View Full Version : Venture 30 head wobble
I have a venture 30 all stock and the head as allways wobbled. The original head cracked at the base and I replaced it with a new unit and it still wobble. I've used a dial indicator to check the main shaft and it is very strait!!!
When I replaced it, I noticed that the head fit on the main shaft is very tight and it wobble as mutch if not more than the original so I figured that it binds on the shaft. So I'm trying to loosen it up a little to make sure it sit perfectly on the shaft. Is this an issue with other venture owners and is it a correct procedure for head replacement?
Thanks'
gouki74
05-29-2008, 07:14 AM
are the blades balanced? my venture50 used to wobble during spool up because i had the blades bolted on too tight. loosening it made the shakes go away :)
did a trial run witout the blades, just the head and the flybar... it wobble just by turning it by hand, you see the head button move side to side...
gouki74
05-29-2008, 09:26 AM
it looks like your main shaft is bent. check your feathering spindle also. i love my jr venture50. it flies so smooth and is very easy to service!
I changed the main shaft tonight, the old one was still strait... had a new one so I changed it anyway.
The head is still wobbling, but... there is 2 bolts on the head, the Jesus bolt that goes throught the shaft and there is also a pinch bolt next to the Jesus bolt that pinch the head to the shaft... I found out that if I dont tight it up to much (in fact, very little, just so that it does not move) the head wobble far less!!!!!! If I tight it too much, it wobble like hell...
You guys think this bolt is to prevent the head from see sawing on the shaft?
Can I leave this bolt like that (loose) and go fly???
Thanks'
gouki74
05-30-2008, 03:55 AM
it should be tight and put threadlocker on it just to be sure it doesn't come off during flight
gouki74, the Jesus bolt and the pinch bolt uses nylocks, I can't put threadlock... The Jesus bolt must be very tight I know but the other bolt (pinch) also? All it does is warp my head fit on the shaft.
Thanks'
phantom1500
06-01-2008, 06:34 AM
I have a Vent 30 and found the same issuies...I used the vent 50 JRP960967, 60968 & 606969 head parts with Ergo 30 grips http://www.modelhelicopters.co.uk/acatalog/plans/jr_venture50/venture50_1.htm
and all vibrations and wobbles gone. see parts link.
The vent 30 head is not symetrical as you can see from the phase pin setup, the Vent 50 setup addresses this issue by having 2x phase pins opposed.
Hey phantom1500, thanks' for the tip. I will look into the Venture 50 parts swap... do you still use the Venture 30 spec feathering shaft, dampers and grips bearings or do you use the Ergo shaft and bearings and the Vent 50 dampers? What if I only change the head? I never felt that there was something wrong with the Venture 30 grips. Also, these 2 helis are pretty old (original Venture 50 and Ergo) and I'm not sure if the parts are still avail. in Canada!!??!!
Do you still fly you Venture 30? Is it "well used" (meaning lots of flight time)? If so, were did major slop developed on yours? On mine, slop have been minimal. A little here and there in the head linkages but especially in the tail pitch slider. I learned to fly on it so it never flew hard, crashed once because I landed in a hole with the training gear on... boom strike...
I flew it this morning for the first time in 3 years, boy, I was getting used to flying the T-rex450... big size difference... but the wobble is still there, there was a slight "waving action" in the fuel tank, the muffler extension was vibrating and a "whoa-whoa" sound... I was running it very rich since it hasn't been running for 3 years so it was running rough...
Thanks'
phantom1500
06-05-2008, 10:49 PM
sorry for the late reply...shift work sucks.
I used all the original Vent 30 parts just adding the new hub, yoke and phase ring, very simple swap and worked a treat. When you look at the [arts manual there is very little difference in the head.
Ergo grips used the same bearings...the vent grips have a slightly larger ID causing the bearings to float in the grip, te ergo is tighter as you will see when you push the old bearings into the new grips.
Still have her, shes my one and only as I just got burnt buying a ergo 60 off eBay that didn't exsist, I sold my trex 450 to fund it soo I'm a little unhappy.
there is only a little slop in the linkages and thats it, am going to convert my tail servo to a boom mount soon as the wife lets me spend money again, I also fitted a Trex 600N extreme 3D swash plate and washout hub but that took a bit off fiddling to get right but works great.
with the exhaust deflecter they can wag their tail so to speak and add vibration to the heli, I just cut 1/2 an inch off it and this stop that prob.
They are a good heli, strong and heavy but when sorted very stable, I'm no 3d wizard so it suits me fine, I leave the 3d for the sim, way cheaper.
I can still get parts for these through guys in the US, just did a web search on the part numbers, just remember to put JRP9 in front of all the part numbers and you should find heaps of sellers.
If she been sitting for a while there might be some corrosion in the engine main bearings causing that noise, I always use after run oil in mine to stop this if she is going to sit for a while.
Thanks'... I should receive the parts by next friday... I undid the blades grips to see if the spiddle shaft was bent and it was seized in the grip bearings (both sides), talk about vibes...! I destroyed one grip to be able to remove it...
Hey, Venture back up in the sky with the new Venture 50 and Ergo 30 head parts and grips... the head stopped wobbling when turned by hand and spooling up= that is good. It is a little less shaky in the hover (I've got the tail wagging a little now and I have not changed the gain!!??!!) but it is still doing that oversize bee sound and there is still some visible vibration on the pipe deflector, tail and in the tank (my blades were very little out of track, did not have my ball-link tool to fix it, I hope the sound and vibes are not related)... not as bad as before but it is still there. Going to check the fan/clutch assy. runout (the vibration does not look like it is high frequency, but...). What is the worst runout acceptable? Are you guy running the 3D paddles/flybar or the huge ones? I'm running the huge ones with the weights inside.
... I guess nobody care anymore but the vibes are almost all gone. Yes the blade tracking made a huge difference (one full turn on the grip). Still a little humming and slow vibe in the header tank (main tank also I guess), also visible on the vertical tail fin and the gyro (401) is having difficulty holding the tail smoothly. The slow vibe is probably blade related (old wooden blades that need some cord balancing) and the engine is running on the rich side, so the gyro is probably picking up this "richness" (and maybe the so-so tail servo is having a hard time but is was working fine with a 401 3 years ago... the 401 is new, going to check it's set-up also...)
I'll keep you posted if anyone is interested?
hueyman
06-22-2008, 09:15 PM
What head speed are you running. I've been using the stock head parts (except for ergo grips and thrust brgs) for 3 years without much of a vibe problem. And yes, the V30 head is not symetrical so you will see a wobble when turning it by hand. I had a violent shake (skids moving up and down very rapid) develop at one point. Chased that down to the dampers. Installed new ones and the shake went away. It's common to get vibes during spool up until the headspeed comes up or at a certain headspeed around the hovering range.
gouki74
06-24-2008, 08:12 PM
on my venture50 i am using the red big heavy paddles since i'm still new and learning flying. with a high headspeed i still feel my venture to be too twitchy so i added 15% expo and that is working fine with me. i'm using gf blades also, i tried using woodies once but it made the blades off track so instead of adjusting the head, i stopped using woodies instead :)
Yes I feel that the rubbers do make a big difference... when I installed the grips, they were stikky, so I replaced the rubbers and all is well... I can't say all my troubles were rubber related because I changed the head with Vent. 50 parts so I dont know for sure. I still can't see why the stock head is not symetrical and is inducing a wobble! What for??? All I can say is even with a rough engine and wood blades, the changes made every thing run right.
BTW I dont know what is my head speed since I dont have a optical tach, but I feel it is not too high but I still have nice cyclic.
phantom1500
06-27-2008, 07:23 AM
Hi Tibo, still alive and caring, I have a realy dumb shift roster and dont always get to the computer as much as I like.
The only other strange thing I had with the vent was the covering of the wood blades on the very tips had split and opened up when the head speed rose and the heli struggled to lift off. I was hard to see when it was flying, took the covering off and used an expoxy resin to seal and prob solved, now got macerikk carbon blades. I dont have any other noticable vibs, a rattling noise is all thats left. I am using the cheap piezo gyro off my Trex 450 and works great, didnt work while I had vibrations. Theres not much else to go wrong with them.
Cheers
Darren
Hi Phantom1500, thanks' for replys... haven't been flying the Venture in the last few weeks, I have no new reports on my progress. If I remember correctly, only small vibes in the tail that made it kick a little were present after changing the head and fixed some blade tracking. Yes those stock blades were ripping (covering) at the edges. I re-rapped them and seeled the ends with thin ca, worked like a charme...
Take care...
I changed my gyro (401) servo setting (put it in digital mode), double checked the blade tracking and I since then put 8 flights with good results. All vibes, tail waggs and "weird" noises are gone.
It is very windy lately and I found out that there is too much flybar action (controls felt too slow and heavy in the wind gusts). I changed the flybar and paddles for the kit's 3d ones. Yesterday, in great wind condition (at one time, my baseball cap flew off...), I flew my new set-up and I can say that stick inputs are very dominant (crisper cyclic) and I lost that "over control the heli"/ "mushy control" feel that I had before. The heli lost it's self correcting a bit but I could cope better with changing wind direction and speed. Can't wait for a calm day to push it ...
phantom1500
07-10-2008, 09:57 PM
Great to see you happy with the heli, makes a real difference to how you fly.
I just ordered a new gyro for mine as the small TeeBee off my old Trex450 just dosen't hold the bigger bird. Getting a JR G770 3D with the 8900G servo, also ordered an onboard starting system which looks cool and should make starting a lot lazier. Just have to wait till it arrives now....I have banned myslef from any flights till then cause knowing my luck I will crash before the stuff arrives and I wont be happy.
CHeers
Darren
phantom1500
07-10-2008, 10:00 PM
PS, I ditched those bulky flybar paddles and use the unweighted 3D paddles, still very stable and supper quick, I have Maverkk 550 carbon blades which are cheap and sweet.
We are also in our winter windy season so it's too dark, too cold, too windy and I'm too old. Roll on summer I say.
Phantom,
"... roll on summer I say..."
Hey, wait a minute, you're summer is my winter, I cant' allow that...
JR770, I'm thinking of putting that in my new Vibe 50... keep me posted on your results.
Yes the 3d paddles realy make a differance but I'm still using these cheap main blades (wood) and I think my tail pitch fork is letting me go (the gyro is fighting the tail's slack... loose flying all over the sky) and for the first time in a looooonnngggg while, I've dialed in expo on the cyclic to calm her (or me) down a little... any way, good luck with you're new hardware...
phantom1500
07-20-2008, 02:09 AM
Got the gyro and switchglo onboard starter and all fitted along with a new Trex600 canopy. The gyro was a breeze to get going but I cant get the tail wag at full gain on the DX7, I read that using a longer servo arm will increase input so that is my next plan, arm is fitted but weather is off and wife wont let me fly this one inside.lol. I have the new Maverkk patriot carbon 550 blades and these sound soo nice, I have been doing more nose in hover practice with the new gyro and what a difference...no more chasing the tail as well as everything else, made it much easier. The gyro holds well but I just want to get it to its limit so I know its using its full potenial as there is a hint of drift and from what ive read that shouldnt happen. Lovin it!.
forvols
08-19-2008, 12:02 AM
Jumping into the thread here.. I'm a new heli flyer and just recently purchased a NIB Ventue on Ebay for $100. Added donated OS 32SX-H, and some std servos with a Futaba 7CAP. Flying a Futaba 401 gyro.
I love the stability of the Ventue (using the larger paddles and the long flybar) but the bird really seems weak with the .32 in her. I have to get a really good run just to do decent stall turns. I'm running the stock woodies... just wondering if any of you can tell me if the bird gains any significant umph by using carbon blades (love the look of the Mavrikk Patriots)? IF not.. would a .37 provide any real difference or should I just accept the bird as a great basic trainer, then look to getting a 50 something for aerobatics? Save the money on the .37 and put it toward a 50hyper for a different bird?
Not bashing the Venture at all, it's just that I feel an obvious need for more ponies than what my OS.32SX is giving. Maybe it's just my engine?
Hi forvols, the Venture is a nice "bargain or garbage heli" as some may call it, but will prevent you from crying when you bash it in... Don't get me wrong, I love my Venture (with a Os 32), it started me in heli 5 years ago and it did (and still does) its job very well with a minimum of fuss. I still run wood blades (the same as 4 years ago... they are tuff) and it's doing fine with mild aero. (loops, flips, rolls, stalls...) but you have to "power manage" allot. I do 100 feet loops with a little finesse and will tail slide for 200 feet (I can make it fly up, really fly up... with some speed and finesse). Never tried the carbon nor the .37 but from my experience, the power gain will not be that dramatic and blade stiffness gain will not be put to much use. Fly it as it is and enjoy. If flown proper, it will give you some satisfaction. Save your money and get that hot rod .50. I know I did, my Vibe 50 will fly soon...