By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by CML

Seagull Grob Tutor G115

My build thread

All Topics | Latest Posts

Search for:  in Thread Title in  
MikeS11/07/2013 12:54:24
avatar
818 forum posts
240 photos

After reading the great review on the Tutor by David Ashby in the RCME special I decided I fancied one. Well a few months later I saw one on sale at the recent Wings N Wheels show for a good price of £165.00. Hold on though not enough cash in the pockets hmmmm.

Thought I would see what was on offer at the up coming Southern model airshow, however looking though a certain auction site led to me a well know model shop and they had it up for 135.00+8.00 P&P. Bargain I thought so I got it ordered.

And today it arrived.

Tutor unopened

Well as normal I could not check everything out before the delivery van was wheel spinning down the road. But on first inspection all looked good and seems to be complete. In the review it mentioned that mini servos would be required for the ailerons and also it looks like for the flaps as well.

A the bits

After a bit of searching through this very forum I came across the suggestion of using the Hitec HS-225 servo. Now from my own personnel experience of plastic gears on a plane of the size and weight would concern me so I went with the metal gear version just in case.

As I have a Four stroke sitting idle (sorry couldn't help it) it is time to decide should I go with the ASP 70 or use the ASP 91. Hmmm. The 70 is in the Pawnee 40 so I might swap things around

So, as soon as possible I will start and get it built.

Mike

Craig Kane11/07/2013 13:23:08
avatar
49 forum posts
12 photos

It looks great. Does it specify an EP setup?

David Ashby - Moderator11/07/2013 13:24:58
avatar
Moderator
10911 forum posts
1672 photos
607 articles

Look forward to seeing what you think Mike. Mine's been flying for a year now, still going strong.

MikeS11/07/2013 13:44:11
avatar
818 forum posts
240 photos
Posted by Craig Kane on 11/07/2013 13:23:08:

It looks great. Does it specify an EP setup?

Craig hope this helps but yes it say in the manual:

Model size: 45-52

Motor: 35mm 830 rev per volt

Prop: 11x7-12x7

ESC: 50a

Lipo: 4S 3200

 

David, I will keep all my build findings etc in this thread and of course later on when flying the maiden, I hope it flys as well as your does

Mike

Edited By MikeS on 11/07/2013 13:46:37

David Ashby - Moderator11/07/2013 19:15:09
avatar
Moderator
10911 forum posts
1672 photos
607 articles

Mike, good, look forward to that, you'll have some 'moments' during construction, I gave the kit a bit of a kicking in places but I enjoy flying it, it's a bit different which I like.

Craig, treat the suggested electric setup in the manual with a pinch of salt. It's built strong but that means weight, my model coming out at 8.5lbs all up. I use a Power 46 and 5S spinning a 13x8 which develops 900 watts approx.

Craig Kane12/07/2013 21:44:25
avatar
49 forum posts
12 photos

Mike & David,

thanks for the info. We only fly EP at our club so whilst I love the aircraft, I need to weigh up the pros and cons of a conversion. We are somewhat restricted to model size as our site isn't the greatest for big models.

MikeS16/07/2013 19:16:39
avatar
818 forum posts
240 photos

Well started putting things together today and have a question. I am used to fitting horns to my control surfaces and where I do understand how the ones Seagull use with the Tutor work I am unsure of one thing.

The aileron, elevator, rudder and flap control horns have aluminium washers top and bottom of the control surface. I can see under the covering where the 3mm pre-drilled hole is located is a larger hole. Do the washers fit in the the holes each side of the control surface or do I just put the 3mm bolt through the pre drilled hole and tighten up it up so the washers are on the surface of the covering?

Mike

Pete B - Moderator17/07/2013 10:45:39
avatar
Moderator
7578 forum posts
732 photos

From what I can see, page 7 and 8 of the manual show the washers on the surface of the covering, Mike.

As you tighten them down, they'll sink into the recess, on the flaps at least according to the diagram, but if there is no recess on the other surfaces, they'll remain slightly proud of the surface.

Pete

MikeS17/07/2013 18:50:05
avatar
818 forum posts
240 photos

Pete. That is also how I read the manual but was unsure as each control surface has the recess under the covering on both sides. The flaps it does show the washers recessed.. However each 3mm hole is not in the center of the recess holes. Not hard to sort out but thought I would wait for confirmation on here.

I have fitted them all but not recessed yet.

Mike

MikeS17/07/2013 19:00:33
avatar
818 forum posts
240 photos

I got a bit done today and have decided that unlike some of the artf' kits I have built this one is a little more tricky to do. This I think is down to the the manual not being very clear on what you need to do such as the control horns.

Anyhow moving on here is the progress so far.

I started off with the front nose gear. Remembering something from the review about have to half the nose gear leg this was straight forward.

dsc_0006.jpg

 

Next I worked on the rear undercarrige. I had to cut down the rear axels to fit and also found I did not need both locking collects as one was enough on each axel.

With this done I fitted them to the wings and then trail fitted the wings to the fuse.

dsc_0001.jpg

Mike

 

Edited By MikeS on 17/07/2013 19:41:14

Pete B - Moderator17/07/2013 19:34:31
avatar
Moderator
7578 forum posts
732 photos
Posted by MikeS on 17/07/2013 18:50:05:

However each 3mm hole is not in the center of the recess holes

Ah, the road to ARTF manufacture is paved with good intentions........smile

Rather than have the washers askew when they are tightened down, one option might be to fill the existing off-centre holes with 3mm balsa dowel - you could whittle a bit of scrap to make some - and when they're dry re-drill in the centre.

Really nice model though....thumbs up

Pete

MikeS17/07/2013 19:48:26
avatar
818 forum posts
240 photos

Very true Pete, they do try.

I did think of fitting the washers in the to the recesses and then re-drilling the holes as it feels this how the model was designed but did not want to cut the covering away until I had confirmation this was the correct way to do it.

Mike

Paul Marsh17/07/2013 22:37:41
avatar
3703 forum posts
1050 photos

I flew mine at the last Greenacres flyin. Strangely, Black Horse Models have brought out a slightly larger version, as they did with the Silence Twister

 

grob_tutor (7).jpg.

Edited By Paul Marsh on 17/07/2013 22:39:58

MikeS18/07/2013 07:31:59
avatar
818 forum posts
240 photos

Paul. I saw the Black Horse version at the recent Wings & Wheels show and in hindsight the larger version might have been the better size for me but as they say you make your choice's . The BH version has a 3.4" longer wing span than the Seagull version.

Well back to the Tutor. Now the fuel tank from the manual sits at an angle in the fuselage and bottom end sits in a slot. A small balsa block stops the tank from sliding backwards. I have my doubts about this as the tank does not feel very secure. I think some light packing foam around the tank will help.

 

dsc_0004.jpg

I next fitted the servos in the fuselage. A little adjustment was needed to fit them. The width was fine but the length need opening up a little on each hole. This didn't take long. I just need to change the servo horn postion to the oppersite side.

dsc_0010.jpg

 

With the servo's in place I trial fitted the rear and vertical stabs to get an idea on how they fitted. At first glance all looks good and cannot see anything that needs adjusting other than removing the covering where needed before glueing.

 

dsc_0011.jpg

Edited By MikeS on 18/07/2013 07:40:05

Tim Cheal31/07/2013 20:47:07
avatar
214 forum posts
54 photos

Mike I found this really useful, so thank you. I have just ordered one, and wondered how you are progressing and any other tips you have found.

Did you go with the .91 or the 70. I am not yet sure whether to use the ASP 80 or 91 I have?

Tim

MikeS31/07/2013 22:24:58
avatar
818 forum posts
240 photos
Tim. My build is on hold at the moment.

The Mrs wanted the main bedroom decorated so I have been busy with that but I hope to get back to the Tutor in the next few days.

I would go with the 80. The 91 might over power it and also need weight at the tail. Its a heavy plane for its size but from the review it flys well. I haven't decided on the engine. The 70 is on the Pawnee at the moment and the 91 does not fit with the supplied engine mount. Mike

Edited By MikeS on 31/07/2013 22:31:22

Jeff Hylton03/08/2013 05:12:10
2 forum posts

I've been trying to find time to finish one of these for at least a year now. Did anyone notice there is interference between the rudder control rod and elevator?

Paul Marsh03/08/2013 09:39:06
avatar
3703 forum posts
1050 photos

Yes, there is. Put a bend so that the rods miss each other.

Regarding engine sizes, I was going to put an 80 four stroke in it, but didn't have one at the time (now I have 2 spare!), and the full-size is more of a whine, than a four stroke sound.

So put a Kangke 50 two stroke, the same as on my Turbo Porter, and being quiet, powerful and light.

MikeS09/08/2013 22:20:21
avatar
818 forum posts
240 photos

Right well managed to spend a few hours getting the Tutor together.

One thing to note is the front wheel nose leg control rod does not line up as per the manual. Also the pictures show the control rods for the throttle and nose wheel threaded though holes each side of the fuselage. Well as I am fitting a Four stoke the throttle is not a problem for me as I have moved the position but the nose wheel is a problem.

dsc_0504.jpg

The rod supplied is a thick rod not thin like the throttle so bending it to fit is not going to work and will put too much strain on the servo. I ran mine straight from the servo to the nose leg and it works a treat.

I found removing the covering very time consuming due to how well the cover is attached the the surface of the model. Not that I am complaining but found I had to be very careful not to damage the balsa skin. Anyhow after sometime I had the covering removed and ready to be glued in to place.

Covering removed.

dsc_0494.jpg

dsc_0493.jpg

Mike

Edited By MikeS on 09/08/2013 22:29:12

MikeS09/08/2013 23:01:25
avatar
818 forum posts
240 photos

The tail and rudder have been glued in to position. I fitted my ASP 70 Four stroke with a 13x8 prop. I am a little concerned that this will under power the model a little but as it has been flying my Piper Pawnee 40 with an AUW of 8lbs I feel that it might be a good match.

Once it is all built and I have checked the CofG I may change the 70 to the 91 but we will see once I have done some taxi runs with it.

Both the 70 and 91 have the exhaust in the same position but I as of yet under decided on where I am going to place it. I am leaning towards getting some flexi exhaust and routing that out the bottom.

I have fitted the fuel pipe using the last of my stock which just happens to be bright pink. ( Dont ask ). As for the fuel tank this it seems is held in place by the canopy when fitted. You do glue in a small balsa block to stock the tank moving backwards.

 

dsc_0502.jpg

I am currently following the manual but I have been a fan of self tapping screws. I most likely will change over to nuts and bolts.

Mike

Edited By MikeS on 09/08/2013 23:13:17

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of RCM&E? Use our magazine locator link to find your nearest stockist!

Find RCM&E! 

Latest Forum Posts
Support Our Partners
Cambridge Gliding Club
CML
Slec
Wings & Wheels 2019
Gliders Distribution
electricwingman 2017
Pepe Aircraft
Advertise With Us
Sarik
Latest "For Sale" Ads
New Poll - Sticky situations...
Q: How often - when using superglue - do you end up with it on your fingers?

 Every time
 Occasionally
 Sometimes
 Rarely
 Never
 Wear rubber gloves

Latest Reviews
Digital Back Issues

RCM&E Digital Back Issues

Contact us

Contact us