Bearhawkers
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Chris In Marshfield and 2 others have joined the group Bearhawkers
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mattingly95969 and 27 others have joined the group Bearhawkers
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acroflyrgirl - added a new event, Who wants BACON strip ranch
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Battson replied to dissabling a trim tabAre you talking the older large tabs, or the small newer design?2015-09-18 01:46:03 -
lar replied to dissabling a trim tabYou only need one trim tab so there is no need to run to cables. Bob has admitted that. Pat just secured the second trim tab and just uses the one with his system.2015-09-18 01:26:17 -
Zzz replied to dissabling a trim tabBhawk, the electric trim servo is housed well inside the fuselage, so if you're confident that your fuselage is dry and water tight, it should be ok. I would think it would be hard to get this mounted after it's covered. I actually under-mounted my servo so that I could get better access to it...2015-09-17 20:57:46 -
Zzz replied to dissabling a trim tabYeah, Whee, the BBcode doesn't work so well in these groups. Maybe in a future release.2015-09-17 20:37:58
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Bhawk replied to dissabling a trim tabOne question for those of you that have worked with the electric trim actuator. How weather tight is it? since I have the large trim tabs I could just use one and with that one I could mount the actuator in the actual elevator and make a fairing to cover it, like what Kestrel was talking about....2015-09-17 19:01:31 -
Bhawk replied to dissabling a trim tabyou guys are thinking along the same lines as I was for a trim tab mod. One scenario I have come up with is running 2 separate push pull cables, (long ones) one for each tab, from the trim tab to the the trim wheel, routed through the elevator and then through the fuselage. Another is running a...2015-09-17 18:28:36
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whee replied to dissabling a trim tabkestrel, Thanks for the link. I forgot about those pics. While looking at the drawings just now I came up with pretty much the same idea of how to get the cables inside the elevator. Nice to see someone else had the same idea and is currently flying it that way.2015-09-16 20:42:04 -
whee replied to dissabling a trim tabI hesitate to share these sketches because they are so lousy but I'm going to anyways. First idea is to attach a push/pull cable for each trim tab directly to the servo, follow the path that the torque tube would have, weld in bushings to penetrate the H-stab rear tube and the elevator front tube...2015-09-16 20:06:56
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kestrel replied to dissabling a trim tabThere are some pictures of Pat's setup here: https://www.backcountrypilot.org/forum/whee-s-bearhawk-project-progress-16507?start=140#p2293122015-09-16 20:06:28
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Zzz replied to dissabling a trim tabI'm trying to find a photo of how the Maule cable is routed, with no luck. Just imagining this in my head I'm seeing the need for a new bracket where the cables terminate inside the fuselage, aft of the servo. Add a simple yoke to operate both cables from the single servo motor shaft. The unknown...2015-09-16 19:39:58
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Battson replied to dissabling a trim tabThere you are - cheap as chips.... http://www.aircraftspruce.com/catalog/appages/a920.php2015-09-16 08:50:50
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Battson replied to dissabling a trim tabI think I would use two separate cables, much cheaper to purchase, and easier to maintain (modular replacement is possible). I would not think a single tab is enough for landing with an empty plane, but would be fine for all other situations.2015-09-16 08:46:23
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Zzz replied to dissabling a trim tabThe problem seems to be splitting the cable, or using 2 cables to run to each tab, at least that's what I recall from the Fagan photos. Is a single small tab enough authority?2015-09-16 04:56:34
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Battson replied to dissabling a trim tabYes - we wore a lot of them out in our commercial jet boats. But they get a much harder life! Boat drivers for hire can be a rough bunch! But they seem to serve the trim system purpose nicely in the Maule, at least the older ones I've seen pulled apart. They can last for 20 years maybe, easily as...2015-09-16 04:50:39
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whee replied to dissabling a trim tabBattson, So you intend to use a push/pull cable? You don't have any concerns with that kind of cable? Man, I thought all New Zelanders hated those cables and that's why they done use them on their jet boats.2015-09-16 04:10:21
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kestrel replied to dissabling a trim tab...with the right cable, that would be an interesting retro-fit. I'm interested!2015-09-16 03:42:12
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kestrel replied to dissabling a trim tabOK. I missed that you were placing the cable between the torque tube and the trim tab. It didn't make much sense when I assumed that use of the torque tube implied the standard push rod and then using the cable to drive the torque tube....my bad.2015-09-16 03:40:05
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dissabling a trim tabStarted by Bhawk 33 Replies
Are you talking the older large tabs, or the small newer design?
Last replied by Battson on Thursday, 17 September 2015 -
Quick Build Time: Bearhawk 4 place vs Patrol
Thanks Battson, Your comments reflect exactly what I see in the logs of the builder pages on the Ransclan.com website. What's that old 2x2x2 adage ? ...twice as hard...twice as long..& twice as expensive. I am looking at acquiring something in the next few years, but I am a harsh realist. As Clint Eastwood once said in one of the Dirty Harry films.." A man has got to know his limitations ". The Cubcrafter kits look like a pretty Lego kits that just about snap together. The Rans S20 Raven, their latest Quick build kit, probably benefits from the evolution of continued refinement and ease of construction. Finally, the Bearhawk quick build kits all strike me as the type of kit that separates the men from the boys so to speak. That sort of leaves the option for me of buying an already assembled experimental or say a Cessna 180/182.
Last replied by Denali on Sunday, 08 February 2015 -
Stress relief on welds
Thanks for the info, one less thing I have to worry about if I just get an AviPro fuselage
Last replied by Tadpole on Wednesday, 21 January 2015 -
Profiled Tail
I've seen 170 guys put protective tapes on their horz stabilizers with little trouble. Which types of tape have you tried, Battson? In this forum thread, Denalipilot talks about a leading edge boot made for the 170, which has curved leading edges similar to our Bearhawks. https://www.backcountrypilot.org/forum/cessna-rock-guards-8335#p108099
Last replied by Zzz on Tuesday, 20 January 2015 -
Brakes for backcountry use
Personally, I'm really liking the look of the Beringer wheels and brakes, but since they use a tapered axle it would take a lot of modification to gear design to use them. Anyone else tried them or thought about them?
Last replied by Bear_Builder on Tuesday, 29 April 2014 -
Bearhawk Builder's Tools: required / nice to have
Are we talking about building a kit or scratch built? Scratch building I'm leaning more and more towards a brake and shear being necessary tools. Also, a low speed band saw for cutting out steel parts.
Last replied by Bear_Builder on Monday, 28 April 2014 -
Things Learned During Phase 1 Flight TestingStarted by whee 11 Replies
No, but that was the same idea I had. I think the door opening during flight is partially due to the pin not engaging far enough. I do feel some relief that the factory fuselage seems to flex the same way this scratch built does.
Last replied by whee on Monday, 13 January 2014 -
BH WeightStarted by whee 20 Replies
Hey Zane, our empty weight is 1,482 lbs. I was pleasently surprised. We've made no special efforts specifically to save weight, and have fuel injection. I can think of at least another 60lbs I can strip out in 20 minutes or less, if I ever need every last drop of performance - say for the annual STOL competition. From what I've seen, many recently completed machines (including some 4 cylinder) seem to weigh in above 1,500lbs, most about 1,550 lbs. So by that yard stick, yeah I guess we did ok. It does NOT feel light to move around on the ground on your own!
Last replied by Battson on Wednesday, 06 November 2013
