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May 11, 2012, 02:06 PM
Registered User
BatterysIncluded's Avatar
Quote:
Originally Posted by fabric8 View Post
I'm pretty sure my kit is EPO, and it sounds like some kits (maybe the original one) was EPS. I'm wondering if the EPO kits have this issue or change in design.
I purchased mine last December and it says it is made from the new AeroCell foam. Is that the new EPO foam? I checked and it is straight as an arrow.
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May 11, 2012, 05:19 PM
Fixed and rotary wing flyer

Crooked nacelle issue - update


So I heard back from Great Planes today. They saw the pics and confirmed the tail/nacelle is crooked and shouldn't be that way. They're ordering 2 more kits themselves to determine if in fact there's a bad batch or production issue. They told me to hold onto my kit for now.

So the good news is that they acknowledge the plane shouldn't be like this. The bad news is I don't know how long before I'll get this replaced or corrected. I was really hoping to be up in the air within days of buying this plane. Looks like it could be a while
May 11, 2012, 05:21 PM
Fixed and rotary wing flyer
Quote:
Originally Posted by BatterysIncluded View Post
I purchased mine last December and it says it is made from the new AeroCell foam. Is that the new EPO foam? I checked and it is straight as an arrow.
I did ask about this and they told me there's no difference in the foam from all the kits. They're all AeroCell foam which isn't exactly EPO.
May 12, 2012, 01:27 PM
Registered User
its clearly a different foam to my plane so I guess I was sold an older version at the newer version price.
Oh well 2 yrs of joy fro it so far. I wish they'd make a bigger foam version and make some changes to how the canopy fits in as well.
May 12, 2012, 09:15 PM
Tony Audsley Retired Locksmith
Lockey's Avatar
Hey Tim

How interested are you in building? if so I have a depron Seawind and will re-do the plans for a larger one (1400mm wing span) if anyone is interested

https://www.rcgroups.com/forums/show...5#post20962856

Lockey
May 13, 2012, 03:59 PM
Registered User
that would be an interesting project!
May 23, 2012, 01:27 PM
Fixed and rotary wing flyer
I finally received a straight-nacelle'd SWEP last night directly from Great Planes support, who personally inspected a kit to send to me after I sent the email and pics of the problems with the ones I had received from TH. All 3 from TH had crooked nacelle's. The 1st 2 which shipped from the NV warehouse were the worst. The 3rd which they shipped from the IL warehouse was better, but still a little off.

Anyway, I built it up last night and everything went well until I throttled up. Somewhere between 1/2 and 3/4th's throttle (on my way to WOT), the motor mount exploded and the motor went flying forward, clearing that plane (thankfully) and landing on the floor. I'm really glad I was behind the plane. The motor shaft is bent, and there are little pieces of plywood motor mount around my living room

So, now I've got to build up a firewall. I'm just going to keep it simple, and mount the GF2215 in it's original configuration which is in front of the firewall.

I can't believe the luck (or lack of it) I'm having with this plane. Geez!
May 23, 2012, 01:42 PM
Registered User

Motor mount explosion


You just changed my mind about using the stock motor mount on my backup Seawind. I've heard some horror stories about the mount letting go after a few flights but your story takes the cake. Was your prop balanced?

Bob
May 23, 2012, 01:59 PM
Fixed and rotary wing flyer
Yup - perfectly. I inspected what was left of the mount, and it looks like the plywood is very brittle. I'll post pics tonight of what's left on the plane before I strip it off.
May 23, 2012, 07:27 PM
Registered User
fairplane's Avatar
https://www.rcgroups.com/forums/show...postcount=1880

This is what I did to use the rimfire after my mount exploded

Quote:
Originally Posted by fabric8 View Post
I finally received a straight-nacelle'd SWEP last night directly from Great Planes support, who personally inspected a kit to send to me after I sent the email and pics of the problems with the ones I had received from TH. All 3 from TH had crooked nacelle's. The 1st 2 which shipped from the NV warehouse were the worst. The 3rd which they shipped from the IL warehouse was better, but still a little off.

Anyway, I built it up last night and everything went well until I throttled up. Somewhere between 1/2 and 3/4th's throttle (on my way to WOT), the motor mount exploded and the motor went flying forward, clearing that plane (thankfully) and landing on the floor. I'm really glad I was behind the plane. The motor shaft is bent, and there are little pieces of plywood motor mount around my living room

So, now I've got to build up a firewall. I'm just going to keep it simple, and mount the GF2215 in it's original configuration which is in front of the firewall.

I can't believe the luck (or lack of it) I'm having with this plane. Geez!
Jun 03, 2012, 03:43 PM
Fixed and rotary wing flyer
Do you have some downward thrust on your motor? I maidened the Seawind today and at about 3-4 feet off the ground, I let go of the elevator which was at full up since it was already climbing and instead of the plane continuing to climb, it nose dove and I couldn't react fast enough with elevator. Only the wing mounting plate broke loose from the glue and the prop made a small hole on the center of the wing. Other than that, there was no damage.

Do I need to add downward thrust to prevent the plane from nosediving when I let go of the elevator stick?
Jun 03, 2012, 04:35 PM
Registered User
Short answer, yes. Additionally, you might want to check and make sure that the stabilizer has a small negative incidence relative to the wing. Reference, look at the comments by the designer of the Polaris; jetset44. The Polaris is designed with a negative 2 deg. incidence of both the motor and stabilizer relative to the wing. i.e. downthrust of the motor with the stabilizer set along the same incidence line. After flying both, the Polaris avoids the main problem that my SWEP has which is a dive when you add power quickly.

The Polaris thread is found under scratchbuilt foamies here in RCG.
Jun 03, 2012, 04:40 PM
Registered User
fairplane's Avatar
You actually need a litlle up thrust on your motor. There is some discussion as to how much, but when I researched for my Neptune it varied between 1-3 degrees. we settled on 1 deg- but havent tried it yet. On my seawind I tried to set it to zero- my plane is at the lake so cant check it, but my seawind still flies fine and I basically set it to zero if I am not mistaken. All my standoffs are the same length and the new firewall was glued to the foam same as the original was

https://www.rcgroups.com/forums/show...postcount=1880

Do I need to add downward thrust to prevent the plane from nosediving when I let go of the elevator stick?[/QUOTE]
Last edited by fairplane; Jun 03, 2012 at 04:45 PM.
Jun 03, 2012, 04:56 PM
Fixed and rotary wing flyer
Thanks Bob/Failane. Just to make sure I have the correct definition of thrust angle- downthrust vs up thrust, I should setup the angle like in the attached sketch, right?

If so, is that called up thrust or downthrust?
Last edited by fabric8; Jun 03, 2012 at 05:34 PM.
Jun 03, 2012, 05:51 PM
Fixed and rotary wing flyer
So looking at the polaris, I clearly see that the motor is angled downward - which from googling the term, is downthrust.

Bob, is this right?

Fairlane, are you saying I should do the opposite and have the motor point upward for upthrust?

Confussed.


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