standards. Thing looks like a modern style, anybody got a cf boom that'll fit I can cut to length. Some aspects of the tail are not 100 percent in design and an upgrade to alu parts later will have to be managed at some point. If I broke any old stuff they might not be replaced with oem because the parts may not exist after what now 20 years?

A concern about the rate gyros is that they need a certain supply of power to work and they didn't function totally on a micro servo. Will have to test.

inch by inch

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12-17-2013 05:34 PM  3 years agoPost 7
icanfly

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ontario

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head mod,

and American side

A cf boom would really lighten it, 21mm dia.

winter is nitro time, the places I could fly locally right now without a problem are numerous.

Now, the Chinese weight thing on the mains, that' was the fb but now that it's removed the heli is not going to take advantage of centrifugal forces it had with the fb. There are some ideas out there right now that people are playing with like those blade bullets from Blade on their mcpx's. There are also some blades with nubbs on the tip of the blade for same micro size helis. When I find a pic, it'll be posted.

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12-19-2013 02:56 AM  3 years agoPost 8
icanfly

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ontario

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bump, heha,

nah, seriously, here's the linkage in almost final form on that shuttle or any fb to fbl conversion using the fb head and linkage, it's the servos that need the cranks for mechanical advantage.

oops a pic of my 300zyx tail repair with ca/cf/kev/epoxy made it in here, things to repair plastic without much cost and wait time for new parts (replacement was $6).

Back to the above pics of the Shuttle fb linkage, bent single link rod is wire to size it first with all things equal with swash and blades. I cutout the lower sides of the canopy to fit the tank, the aileron servo is a single in the 90degree swash. Twist ties are to place the follower hub, later it will have set screws in it to hold it in the most optimal location. I could always fab something from alu too if need be.

As they say an oldie but a heli, lol. I'll be making my own complete from scratch one day, take care.

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HelicopterMain Discussion › A Little DayDream Later Poof went the FB, but HOW
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